You searched for subject:(Water treatment).
Showing records 1 – 30 of
1987 total matches.
◁ [1] [2] [3] [4] [5] … [67] ▶
University of Lund
1.
Kjerstadius, Hamse.
Enhancing anaerobic digestion in urban wastewater
management.
Degree: 2017, University of Lund
URL: https://lup.lub.lu.se/record/5557e275-92ef-4e03-95d0-b63aed20cd1d 
;
https://portal.research.lu.se/ws/files/22098807/Ph.d._Thesis_without_papers_Hamse_Kjerstadius.pdf
► The thesis investigates how anaerobic digestion could be utilized to improve wastewater management,specifically in regards to future expected regulation on sludge management in Sweden.Two possible…
(more)
▼ The thesis investigates how anaerobic digestion
could be utilized to improve wastewater management,specifically in
regards to future expected regulation on sludge management in
Sweden.Two possible paths of applying anaerobic digestion are
investigated. First, the usage of thermophilic anaerobicdigestion
of sludge in order to achieve pathogen hygienization. Second, the
usage of anaerobic digestion totreat wastewaters at decreased
temperature. The evaluation of each path was made through practical
labscale experiments. Additionally, the benefits of each path was
compared through desk top environmentalimpact studies and economic
analysis.The results for the first path showed that thermophilic
anaerobic digestion renders high pathogen hygienizationeven at
relative short exposure times. However no additional beneficial
impact on biogas production or thereduction of organic
micropollutants was found. The results for the second path showed
that the difficulty ofoperating the sensitive anaerobic digestion
process at low temperatures can be partly overcome by
simpleengineering batch tests. Furthermore, the dissolved methane
in the effluent wastewaters can be extractedusing membrane
contactors. Finally, the environmental impact assessment showed
that increased resourcerecovery from wastewater, as well as
decreased climate impact, can be achieved by applying
anaerobicdigestion on source separated domestic wastewaster.The
economic evaluation of the two paths showed that the implementation
of source separation systems isexpensive compared to implementing
the needed thermophilic hygienization. However, source
separationsystems would greatly boost nutrient recovery from cities
to agriculture which complies well with the goals ofthe Swedish
Environmental Protection Agency.
Subjects/Keywords: Water Treatment
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kjerstadius, H. (2017). Enhancing anaerobic digestion in urban wastewater
management. (Doctoral Dissertation). University of Lund. Retrieved from https://lup.lub.lu.se/record/5557e275-92ef-4e03-95d0-b63aed20cd1d ; https://portal.research.lu.se/ws/files/22098807/Ph.d._Thesis_without_papers_Hamse_Kjerstadius.pdf
Chicago Manual of Style (16th Edition):
Kjerstadius, Hamse. “Enhancing anaerobic digestion in urban wastewater
management.” 2017. Doctoral Dissertation, University of Lund. Accessed March 02, 2021.
https://lup.lub.lu.se/record/5557e275-92ef-4e03-95d0-b63aed20cd1d ; https://portal.research.lu.se/ws/files/22098807/Ph.d._Thesis_without_papers_Hamse_Kjerstadius.pdf.
MLA Handbook (7th Edition):
Kjerstadius, Hamse. “Enhancing anaerobic digestion in urban wastewater
management.” 2017. Web. 02 Mar 2021.
Vancouver:
Kjerstadius H. Enhancing anaerobic digestion in urban wastewater
management. [Internet] [Doctoral dissertation]. University of Lund; 2017. [cited 2021 Mar 02].
Available from: https://lup.lub.lu.se/record/5557e275-92ef-4e03-95d0-b63aed20cd1d ; https://portal.research.lu.se/ws/files/22098807/Ph.d._Thesis_without_papers_Hamse_Kjerstadius.pdf.
Council of Science Editors:
Kjerstadius H. Enhancing anaerobic digestion in urban wastewater
management. [Doctoral Dissertation]. University of Lund; 2017. Available from: https://lup.lub.lu.se/record/5557e275-92ef-4e03-95d0-b63aed20cd1d ; https://portal.research.lu.se/ws/files/22098807/Ph.d._Thesis_without_papers_Hamse_Kjerstadius.pdf
University of Minnesota
2.
Ortega, Karen.
Floating Treatment Wetlands: Inter-Relationships between Engineered Solutions for Nutrient Pollution and their Bodies of Water.
Degree: MS, Bioproducts/Biosystems Science Engineering and Management, 2018, University of Minnesota
URL: http://hdl.handle.net/11299/201738
► Floating treatment wetlands (FTWs) are a best management practice (BMP) currently used in several countries worldwide to reduce nutrient concentrations in bodies of water. This…
(more)
▼ Floating treatment wetlands (FTWs) are a best management practice (BMP) currently used in several countries worldwide to reduce nutrient concentrations in bodies of water. This study examines the chlorophyll-a reduction potential of FTWs in two bodies of water within Minnesota. Field measurements were taken to determine the physical and chemical characteristics of the water affected by the FTWs. Results indicate that the FTWs influence the water close to them but impacts on the entire body of water depend on the percent of the surface area covered by FTWs. FTWs were examined in two additional field sites to determine possible accumulation of periphyton mass on the FTW matrix over time. In both field sites, periphyton was found to accumulate at a relatively constant rate. In addition, the resilience of the FTWs to harsh winter conditions, as they would experience in Minnesota, was tested in a laboratory study. This study put the FTWs through repeated freeze-thaw cycles to estimate degradation of the FTW matrix material due to ice stress. A mathematical model was created to estimate the loss of material from the FTWs after a given number of freeze-thaw cycles, and the majority of the losses were found to occur during the freeze-thaw cycles. Further research on these subjects is recommended based on the findings from these experiments.
Subjects/Keywords: Floating treatment wetland; Water treatment
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ortega, K. (2018). Floating Treatment Wetlands: Inter-Relationships between Engineered Solutions for Nutrient Pollution and their Bodies of Water. (Masters Thesis). University of Minnesota. Retrieved from http://hdl.handle.net/11299/201738
Chicago Manual of Style (16th Edition):
Ortega, Karen. “Floating Treatment Wetlands: Inter-Relationships between Engineered Solutions for Nutrient Pollution and their Bodies of Water.” 2018. Masters Thesis, University of Minnesota. Accessed March 02, 2021.
http://hdl.handle.net/11299/201738.
MLA Handbook (7th Edition):
Ortega, Karen. “Floating Treatment Wetlands: Inter-Relationships between Engineered Solutions for Nutrient Pollution and their Bodies of Water.” 2018. Web. 02 Mar 2021.
Vancouver:
Ortega K. Floating Treatment Wetlands: Inter-Relationships between Engineered Solutions for Nutrient Pollution and their Bodies of Water. [Internet] [Masters thesis]. University of Minnesota; 2018. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/11299/201738.
Council of Science Editors:
Ortega K. Floating Treatment Wetlands: Inter-Relationships between Engineered Solutions for Nutrient Pollution and their Bodies of Water. [Masters Thesis]. University of Minnesota; 2018. Available from: http://hdl.handle.net/11299/201738
Addis Ababa University
3.
Tariku, G/Tsadik.
PERFORMANCE EVALUATION OF DRINKING WATER TREATMENT PLANT (CASE STUDY: GAMBELLA TOWN DRINKING WATER TREATMENT PLANT)
.
Degree: 2013, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/3967
► The conventional water treatment plant, especially in developing countries, faces major challenges in terms of assessing its operation and performance due to inappropriate technologies, insufficient…
(more)
▼ The conventional
water treatment plant, especially in developing countries, faces major
challenges in terms of assessing its operation and performance due to inappropriate
technologies, insufficient equipment and deficiency in skilled expertise. Simple but efficient
technologies are therefore necessary for reasonable evaluation of the daily performance of
the plant. Turbidity is thought of as a convenient surrogate to give favorable indication of the
biological and physical quality of the treated
water thus by extension provide a fair gauge of
the performance of the
treatment plant with respect to
water purification. Besides, it is fairly
simple to measure, cheap and can easily be understood by the operators. In this study the
performance of Gambella town
water treatment plant was assessed. The study was conducted
by assessing unit process capability, design, operation and maintenance potential to meet
optimized goals. From results of the assessments, root factors limiting optimum performance
were identified and improvement options were proposed. Major unit processes were
evaluated to project their design capabilities to meet current peak
water demand by selecting
appropriate loading rates as basis criteria. The results of the assessment found that all units
had the capability to satisfactorily treat
water at peak daily demand of 2000 m3/day. The
study assessed turbidity performances of sedimentation and filtration units by setting
optimized turbidity goals. The assessment results indicated that, settled
water turbidity was
measured less than 10 NTU. And filter turbidity spike of 6.5 NTU following backwash with
a reduction to 0.6 NTU after one hour was observed. Generally optimized performance goals
were not being achieved. This indicated high risk of microbial pathogens that could pass the
filtration barriers in the finished
water. Jar test experiments were conducted to evaluate the
effectiveness of Aluminum Sulphate (recently used by the
treatment plant), Ferric chloride
and Ferric Sulphate by comparing the optimum dose at optimum pH for highest turbidity
removal and relative costs. From the jar test results Aluminum Sulphate was found to be the
effective chemical with 45 mg/l optimum dose at pH 7.1 and the
treatment plant was
recommended to continue using Aluminum Sulphate at the optimum dose for the raw
water
characteristics during the evaluation period. Treated
water samples were collected from the
clear-
water well to test 14
water quality parameters according to the standard methods for
water and waste
water examinations. The collected samples were intended to show the
x
characteristics of the finished
water only during the evaluation period. The samples were
analyzed at the laboratory of GWTP and results were compared with WHO standards and
guidelines for drinking
water. Results of the analysis showed that all of the measured
parameters were within the acceptable range. In the assessment of factors limiting
performance of the
treatment plant; major factors were categorized as design, operational and…
Advisors/Committee Members: Dr. Ing. Berhanu Assefa (advisor).
Subjects/Keywords: DRINKING WATER TREATMENT;
WATER TREATMENT PLANT
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tariku, G. (2013). PERFORMANCE EVALUATION OF DRINKING WATER TREATMENT PLANT (CASE STUDY: GAMBELLA TOWN DRINKING WATER TREATMENT PLANT)
. (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/3967
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tariku, G/Tsadik. “PERFORMANCE EVALUATION OF DRINKING WATER TREATMENT PLANT (CASE STUDY: GAMBELLA TOWN DRINKING WATER TREATMENT PLANT)
.” 2013. Thesis, Addis Ababa University. Accessed March 02, 2021.
http://etd.aau.edu.et/dspace/handle/123456789/3967.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tariku, G/Tsadik. “PERFORMANCE EVALUATION OF DRINKING WATER TREATMENT PLANT (CASE STUDY: GAMBELLA TOWN DRINKING WATER TREATMENT PLANT)
.” 2013. Web. 02 Mar 2021.
Vancouver:
Tariku G. PERFORMANCE EVALUATION OF DRINKING WATER TREATMENT PLANT (CASE STUDY: GAMBELLA TOWN DRINKING WATER TREATMENT PLANT)
. [Internet] [Thesis]. Addis Ababa University; 2013. [cited 2021 Mar 02].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/3967.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tariku G. PERFORMANCE EVALUATION OF DRINKING WATER TREATMENT PLANT (CASE STUDY: GAMBELLA TOWN DRINKING WATER TREATMENT PLANT)
. [Thesis]. Addis Ababa University; 2013. Available from: http://etd.aau.edu.et/dspace/handle/123456789/3967
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Ottawa
4.
Ren, Yuxuan.
Synthesis, Characterization and Testing of Bi2MoO6-Based Semiconductors Applied in Photocatalytic Water Treatment
.
Degree: 2019, University of Ottawa
URL: http://hdl.handle.net/10393/38901
► Photocatalysis has received increasing attention in recent years as an effective technology in wastewater treatment applications. In this project, bismuth molybdate (Bi2MoO6), which is a…
(more)
▼ Photocatalysis has received increasing attention in recent years as an effective technology in wastewater treatment applications. In this project, bismuth molybdate (Bi2MoO6), which is a popular visible-light-driven photocatalyst, was prepared by solvothermal and hydrothermal methods. The synthesis conditions, including thermal reaction temperature, synthesis duration, and precursor stirring time of the solvothermal method were optimized based on the photodegradation of Rhodamine B (RhB) under visible light irradiation. Furthermore, the CeO2/Bi2MoO6 composites with different CeO2 loading content were successfully prepared by the wet impregnation route and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HRTEM), energy dispersive spectroscopy (EDS) and diffuse-reflection spectroscopy (DRS). The photodecomposition of RhB aqueous solution under visible light irradiation indicated that composites showed enhancements in degradation activity and 20 wt% CeO2/Bi2MoO6 exhibited the highest photocatalytic activity which was 24.13% and 83.33% higher than those of Bi2MoO6 and CeO2, respectively. This enhancement could be attributed to the formation of heterojunctions that effectively suppressed the recombination of holes and electrons. Quenching experiments revealed that photo-induced holes and superoxide radicals (O2•-) were the main active species during the degradation process. Reusability was assessed by a set of 5 cycling degradation experiments and the results indicated that the composite could be applied long-term. Moreover, the effect of some operating parameters including temperature, initial pH, catalyst dosage and initial substrate concentration were investigated.
Subjects/Keywords: Photodegradation;
Water treatment
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ren, Y. (2019). Synthesis, Characterization and Testing of Bi2MoO6-Based Semiconductors Applied in Photocatalytic Water Treatment
. (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/38901
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Ren, Yuxuan. “Synthesis, Characterization and Testing of Bi2MoO6-Based Semiconductors Applied in Photocatalytic Water Treatment
.” 2019. Thesis, University of Ottawa. Accessed March 02, 2021.
http://hdl.handle.net/10393/38901.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Ren, Yuxuan. “Synthesis, Characterization and Testing of Bi2MoO6-Based Semiconductors Applied in Photocatalytic Water Treatment
.” 2019. Web. 02 Mar 2021.
Vancouver:
Ren Y. Synthesis, Characterization and Testing of Bi2MoO6-Based Semiconductors Applied in Photocatalytic Water Treatment
. [Internet] [Thesis]. University of Ottawa; 2019. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/10393/38901.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Ren Y. Synthesis, Characterization and Testing of Bi2MoO6-Based Semiconductors Applied in Photocatalytic Water Treatment
. [Thesis]. University of Ottawa; 2019. Available from: http://hdl.handle.net/10393/38901
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Karlstad University
5.
Öberg, Emilia.
Ammoniumkvävereduktion vid lakvattenrening med mobil bioreaktor : vid olika temperaturer och fosfortillskott.
Degree: Karlstad University, 2017, Karlstad University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-56711
► Behovet av energieffektiva och välfungerande vattenreningssystem är stort, och växer i takt med den ökande befolkningsmängden. Lakvatten bildas då framförallt nederbörd rinner genom deponerat…
(more)
▼ Behovet av energieffektiva och välfungerande vattenreningssystem är stort, och växer i takt med den ökande befolkningsmängden. Lakvatten bildas då framförallt nederbörd rinner genom deponerat avfall. Problematiken kring lakvattenrening består i att bassängerna är placerade utomhus, vilket medför låga temperaturer under vinterhalvåret. Då lakvattenrening i huvudsak utförs med biologisk reningsteknik, medför de låga temperaturerna en sänkning i den bakteriella aktiviteten vilket försämrar reningseffektiviteten. Ett annat problem som ofta uppstår vid lakvattenrening är att det förorenade vattnet ofta består av höga halter kväve, medan fosforhalterna är låga. Detta ger en obalans i bakteriernas metabolism och kan leda till begränsningar i reningseffektivitet. I detta arbete har en nyutvecklad bioreaktor, som testas på Djupdalens avfallsanläggning, undersökts. Bioreaktorn togs i drift under hösten 2015 samt från april – december 2016. Mätdata från Djupdalen baserat på månatliga vattenprover och kemiska analyser för 2014 – 2016, har studerats för att ta reda på bioreaktorns bidrag till reningseffektvitet av ammoniumkväve. Egna vattenprovtagningar har utförts under maj 2017, där reningseffektivitet och aktiv biofilmsyta vid driftsättning av bioreaktorn studerats. Slutligen utfördes försök där biofilm från Djupdalen testats vid 17 – 18 liksom 12 – 15 ˚C med olika halter fosfortillskott, för att undersöka huruvida reningseffektiviteten kan förbättras om fosforhalten höjs. Resultaten tyder på att bioreaktorn bidrar till kraftig förbättring av reningseffektiviteten i luftningsbassängen, men förbättringspotential finns. Flera av de miljömässiga faktorerna i luftningsbassängen medför mindre gynnsamma förhållanden för den bakteriella tillväxten, såsom temperaturer under 15 ˚C, kraftiga underskott av fosfor i det inkommande lakvattnet och något för basiska pH värden. Genom egna vattenprovtagningar och medföljande kemiska analys framkom det att temperaturer över 15 ˚C i lakvattnet gynnar en snabbare utveckling av biofilmen. Slutligen visade laborativa försök att fosfortillskott vid temperaturer på 12 - 15 ˚C medförde en ökad reningseffektivitet, medan resultatet var oförändrat för temperaturer på 17 – 18 ˚C vid en uppehållstid på 24 timmar. Däremot visar en lägre uppehållstid på 16 timmar, att fosfortillskott påverkar försöken positivt för båda temperaturerna. Detta tyder på att ett fosfortillskott under hösten i luftningsbassängen, när temperaturerna i lakvattnet går under 15 ˚C, bör kunna medföra att bioreaktorn kan förbättra sin reningseffektivitet, trots den sjunkande lakvattentemperaturen.
The need for energy efficient and well-functioning water treatment systems is high, and grows as the growing population increases. Leachate is formed as water flows through landfilled waste. The problem of leachate treatment is that the reactors are located outdoors, which causes low temperatures during the winter months. As the leachate treatment is mainly carried out with biological purification techniques, the low temperatures…
Subjects/Keywords: Water Treatment; Vattenbehandling
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Öberg, E. (2017). Ammoniumkvävereduktion vid lakvattenrening med mobil bioreaktor : vid olika temperaturer och fosfortillskott. (Thesis). Karlstad University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-56711
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Öberg, Emilia. “Ammoniumkvävereduktion vid lakvattenrening med mobil bioreaktor : vid olika temperaturer och fosfortillskott.” 2017. Thesis, Karlstad University. Accessed March 02, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-56711.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Öberg, Emilia. “Ammoniumkvävereduktion vid lakvattenrening med mobil bioreaktor : vid olika temperaturer och fosfortillskott.” 2017. Web. 02 Mar 2021.
Vancouver:
Öberg E. Ammoniumkvävereduktion vid lakvattenrening med mobil bioreaktor : vid olika temperaturer och fosfortillskott. [Internet] [Thesis]. Karlstad University; 2017. [cited 2021 Mar 02].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-56711.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Öberg E. Ammoniumkvävereduktion vid lakvattenrening med mobil bioreaktor : vid olika temperaturer och fosfortillskott. [Thesis]. Karlstad University; 2017. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-56711
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Uppsala University
6.
Oskarsson, Lina; Frihammar, Esmeralda; Wallin, Mathias; Gobl, Madeleine; Kjellgren, Ylva; Lampinen, Alexi.
Sensorbaserad kvalitetskontroll av råvatten.
Degree: Earth Sciences, 2018, Uppsala University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-351934
► Denna rapport är utförd på uppdrag av företaget Norrvatten vilka driver vattenverket Görvälnverket i Jakobsberg utanför Stockholm. Studien är uppdelad i tre huvudmål. Det…
(more)
▼ Denna rapport är utförd på uppdrag av företaget Norrvatten vilka driver vattenverket Görvälnverket i Jakobsberg utanför Stockholm. Studien är uppdelad i tre huvudmål. Det första målet innefattar att utföra en analys av befintlig mätdata från en sensor som sitter inuti vattenverket. Data från verket jämfördes med väderdata för att få fram eventuella samband. Information om samband skulle kunna leda till att Norrvatten kan använda sin mätutrustning mer effektivt. I analysen användes MatLab och vissa samband mellan TOC (Total Organic Carbon), nederbörd och vattenstånd kunde ses och tydliga säsongstrender kunde även urskiljas. Det andra målet var att komma med ett förslag på mätsystem för kartläggning av skiktningen i vattnet utanför vattenverket Görvälnverket. Syftet med kartläggningen är att se om det finns behov av ett nytt, djupare, råvattenintag. Det tredje målet var att komma med ett förslag på ett alternativ på ett sensorbaserat varningssystem för förändrad råvattenkvalitet utanför verket. Systemets syfte är att ge information till verket om förhöjda halter av förorenande ämnen. För varningssystem och kartläggning av skiktning användes ett bedömningssystem för att väga olika alternativ till mätsystem mot varandra. Bedömningssystemet bestod av tre urvalsmatriser vilka vägde in hur många parametrar som kunde mätas, hur väl de kunde mätas samt kostnader. Utifrån urvalsmatriserna valdes de mest lämpade alternativen för respektive mätsystem. För att kartlägga skiktningen valdes ett mätsystem bestående av sensorer sittande på befintliga provtagningsledningar vid intagsledningarna i verket. För det sensorbaserade varningssystem valdes ett system med sensorer från företaget PME. Mätsystem är tänkt att placeras på egenbyggd plattform under vattnet. Det placeras sedan runt verket för att mäta olika parametrar.
Subjects/Keywords: Water Treatment; Vattenbehandling
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Oskarsson, Lina; Frihammar, Esmeralda; Wallin, Mathias; Gobl, Madeleine; Kjellgren, Ylva; Lampinen, A. (2018). Sensorbaserad kvalitetskontroll av råvatten. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-351934
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Oskarsson, Lina; Frihammar, Esmeralda; Wallin, Mathias; Gobl, Madeleine; Kjellgren, Ylva; Lampinen, Alexi. “Sensorbaserad kvalitetskontroll av råvatten.” 2018. Thesis, Uppsala University. Accessed March 02, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-351934.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Oskarsson, Lina; Frihammar, Esmeralda; Wallin, Mathias; Gobl, Madeleine; Kjellgren, Ylva; Lampinen, Alexi. “Sensorbaserad kvalitetskontroll av råvatten.” 2018. Web. 02 Mar 2021.
Vancouver:
Oskarsson, Lina; Frihammar, Esmeralda; Wallin, Mathias; Gobl, Madeleine; Kjellgren, Ylva; Lampinen A. Sensorbaserad kvalitetskontroll av råvatten. [Internet] [Thesis]. Uppsala University; 2018. [cited 2021 Mar 02].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-351934.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Oskarsson, Lina; Frihammar, Esmeralda; Wallin, Mathias; Gobl, Madeleine; Kjellgren, Ylva; Lampinen A. Sensorbaserad kvalitetskontroll av råvatten. [Thesis]. Uppsala University; 2018. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-351934
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of KwaZulu-Natal
7.
Oyetade, Oluwaseun Akinwole.
Adsorption of selected pollutants from aqueous solutions onto modified carbon nanotubes.
Degree: 2015, University of KwaZulu-Natal
URL: http://hdl.handle.net/10413/15687
► The significance of wastewater remediation before its discharge into the aquatic environment cannot be overemphasized. Adsorption has been proven to be effective for the removal…
(more)
▼ The significance of wastewater remediation before its discharge into the aquatic environment cannot be overemphasized. Adsorption has been proven to be effective for the removal of toxic pollutants from industrial effluents and/or wastewater, due to its simplicity in operation and the possibility of regenerating sorbents for reuse. This concept was exploited to achieve the effective removal of toxic contaminants from simulated wastewater. Carbon nanotubes, a fascinating member of the carbon family, possessing unique physical and chemical properties, have been reported as superior adsorbents for wastewater remediation purposes. Their large specific surface areas and porosity, hollow and layered structures, and great mechanical and thermal stability, makes them good candidates as sorbents for wastewater
treatment and contamination control.
This thesis interrogates the efficacy of carbon-structured nanomaterials containing multiwalled carbon nanotubes (MWCNTs) as the backbone, for the removal of divalent metal ions and organic contaminants from aqueous solutions. In this work, a novel adsorbent was successfully synthesized by incorporating a nitrogen-donor ligand (4-phenyl-2, 2':6', 2''-terpyridine) onto MWCNTs to afford nitrogen-functionalized MWCNTs (MWCNT-ttpy). The effectiveness of this sorbent towards the removal of divalent metal ions (Pb2+, Cd2+, Zn2+, Hg2+ and Cu2+), and organic contaminants (bisphenol A and ibuprofen) from aqueous solutions was investigated. The adsorption uptake of these pollutants onto MWCNT-ttpy was compared with that of acid-functionalized MWCNTs (MWCNT-COOH) to determine the sorbent with best removal efficiencies. Further, magnetic nanocomposites containing cobalt ferrite nanoparticles and MWCNT-COOH were synthesized in varying ratios to investigate their effectiveness for the removal of rhodamine B from aqueous solutions. All nanomaterials synthesized were characterized by means of TEM, SEM, TGA, BET, FTIR and Raman spectroscopy before application.
Batch adsorption experiments were conducted to determine the effects of pH, contact time, adsorbent dose, initial adsorbate concentration and temperature for each sorption process in order to evaluate the best experimental conditions necessary for pollutant removal. The experimental data were fitted into the pseudo-first order, pseudo-second order, intraparticle diffusion and Elovich models to determine the dynamics and rate-determining step of the adsorption processes. The mechanism of the process was investigated by fitting the experimental data into various two- and three-parameter isotherms.
iii
The application of MWCNT-ttpy for the removal of both heavy metal ions and organic pollutants demonstrated much enhanced uptakes than MWCNT-COOH. The incorporation of nitrogen onto MWCNT-COOH significantly improved the affinity towards the removal of metal ions, forming strong electrostatic and coordination interactions between the active sites on the adsorbent and metal ion cations. Increasing hydrophobicity of MWCNT-ttpy over MWCNT-COOH…
Advisors/Committee Members: Martincigh, Bice Susan. (advisor), Nyamori, Vincent Onserio. (advisor), Jonnalagadda, Sreekantha B. (advisor).
Subjects/Keywords: Waste.; Water.; Treatment.
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Oyetade, O. A. (2015). Adsorption of selected pollutants from aqueous solutions onto modified carbon nanotubes. (Thesis). University of KwaZulu-Natal. Retrieved from http://hdl.handle.net/10413/15687
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Oyetade, Oluwaseun Akinwole. “Adsorption of selected pollutants from aqueous solutions onto modified carbon nanotubes.” 2015. Thesis, University of KwaZulu-Natal. Accessed March 02, 2021.
http://hdl.handle.net/10413/15687.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Oyetade, Oluwaseun Akinwole. “Adsorption of selected pollutants from aqueous solutions onto modified carbon nanotubes.” 2015. Web. 02 Mar 2021.
Vancouver:
Oyetade OA. Adsorption of selected pollutants from aqueous solutions onto modified carbon nanotubes. [Internet] [Thesis]. University of KwaZulu-Natal; 2015. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/10413/15687.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Oyetade OA. Adsorption of selected pollutants from aqueous solutions onto modified carbon nanotubes. [Thesis]. University of KwaZulu-Natal; 2015. Available from: http://hdl.handle.net/10413/15687
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Texas A&M University
8.
Bhojwani, Sumay.
Water Network Optimization in Region L Texas.
Degree: MS, Chemical Engineering, 2018, Texas A&M University
URL: http://hdl.handle.net/1969.1/173890
► The objective of this research is to develop an MINLP model to optimally reconfigure water resources in the Region L Planning Area in South Central…
(more)
▼ The objective of this research is to develop an MINLP model to optimally reconfigure
water resources in the Region L Planning Area in South Central Texas containing all or parts of 21 counties.
Water scarcity is a major concern as we head towards a time where natural
water sources will be extremely limited and the usage will become incredibly high due to the increasing population and development activities.
The proposed MINLP model is based on a source-interceptor-sink superstructure that takes into account the various flows of
water from a source, its
treatment and subsequent blending with other treated streams to finally deliver
water that meets quality standards to the sinks. The aim is to optimally treat and distribute
water by
treatment method selection based on the economics, the ability for the technology to bring the quality to reusable levels, capacity bounds and minimization of the distribution costs involved. The model was developed and solved in GAMS modeling environment for multiple scenarios by varying the percentage of demand fulfilled by wastewater and the year for which the planning has to be done. The optimal solution details the number, type, capacity and location of
treatment units within the macroscopic network along with the
treatment and distribution costs associated. This literature also compiles a body of review literature that will aid in the development of
water networks that connect the supply chain, reuse, and/or recycle of
water systems.
Advisors/Committee Members: El-Halwagi, Mahmoud (advisor), Mannan, M Sam (committee member), Kwon, Joseph (committee member).
Subjects/Keywords: network optimization; water resource management; water treatment; water treatment cost
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bhojwani, S. (2018). Water Network Optimization in Region L Texas. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/173890
Chicago Manual of Style (16th Edition):
Bhojwani, Sumay. “Water Network Optimization in Region L Texas.” 2018. Masters Thesis, Texas A&M University. Accessed March 02, 2021.
http://hdl.handle.net/1969.1/173890.
MLA Handbook (7th Edition):
Bhojwani, Sumay. “Water Network Optimization in Region L Texas.” 2018. Web. 02 Mar 2021.
Vancouver:
Bhojwani S. Water Network Optimization in Region L Texas. [Internet] [Masters thesis]. Texas A&M University; 2018. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/1969.1/173890.
Council of Science Editors:
Bhojwani S. Water Network Optimization in Region L Texas. [Masters Thesis]. Texas A&M University; 2018. Available from: http://hdl.handle.net/1969.1/173890
University of Alberta
9.
Mann, Ajaypal S.
Removal of model waste-water bacteria by magnetite in water
and waste-water treatment processes.
Degree: MS, Department of Civil and Environmental
Engineering, 2012, University of Alberta
URL: https://era.library.ualberta.ca/files/jq085k29f
► Conventional disinfection processes used for water and waste-water treatment such as chlorination, and ozonation produce disinfection by products which are carcinogenic. The use of magnetite…
(more)
▼ Conventional disinfection processes used for water and
waste-water treatment such as chlorination, and ozonation produce
disinfection by products which are carcinogenic. The use of
magnetite as an alternative method of removing pathogenic
microorganisms from the water streams was proposed as it does not
produce any harmful by products. The removal of three model
bacteria Escherichia coli ATCC® 25922™, Pseudomonas putida ATCC®
17453™ and Micrococcus luteus ATCC® 4698™ using magnetite and the
mechanism of removal has been studied in this thesis. It was found
that at a cell : magnetite ratio of 1:50 the removal of bacterial
cells was 96.8% for E. coli, 94.8% for P. putida and 99.7% for M
luteus. To better understand the removal mechanism the effect of
varying magnetite ratios, buffers, pH, and mixing times were also
studied. The analyses indicate that magnetite could be efficiently
used for disinfection processes in water and waste-water treatment
industry.
Subjects/Keywords: Water treatment; Magnetite; Wastewater treatment; Bacteria; disinfection
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mann, A. S. (2012). Removal of model waste-water bacteria by magnetite in water
and waste-water treatment processes. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/jq085k29f
Chicago Manual of Style (16th Edition):
Mann, Ajaypal S. “Removal of model waste-water bacteria by magnetite in water
and waste-water treatment processes.” 2012. Masters Thesis, University of Alberta. Accessed March 02, 2021.
https://era.library.ualberta.ca/files/jq085k29f.
MLA Handbook (7th Edition):
Mann, Ajaypal S. “Removal of model waste-water bacteria by magnetite in water
and waste-water treatment processes.” 2012. Web. 02 Mar 2021.
Vancouver:
Mann AS. Removal of model waste-water bacteria by magnetite in water
and waste-water treatment processes. [Internet] [Masters thesis]. University of Alberta; 2012. [cited 2021 Mar 02].
Available from: https://era.library.ualberta.ca/files/jq085k29f.
Council of Science Editors:
Mann AS. Removal of model waste-water bacteria by magnetite in water
and waste-water treatment processes. [Masters Thesis]. University of Alberta; 2012. Available from: https://era.library.ualberta.ca/files/jq085k29f
University of Waterloo
10.
Choudhury, Tahina.
Woodchip Biofilters for Treatment of Particulate Phosphorus in Agricultural Runoff.
Degree: 2017, University of Waterloo
URL: http://hdl.handle.net/10012/12056
► Woodchip filters have received attention in recent years for their ability to sustain denitrification activity across multiyear time frames. However, in most freshwater aquatic ecosystems,…
(more)
▼ Woodchip filters have received attention in recent years for their ability to sustain denitrification activity across multiyear time frames. However, in most freshwater aquatic ecosystems, phosphorus (P) rather than nitrogen (N) is the nutrient considered most responsible for eutrophication. Previous studies have indicated that woodchip filters have limited ability to remove dissolved P, but P export in agricultural runoff is often dominated by particulate P (PP). Woodchip media, because of its high porosity, permeability, surface roughness and plate-like structure of the particles, could be effective for physical filtration of particulate phosphorus. In this study, woodchip filter systems were tested for treatment of PP in agriculturally impacted surface waters at five sites in southern Ontario.
A woodchip filter system installed near Bradford, ON was used to treat highly turbid root vegetable wash water from a local farm and focused on the treatment of total suspended solids (TSS) and PP. The full-scale treatment system consisted of a sedimentation tank (12.3 m3) followed by the woodchip filter (16.1 m3) and had two stages of testing. In the initial stage, the filter media consisted of woodchips with a layer of sawdust, and in the second stage, the media contained woodchips only. The full-sale treatment system was sampled from November 2014 to March 2016 and proved effective for TSS and PP removal during both treatment stages, averaging overall removal of 99% and 91%, respectively, in the first stage, and 96% and 77%, respectively, in the second stage. During the operation of the full-scale treatment system, the sludge within the sedimentation tank was regularly monitored and was removed on two occasions. Also during this time, sludge accumulation within the top layer of woodchips required replacement of the top layer on one occasion, September 2015.
A woodchip filter was installed near Barrie, ON to treat particulate P in an agricultural drainage ditch adjacent to fields where row crops are grown. In this case the filter consisted of 20 m3 of woodchips trenched in to the bottom of the stream (stream-bed filter). Stream flow was induced through the filter by placement of a gravel riffle at its downstream end. This filter was monitored from December 2014 to March 2016 and proved effective for P removal in the stream water, which had low to moderate turbidity, averaging total P removal of 58%, the majority of which was PP. Nitrate removal in the filter was modest, averaging only 1 mg/L NO3 – N, because the filter was operated at relatively high flow rates (average hydraulic retention time of 0.4 days) such that denitrification activity was incomplete.
A woodchip filter was installed near Keswick, ON to remove TSS and associated PP, as well as NO3 – N, from a tile drain at a sod farm. The filter consisted of 36 m3 of woodchips trenched into the subsurface near the drain outlet and was monitored intermittently from May 2014 to March 2016. Overall, geochemical parameters were not substantially changed…
Subjects/Keywords: Biofilter; Agriculture; Water Treatment; Phosphorus Treatment
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Choudhury, T. (2017). Woodchip Biofilters for Treatment of Particulate Phosphorus in Agricultural Runoff. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/12056
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Choudhury, Tahina. “Woodchip Biofilters for Treatment of Particulate Phosphorus in Agricultural Runoff.” 2017. Thesis, University of Waterloo. Accessed March 02, 2021.
http://hdl.handle.net/10012/12056.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Choudhury, Tahina. “Woodchip Biofilters for Treatment of Particulate Phosphorus in Agricultural Runoff.” 2017. Web. 02 Mar 2021.
Vancouver:
Choudhury T. Woodchip Biofilters for Treatment of Particulate Phosphorus in Agricultural Runoff. [Internet] [Thesis]. University of Waterloo; 2017. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/10012/12056.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Choudhury T. Woodchip Biofilters for Treatment of Particulate Phosphorus in Agricultural Runoff. [Thesis]. University of Waterloo; 2017. Available from: http://hdl.handle.net/10012/12056
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Anna University
11.
Elangovan C.
Management of water treatment plant residues;.
Degree: Management of water treatment plant
residues, 2014, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/23587
► Water is a scarce precious source which is the basic requirement for existence of all living things Local bodies agencies set up water treatment plants…
(more)
▼ Water is a scarce precious source which is the
basic requirement for existence of all living things Local bodies
agencies set up water treatment plants to process raw water to
convert them suitable for consumption Due to the chemicals involved
in the purification process in the form of coagulants, sludge
results as an inevitable byproduct of the treatment process The
responsibility of water utilities is not only limited to the
production of safe drinking water but also efficient and safe
disposal of water treatment plant residues Most of the existing
plants dispose sludge by discharging into the near by natural water
courses or at the point of extraction The discharge of sludge into
water body leads to accumulative increase in aluminium
concentration in the environment Though alternative methods of
sludge disposal such as land filling and soil conditioning of
sludge have been identified it is not feasible and economical to
follow the methods due to certain practical
constraints
Advisors/Committee Members: Subramanian K.
Subjects/Keywords: Civil engineering; Water treatment plant; Water treatment plant residues; Water treatment process
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
C, E. (2014). Management of water treatment plant residues;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/23587
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
C, Elangovan. “Management of water treatment plant residues;.” 2014. Thesis, Anna University. Accessed March 02, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/23587.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
C, Elangovan. “Management of water treatment plant residues;.” 2014. Web. 02 Mar 2021.
Vancouver:
C E. Management of water treatment plant residues;. [Internet] [Thesis]. Anna University; 2014. [cited 2021 Mar 02].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/23587.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
C E. Management of water treatment plant residues;. [Thesis]. Anna University; 2014. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/23587
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Alberta
12.
Mojir Shaibani, Parmiss.
The Application of Electrospun Photocatalytic BiFeO3
Nanofibers in Water Treatment.
Degree: MS, Department of Chemical and Materials
Engineering, 2012, University of Alberta
URL: https://era.library.ualberta.ca/files/p8418p939
► One-dimensional BiFeO3 (BFO) nanofibers were fabricated using the simple electrospinning of a Nylon6/BFO solution, carried out on a homemade electrospinning apparatus, and subsequent calcination at…
(more)
▼ One-dimensional BiFeO3 (BFO) nanofibers were
fabricated using the simple electrospinning of a Nylon6/BFO
solution, carried out on a homemade electrospinning apparatus, and
subsequent calcination at 600 °C. The photocatalytic activity of
the nanofibers and their application in water purification was
investigated against 4-Chlorophenol (4CP) as a model water
contaminant. A pseudo-first order kinetics model was utilized in
order to understand the degradation kinetics of the system. The SEM
images of the as-spun samples demonstrated the successful
production of nanofibers and the SEM images of the samples after
calcination confirmed the integrity of the continuous BFO
nanofibers. XRD analysis indicated the dominant presence of BFO
phase throughout the calcinated nanofibers. The results of the
UV-Vis spectroscopy exhibit the degradation of the 4CP by means of
the Photocatalytic activity of the BFO nanofibers. The kinetics of
the photodegradation of 4CP is believed to be governed by a
pseudo-first order kinetics model.
Subjects/Keywords: BiFeO3 nanofibers; water treatment; electrospinning
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mojir Shaibani, P. (2012). The Application of Electrospun Photocatalytic BiFeO3
Nanofibers in Water Treatment. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/p8418p939
Chicago Manual of Style (16th Edition):
Mojir Shaibani, Parmiss. “The Application of Electrospun Photocatalytic BiFeO3
Nanofibers in Water Treatment.” 2012. Masters Thesis, University of Alberta. Accessed March 02, 2021.
https://era.library.ualberta.ca/files/p8418p939.
MLA Handbook (7th Edition):
Mojir Shaibani, Parmiss. “The Application of Electrospun Photocatalytic BiFeO3
Nanofibers in Water Treatment.” 2012. Web. 02 Mar 2021.
Vancouver:
Mojir Shaibani P. The Application of Electrospun Photocatalytic BiFeO3
Nanofibers in Water Treatment. [Internet] [Masters thesis]. University of Alberta; 2012. [cited 2021 Mar 02].
Available from: https://era.library.ualberta.ca/files/p8418p939.
Council of Science Editors:
Mojir Shaibani P. The Application of Electrospun Photocatalytic BiFeO3
Nanofibers in Water Treatment. [Masters Thesis]. University of Alberta; 2012. Available from: https://era.library.ualberta.ca/files/p8418p939
Penn State University
13.
Taylor, Malcolm.
Coprocessing Water Treatment Residuals and Biosolids for Phosphorus Management in Wastewater Treatment.
Degree: 2013, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/17389
► Treatment and disposal of water treatment residuals (WTR) continues to be an area of increased focus in the drinking water industry due to increasingly stringent…
(more)
▼ Treatment and disposal of
water treatment residuals (WTR) continues to be an area of increased focus in the drinking
water industry due to increasingly stringent local, state, and federal regulations. One area with great potential to reduce operating costs is the beneficial use of WTR, defined here as an alternative to conventional disposal methods (e.g., landfilling, discharge to sanitary sewers). WTR have been shown to reduce the soluble P content in amended soils and reduce dissolved P in runoff
water and leachate. Whereas the majority of research investigating the P-binding capacity of WTR has focused on the co-application of WTR and biosolids, limited research has been completed on the effects of blending and conditioning WTR and biosolids prior to dewatering (hereafter referred to as coprocessing). Moreover, of the coprocessing studies that have been completed, minimal attention has been given to the effects of coprocessing on the soluble-P content of the resulting biosolids.
The purpose of this research was therefore to investigate coprocessing as an additional strategy for managing residuals produced in
water and wastewater
treatment under evolving nutrient management policies. The effects on sludge dewaterability and P concentrations in
water generated during dewatering (reject
water) were investigated. A unique aspect of this effort was a quantitative evaluation of how coprocessing influences the environmental lability of P in biosolids land application. Laboratory experiments were conducted to evaluate the effects of coprocessing on: (1) biosolids dewaterability and polymer dose, (2) the
water extractable P (WEP) concentration in dewatered biosolids, and (3) the total P concentration in reject
water from dewatering operations. Results were then validated through a case study involving full-scale
water and wastewater
treatment facilities.
Laboratory studies investigated dewaterability (using capillary suction time, CST) of combined alum residuals (Al-WTR) and anaerobically digested biosolids at various blending ratios (BR), defined as the mass ratio of WTR to biosolids on a dry solids basis. Without polymer addition, the CST was 160 s for a BR of 0.75 compared to 355 s for the biosolids alone. The operational polymer dose (OPD), defined as the polymer dose yielding CST of 20 s, was reduced from 20.6 g kg-1 dry solids for the biosolids alone to 16.3 and 12.6 g kg-1 when BR was 0.75 and 1.5, respectively. Precipitated Al hydrous oxides in the WTR likely caused flocculation of the biosolids particles through heterocoagulation or charge neutralization. The solids contents of the blended materials and biosolids at their respective OPDs were not statistically different (α = 0.05) following dewatering by a belt-filter press (BFP). It was concluded that coprocessing with Al-WTR improved biosolids dewaterability and reduced polymer dosage.
The impact of coprocessing on the partitioning of P during dewatering and the environmental lability of biosolids-P as measured by
water extractable P (WEP)…
Advisors/Committee Members: Herschel Adams Elliott, Dissertation Advisor/Co-Advisor, Herschel Adams Elliott, Committee Chair/Co-Chair, Brian Dempsey, Committee Member, Robert David Shannon, Committee Member, James Michael Hamlett, Committee Member.
Subjects/Keywords: Water Treatment Residuals; Biosolids; Phosphorus
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Taylor, M. (2013). Coprocessing Water Treatment Residuals and Biosolids for Phosphorus Management in Wastewater Treatment. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/17389
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Taylor, Malcolm. “Coprocessing Water Treatment Residuals and Biosolids for Phosphorus Management in Wastewater Treatment.” 2013. Thesis, Penn State University. Accessed March 02, 2021.
https://submit-etda.libraries.psu.edu/catalog/17389.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Taylor, Malcolm. “Coprocessing Water Treatment Residuals and Biosolids for Phosphorus Management in Wastewater Treatment.” 2013. Web. 02 Mar 2021.
Vancouver:
Taylor M. Coprocessing Water Treatment Residuals and Biosolids for Phosphorus Management in Wastewater Treatment. [Internet] [Thesis]. Penn State University; 2013. [cited 2021 Mar 02].
Available from: https://submit-etda.libraries.psu.edu/catalog/17389.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Taylor M. Coprocessing Water Treatment Residuals and Biosolids for Phosphorus Management in Wastewater Treatment. [Thesis]. Penn State University; 2013. Available from: https://submit-etda.libraries.psu.edu/catalog/17389
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Queens University
14.
Guo, Xinhai.
Polymeric Substances and Microbial Communities in Source Water and in Biofiltration Processes in the Treatment for Drinking Water
.
Degree: Chemical Engineering, 2015, Queens University
URL: http://hdl.handle.net/1974/12726
► The application of membrane filtration for drinking water treatment is limited by membrane fouling due to the accumulation of biopolymers. Biofiltration may be an effective…
(more)
▼ The application of membrane filtration for drinking water treatment is limited by membrane fouling due to the accumulation of biopolymers. Biofiltration may be an effective pretreatment approach to reduce the biopolymers, thus improving the performance of membrane filtration. Biological treatment with the microbial community associated with drinking water treatment systems can potentially play a positive role on chemical contaminant removal and biopolymer reduction through biodegradation. However, extracellular polymeric substances (EPS) developed inside biofilters through microbial secretions may have adverse effects on downstream membrane filtration if an EPS sloughing event occurs. In this study, the efficacy of biofiltration to remove biopolymers was investigated. Methods developed for the analyses of EPS associated with microbial flocs and biofilms in wastewater were adapted to analyze surface waters where biopolymers are typically found at lower concentrations.
Freeze-drying was found to be an effective method for concentrating water samples and to recover and analyze neutral and acidic polysaccharides (PS), but was ineffective for protein (PN) quantification. EPS extracted from the biofilter media was analyzed as part of the characterization of the microbial community associated with biofiltration. Results of water samples suggest that a passive biofilter was not effective for PS removal at the Peterborough drinking water pilot plant (DWPP). However, coupled with a roughing filter, a consistent removal of PS was observed in the passive biofilter at the Mannheim DWPP. Nutrient addition, hydrogen peroxide supplementation, inline coagulation and GAC were found to have impacts on PS removal and total EPS. Transparent exopolymer particles (TEP) are a group of acidic PS, potentially playing an important role in membrane fouling. A significant reduction (over 20%) of TEP was observed in the passive biofilter at the Mannheim DWPP, suggesting the positive role of biofilter in removing TEP. Subsequently, microbial community analysis using denaturing gradient gel electrophoresis (DGGE) and 16S rRNA sequencing have been undertaken to understand the microbial stability of biofiltration system by studying the microbial community association between source water and biofilter systems. High similarities of microbial communities (30-65%) based on DGGE analysis were found between source waters and biofilters, suggesting microbial community shift inside biofilters are due to the changes in the microbial community of source water. Biofilters do not appear to develop into stable compartmentalized communities. It appears these are subject to fluctuation or shifts linked to the conditions of the source water. Therefore, fluctuation of biofilter performance may be expected.
Subjects/Keywords: Biofiltration
;
Drinking Water Treatment
;
Biopolymers
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Guo, X. (2015). Polymeric Substances and Microbial Communities in Source Water and in Biofiltration Processes in the Treatment for Drinking Water
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/12726
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Guo, Xinhai. “Polymeric Substances and Microbial Communities in Source Water and in Biofiltration Processes in the Treatment for Drinking Water
.” 2015. Thesis, Queens University. Accessed March 02, 2021.
http://hdl.handle.net/1974/12726.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Guo, Xinhai. “Polymeric Substances and Microbial Communities in Source Water and in Biofiltration Processes in the Treatment for Drinking Water
.” 2015. Web. 02 Mar 2021.
Vancouver:
Guo X. Polymeric Substances and Microbial Communities in Source Water and in Biofiltration Processes in the Treatment for Drinking Water
. [Internet] [Thesis]. Queens University; 2015. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/1974/12726.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Guo X. Polymeric Substances and Microbial Communities in Source Water and in Biofiltration Processes in the Treatment for Drinking Water
. [Thesis]. Queens University; 2015. Available from: http://hdl.handle.net/1974/12726
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Namibia
15.
Sakaria, Hilya Kauna.
Identification and quantification of natural organic matter in the Windhoek operating company water treatment plant in Windhoek, Namibia
.
Degree: 2020, University of Namibia
URL: http://hdl.handle.net/11070/2796
► Natural organic matter (NOM) is a generic term for a mixture of organic, slightly water-soluble components found in soil, sediment and natural waters, which represents…
(more)
▼ Natural organic matter (NOM) is a generic term for a mixture of organic, slightly water-soluble components found in soil, sediment and natural waters, which represents severe challenges for the process control in water treatment plants as well as water distribution systems. The effective removal of NOM during drinking water treatment requires a good understanding of its character. The current study aimed to identify and quantify NOM present in the Windhoek Goreangab Operating Company (WINGOC) water treatment plant and to assess the efficiency of the plant in removing or reducing these organic matters. Water samples were collected at different points in the treatment plant starting with the raw ponds until the final treatment point once a week over a period of twelve months. Temperature, pH, organic content, nitrates, UV absorbance at 254 nm (UV254) and specific UV absorbance (SUVA) measurements were performed on the day of sampling. The molecular weight distribution of the organic fractions was determined using high pressure size exclusion chromatography (HPSEC) with fluorescence and UV detection methods. Raw water (ponds) had high dissolved organic matter, however this was greatly reduced after the dissolved air flotation, biological and granular activated carbon treatment processes. Dissolved organic carbon (DOC) removal efficiencies of up to 98% were achieved in some cases, which indicates that the treatment process employed at WINGOC treatment plant is effective in removing organic matter from the water. UV absorbance at 254 nm was found to be directly correlated to the organic content, decreasing gradually as the water is passing through different treatment stages. The reduction in UV absorbance could be ascribed to the loss of aromaticity due to depolymerisation of high molecular weight (HMW) organic matter, as is normally observed in samples of natural waters containing high levels of humic substances. Water samples had specific UV absorbance values ranging between 2.88 and 4.80 Lmg-1m-1 before ozonation, while these values were less than 2.38 Lmg-1m-1 after ozonation. From these values, it could be concluded that the NOM fractions at the WINGOC treatment plant contained complex mixtures of humic- and non-humic substances with varying sizes and degrees of hydrophobicity/aromaticity as can be deduced from the high UV absorbance and SUVA data obtained for the treatment stages before ozonation, and these were converted to hydrophilic, low molecular weight organics with low UV absorbance and SUVA values after the ozonation process. The UV and SUVA results were well supported by the molecular weight distribution data obtained in size exclusion chromatography. No clear trends could be deduced with regard to seasonal changes.
The findings of this study provided an improved understanding on the character and fate of NOM during different water treatment processes. However, since the results were obtained for the bulk water samples, future studies should involve fractionation of the NOM to enable identification of…
Subjects/Keywords: Organic matter;
Water treatment
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sakaria, H. K. (2020). Identification and quantification of natural organic matter in the Windhoek operating company water treatment plant in Windhoek, Namibia
. (Thesis). University of Namibia. Retrieved from http://hdl.handle.net/11070/2796
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sakaria, Hilya Kauna. “Identification and quantification of natural organic matter in the Windhoek operating company water treatment plant in Windhoek, Namibia
.” 2020. Thesis, University of Namibia. Accessed March 02, 2021.
http://hdl.handle.net/11070/2796.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sakaria, Hilya Kauna. “Identification and quantification of natural organic matter in the Windhoek operating company water treatment plant in Windhoek, Namibia
.” 2020. Web. 02 Mar 2021.
Vancouver:
Sakaria HK. Identification and quantification of natural organic matter in the Windhoek operating company water treatment plant in Windhoek, Namibia
. [Internet] [Thesis]. University of Namibia; 2020. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/11070/2796.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sakaria HK. Identification and quantification of natural organic matter in the Windhoek operating company water treatment plant in Windhoek, Namibia
. [Thesis]. University of Namibia; 2020. Available from: http://hdl.handle.net/11070/2796
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Arizona
16.
Leo, Caitlyn.
Toxicity of Arsenic, Uranium, PFOA, and PFOS to Chlorella Sorokiniana and Potential for Bioremeditation Applications
.
Degree: 2020, University of Arizona
URL: http://hdl.handle.net/10150/642024
► Off-grid, mobile nanofiltration units are being explored as a method for point-source arsenic and uranium removal from drinking water on Navajo Nation. One proposed treatment…
(more)
▼ Off-grid, mobile nanofiltration units are being explored as a method for point-source arsenic and uranium removal from drinking
water on Navajo Nation. One proposed
treatment method for the concentrated brine
treatment method produced during this process is the use of microalgae to remove contaminants via biosorption. Chlorella Sorokiniana was chosen for this study because of its high tolerance for salt and heat as well as previously demonstrated biosorption abilities. This study seeks to establish that C. sorokiniana is a viable species to produce
water fit for agricultural use nanofiltration brine by removing of arsenic, uranium, and two species of PFAS. Initial toxicity screenings, growth inhibition experiments, and an analysis of extracellular contaminant concentrations for arsenic, uranium, PFOA, and PFOS were performed to establish a proof of concept. Initial toxicity tests showed arsenic concentrations between 400-500 mg/L caused cell death in 72 hours for C. sorokiniana. From two-week growth inhibition experiments, the species IC50 for arsenic was found to be 184 mg As/L. While growth rate decreased by over 50% at the highest test concentration (200 mg As/L), biomass productivity only decreased by 26%. ICP-MS analysis of the growth media found at higher concentrations C. sorokiniana removed around 10% of arsenic in solution and accumulated 15 mg As/g biomass. When exposed to uranium, C. sorokiniana exhibited cell death after 72 hours at 20 mg/L and an IC50 of 7.04 mg/L. At 10 mg/L there was a 48% decrease in biomass productivity. The highest uranium removal achieved was 87% at an initial concentration of 0.5 mg/L. The adsorption capacity of C. sorokiniana was found to vary between 0.25 mg and 0.40 mg U/ g biomass. Neither arsenic or uranium caused cell death or significant decrease in cell growth at the highest concentrations found in environmental sampling: 0.055 mg As/L and 0.75 mg U/L. However, C. sorokiniana was not able to remove enough of either contaminant to achieve levels below the MCLs. PFOA caused cell death after 72 hours at 3.22 g/L but did not significantly impact C. sorokiniana growth rate or biomass productivity at concentrations up to 100 mg/L. For initial PFOA concentrations of 0.558, 5.58, and 55.8 mg/L, a 74.6%, 71.8%, and a 71.2% reduction in extracellular PFOA was observed. Estimated accumulation per gram biomass ranged from 0.2 – 22 mg PFOA/g biomass and increased with initial PFOA concentration. PFOS did not cause cell death at any tested concentrations, including its solubility limit. Furthermore, it did not impact growth rate or biomass productivity. For initial PFOS concentrations of 0.0485, 0.485, and 4.85 mg/L, a 90.6%, 97.4%, and a 96.6% reduction in extracellular PFOS was observed. Estimated accumulation per gram biomass ranged from 0.02 – 2.7 mg PFOS/g biomass and increased with initial PFOA concentration. The results indicate that there is potential for C. sorokiniana to be used in bioremediation of both PFOS and PFOA.
Advisors/Committee Members: Ogden, Kimberly (advisor), Guzman, Roberto (committeemember), Hickenbottom, Kerri (committeemember).
Subjects/Keywords: Algae;
Bioremediation;
Water treatment
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Leo, C. (2020). Toxicity of Arsenic, Uranium, PFOA, and PFOS to Chlorella Sorokiniana and Potential for Bioremeditation Applications
. (Masters Thesis). University of Arizona. Retrieved from http://hdl.handle.net/10150/642024
Chicago Manual of Style (16th Edition):
Leo, Caitlyn. “Toxicity of Arsenic, Uranium, PFOA, and PFOS to Chlorella Sorokiniana and Potential for Bioremeditation Applications
.” 2020. Masters Thesis, University of Arizona. Accessed March 02, 2021.
http://hdl.handle.net/10150/642024.
MLA Handbook (7th Edition):
Leo, Caitlyn. “Toxicity of Arsenic, Uranium, PFOA, and PFOS to Chlorella Sorokiniana and Potential for Bioremeditation Applications
.” 2020. Web. 02 Mar 2021.
Vancouver:
Leo C. Toxicity of Arsenic, Uranium, PFOA, and PFOS to Chlorella Sorokiniana and Potential for Bioremeditation Applications
. [Internet] [Masters thesis]. University of Arizona; 2020. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/10150/642024.
Council of Science Editors:
Leo C. Toxicity of Arsenic, Uranium, PFOA, and PFOS to Chlorella Sorokiniana and Potential for Bioremeditation Applications
. [Masters Thesis]. University of Arizona; 2020. Available from: http://hdl.handle.net/10150/642024
Edith Cowan University
17.
Jia, Zhe.
Functional application of iron-based metallic glasses in catalysis technology: Design and mechanism.
Degree: 2017, Edith Cowan University
URL: https://ro.ecu.edu.au/theses/2021
► In this PhD study, two novel, multifunctional Fe-based metallic glasses (MGs) with the nominal components of Fe78Si9B13 (also known as 1K101) and Fe73.5Si13.5B9Cu1Nb3 (1K107) are…
(more)
▼ In this PhD study, two novel, multifunctional Fe-based metallic glasses (MGs) with the nominal components of Fe78Si9B13 (also known as 1K101) and Fe73.5Si13.5B9Cu1Nb3 (1K107) are manufactured by melt-spinning method to investigate the catalytic performance. The two produced glassy ribbons exhibit advanced catalytic capability when being employed as catalysts for the industrial dye pollutant treatment, presenting a great potential in achieving actual industrilization. Five dyes with different chemical bondings were treated as the targets for monitoring the catalytic efficiency, reusability and the corresponding mechanism.
In the aspect of dye degradation and mineralization efficiency, the individual and combined effects of the various reaction parameters are firstly investigated by employing an orthogonal matrix (L16(45)) experimental methodology. Nearly 100% color removal is achieved within 20 min under premium experimental control. The effects of catalyst dosage, dye concentration, peroxides concentration, light intensity and pH on dye degradation efficiency are fully discussed. The production of high redox radicals, such as hydroxyl radicals (•OH) and sulfate radicals (SO4•−), is investigated by quenching experiments. Total organic carbon (TOC) is employed for investigating the dye mineralization.
In the aspect of sustainability and reusability, the Fe78Si9B13 metallic glass exhibited a superior surface stability and reusability while activating persulfate as indicated by it being used for 30 times while maintaining an acceptable methylene blue (MB) degradation rate. The produced SiO2 layer on the ribbon surface expanded strongly from the fresh use to the 20th used, providing stable protection of the buried Fe. It is the first time to report that SO4•− with a high oxidative potential are successfully activated from persulfate by a Fe78Si9B13 metallic glass.
The catalytic mechanisms using Fe-based MGs as catalysts can be divided into three parts in this work: 1) electron transfer ability, 2) activation rate of peroxides, and 3) pre-adsorption behavirour. For the electron transter ability, the structural relaxation (α-relaxation) by annealing in an amorphous Fe78Si9B13 alloy is studied at the atomic scale to compare the effect of atomic packing structures in amorphous and crystalline catalysts on dye degradation efficiency. The volume fractions of the crystalline structures, such as α-Fe, Fe2Si and Fe2B, in the as-received and annealed MGs are fully characterized. It is found that the randomly atomic packing structure with weak atomic bonding in the as-received metallic glass has an efficient electron transfer capability, presenting advanced superiorities in the aspects of production rate of hydroxyl radicals (•OH), dye degradation rate (k) and essential degradation ability (KSA) for water treatment. The discovery of this critically important work unveils why using MGs as catalysts having higher reactivity than the crystalline materials, and more importantly, provides new research opportunities into the study of…
Subjects/Keywords: Metallic glass; Water treatment; Engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Jia, Z. (2017). Functional application of iron-based metallic glasses in catalysis technology: Design and mechanism. (Thesis). Edith Cowan University. Retrieved from https://ro.ecu.edu.au/theses/2021
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Jia, Zhe. “Functional application of iron-based metallic glasses in catalysis technology: Design and mechanism.” 2017. Thesis, Edith Cowan University. Accessed March 02, 2021.
https://ro.ecu.edu.au/theses/2021.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Jia, Zhe. “Functional application of iron-based metallic glasses in catalysis technology: Design and mechanism.” 2017. Web. 02 Mar 2021.
Vancouver:
Jia Z. Functional application of iron-based metallic glasses in catalysis technology: Design and mechanism. [Internet] [Thesis]. Edith Cowan University; 2017. [cited 2021 Mar 02].
Available from: https://ro.ecu.edu.au/theses/2021.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Jia Z. Functional application of iron-based metallic glasses in catalysis technology: Design and mechanism. [Thesis]. Edith Cowan University; 2017. Available from: https://ro.ecu.edu.au/theses/2021
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Rice University
18.
Gonzalez Pech, Natalia Isabel.
Development of iron oxide nano materials-based technology for arsenic remediation.
Degree: PhD, Chemistry, 2016, Rice University
URL: http://hdl.handle.net/1911/96231
► In 2005, the Colvin group proposed the use of magnetite nanoparticles for arsenic adsorption. This would allow the reduction of waste significantly with the additional…
(more)
▼ In 2005, the Colvin group proposed the use of magnetite nanoparticles for arsenic adsorption. This would allow the reduction of waste significantly with the additional advantage of magnetic-driven separation at low fields. However, despite the efforts of several groups around the world, the use of arsenic sorbents based in nanomaterials is not yet feasible. Still, the study of new iron-based nanomaterials for arsenic uptake has been increasing over the last years. During my PhD program, I have analyzed the performance of magnetite nanoparticles synthesized by several methodologies with both batch experiments and column tests and varying conditions including groundwater with high silica concentrations (Chapter 4). Silica is one of the most common interferences and dramatically decreases the arsenic removal capabilities. My work included the evaluation of arsenic removal capabilities on site (Salamanca, Mexico) and the comparison with commercially available arsenic sorbents under those difficult conditions− [SiO2] =85ppm and pH=8 (Chapter 3).
In spite of the comparable performance of the nanoparticles to other commercial sorbents, their small-scale production and the lack of a simple filtration setup motivated us to design a material that could be used under real-world operation conditions. We proposed the use of clusters of nanoparticles in order to benefit of the properties of both the nanoparticles and the bulk material. The understanding of the mechanism of the synthesis, the effect that synthetic parameters have in the cluster size and unit size, and the corresponding effect in arsenic adsorption are discussed in Chapter 5.
Currently, the most pressing needs for groundwater
treatment is in developing countries; this forces the use of highly cost-effective strategies. In order to develop a material that can feasibly solve the needs on the field in an inexpensive way, one of the projects was to modify the kitchen synthesis of nanomagnetite previously introduced by our group. Even when in the past a cheap synthesis was achieved, it was a process with several steps and the nanoparticles were not able to absorb arsenic. In this work (Chapter 6), a one-pot synthesis is proposed and studies have shown that the nanoparticles thereby obtained have much better arsenic removal performance than the nanoparticles prepared by thermal decomposition making the material very promising.
Even though the work proposed herein will not solve the problem of arsenic contamination, it provides a grasp of the requirements for the implementation of nanomaterials in
water treatment technologies and narrows the gap between design of nanomaterials in the lab and their application on the field.
Advisors/Committee Members: Colvin, Vicki L. (advisor).
Subjects/Keywords: nanotechnology; arsenic; water treatment; nanomaterials
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gonzalez Pech, N. I. (2016). Development of iron oxide nano materials-based technology for arsenic remediation. (Doctoral Dissertation). Rice University. Retrieved from http://hdl.handle.net/1911/96231
Chicago Manual of Style (16th Edition):
Gonzalez Pech, Natalia Isabel. “Development of iron oxide nano materials-based technology for arsenic remediation.” 2016. Doctoral Dissertation, Rice University. Accessed March 02, 2021.
http://hdl.handle.net/1911/96231.
MLA Handbook (7th Edition):
Gonzalez Pech, Natalia Isabel. “Development of iron oxide nano materials-based technology for arsenic remediation.” 2016. Web. 02 Mar 2021.
Vancouver:
Gonzalez Pech NI. Development of iron oxide nano materials-based technology for arsenic remediation. [Internet] [Doctoral dissertation]. Rice University; 2016. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/1911/96231.
Council of Science Editors:
Gonzalez Pech NI. Development of iron oxide nano materials-based technology for arsenic remediation. [Doctoral Dissertation]. Rice University; 2016. Available from: http://hdl.handle.net/1911/96231
Rice University
19.
Xu, Jiarui.
Ultrathin and Tunable Graphene Oxide Membranes for Pressure Driven Water Filtration.
Degree: MS, Engineering, 2016, Rice University
URL: http://hdl.handle.net/1911/107737
► The emerging 2D material, graphene oxide (GO), provides an ideal substitute to overcome many major issues of water treatment membranes. The performance of GO membranes…
(more)
▼ The emerging 2D material, graphene oxide (GO), provides an ideal substitute to overcome many major issues of
water treatment membranes. The performance of GO membranes can be adjusted by controlling the interlayer spacing, but manipulating the interlayer spacing in subnanometer range and applying GO membranes to pressure driven filtration application remain big issues. Here, asultrathin GO membranes (50 nm) were fabricated, and diamines were used as crosslinker to control the interlayer distance and prevent GO expansion in
water. XRD confirms that crosslinked GO (cGO) membrane has smaller interlayer spacing expansion (from 7.83 Å to 10.6 Å), compared with non-crosslinked GO membrane (from 7.20 Å to 13.3 Å). The
water permeance of all cGO membranes are about 60% of non-crosslinked GO membranes. cGO membranes have the same low rejection for monovalent ions (Na+ and Cl-) but more than double rejection for divalent ions (Mg2+ and SO42-), which suggests that size exclusion is the predominant mechanism for salt rejection. These demonstrates that the crosslinkers successfully adjust the interlayer distance of GO membranes in subnanometer range and alleviate GO expansion in
water.
Advisors/Committee Members: Li, Qilin (advisor).
Subjects/Keywords: Graphene oxide; Water treatment
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Xu, J. (2016). Ultrathin and Tunable Graphene Oxide Membranes for Pressure Driven Water Filtration. (Masters Thesis). Rice University. Retrieved from http://hdl.handle.net/1911/107737
Chicago Manual of Style (16th Edition):
Xu, Jiarui. “Ultrathin and Tunable Graphene Oxide Membranes for Pressure Driven Water Filtration.” 2016. Masters Thesis, Rice University. Accessed March 02, 2021.
http://hdl.handle.net/1911/107737.
MLA Handbook (7th Edition):
Xu, Jiarui. “Ultrathin and Tunable Graphene Oxide Membranes for Pressure Driven Water Filtration.” 2016. Web. 02 Mar 2021.
Vancouver:
Xu J. Ultrathin and Tunable Graphene Oxide Membranes for Pressure Driven Water Filtration. [Internet] [Masters thesis]. Rice University; 2016. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/1911/107737.
Council of Science Editors:
Xu J. Ultrathin and Tunable Graphene Oxide Membranes for Pressure Driven Water Filtration. [Masters Thesis]. Rice University; 2016. Available from: http://hdl.handle.net/1911/107737
Delft University of Technology
20.
van Dijk, Tim (author).
Assessment of Fe(II), Fe(III) and NaMnO4 dosing for As removal <1 µg/L during aeration-filtration at WTP Prinsenbosch.
Degree: 2018, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:098c234e-81f7-4a70-9528-5484d9ff4c49
► In 2013, Brabant Water (BW) adopted a new goal of <1 μg/l for As level in the drinking water, resulting in the need to enhance…
(more)
▼ In 2013, Brabant
Water (BW) adopted a new goal of <1 μg/l for As level in the drinking
water, resulting in the need to enhance As removal at seven
water treatment plants (WPT’s), including WTP Prinsenbosch (As = 2.6 μg/l). Earlier experiences of BW at WTP Dorst had shown that dosing of NaMnO4 to an aeration-filtration system efficiently reduces As concentrations. However, the so-called AOCF method had undesired operational side-effects, including decreased filter run time, breakthrough of particles and poor thickening of backwash sludge. The aim of this thesis was to investigate 3 process alternatives (respectively dosing of NaMnO4, Fe(III) and Fe(II)) to enhance the As removal to < 1 μg/l at WTP Prinsenbosch, specifically including the impact on operational aspects like the filtration process and the backwash
water production and sludge properties. The assessment is based on the results of (full-scale and) pilot-plant research at WTP Prinsenbosch. It was found that Fe(III) was slightly more effective than Fe(II) and NaMnO4 for the removal of As, but at doses of 1.3 mg/l NaMnO4, 0.7 mg/l Fe(III) or 1.2 mg /l Fe(II) a drinking
water quality of 0.7 μg As/l could be obtained with all 3 chemicals. In rapid sand filters, As(III) is oxidized biologically leading to subsequent adsorption of As(V) onto Fe(III)oxyhydroxides and Mn(IV) oxides. It was found that the adsorption capacity of the filter precipitates was relatively high, because to obtain a concentration of 0.7 μg As/l, the acceptable adsorption load was between 1.4-1.7 μg As/ mg (Fe+Mn). Although As removal was similar for dosing either 1.3 mg/l NaMnO4, 0.7 mg/l Fe(III) or 1.2 mg /l Fe(II), the impact on the filtration process and the backwash
water production and sludge properties proved to be quite different. Dosing of NaMnO4 and Fe(III) led to shorter filter run times, increased vulnerability to breakthrough, higher backwash
water production and reduced thickening of the sludge. Contrarily, dosing of Fe(II) and the reference case (without dosing) led to longer run times, no breakthrough, lower backwash
water production and superior thickening of the sludge. The differences in the impact on the filtration process and sludge properties between Fe(II) and Fe(III) and NaMnO4 are most likely explained by a different density of the Fe(III)oxyhydroxides and Mn(IV) oxides formed in the filter. The different density may be related to the formation process (biotic or abiotic oxidation of Fe and Mn, homogeneous or heterogeneous precipitation of Fe(III)oxyhydroxides and Mn(IV) oxides) and the crystal structure and density (which may be influenced by Eh and pH). The conclusion of the research for WTP Prinsenbosch is that Fe(II) is the preferred chemical in view of the superior operational aspects. It is also cheaper than NaMnO4 (both chemical costs and sludge disposal costs) and easier to handle.
Advisors/Committee Members: van Halem, Doris (mentor), Rietveld, Luuk (mentor), van de Wetering, T.S.C.M. (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: water treatment; Arsenic; aeration; filtration
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
van Dijk, T. (. (2018). Assessment of Fe(II), Fe(III) and NaMnO4 dosing for As removal <1 µg/L during aeration-filtration at WTP Prinsenbosch. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:098c234e-81f7-4a70-9528-5484d9ff4c49
Chicago Manual of Style (16th Edition):
van Dijk, Tim (author). “Assessment of Fe(II), Fe(III) and NaMnO4 dosing for As removal <1 µg/L during aeration-filtration at WTP Prinsenbosch.” 2018. Masters Thesis, Delft University of Technology. Accessed March 02, 2021.
http://resolver.tudelft.nl/uuid:098c234e-81f7-4a70-9528-5484d9ff4c49.
MLA Handbook (7th Edition):
van Dijk, Tim (author). “Assessment of Fe(II), Fe(III) and NaMnO4 dosing for As removal <1 µg/L during aeration-filtration at WTP Prinsenbosch.” 2018. Web. 02 Mar 2021.
Vancouver:
van Dijk T(. Assessment of Fe(II), Fe(III) and NaMnO4 dosing for As removal <1 µg/L during aeration-filtration at WTP Prinsenbosch. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Mar 02].
Available from: http://resolver.tudelft.nl/uuid:098c234e-81f7-4a70-9528-5484d9ff4c49.
Council of Science Editors:
van Dijk T(. Assessment of Fe(II), Fe(III) and NaMnO4 dosing for As removal <1 µg/L during aeration-filtration at WTP Prinsenbosch. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:098c234e-81f7-4a70-9528-5484d9ff4c49
Delft University of Technology
21.
Maggioni, Paolo (author).
Upscaling thin film solar cells for water treatment devices.
Degree: 2018, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:a0be333b-1ae4-4fcf-9c2a-45b138ae4458
► The availability of clean drinking water and various energy sources has always been taken for granted and considered to be infinite throughout human history. However,…
(more)
▼ The availability of clean drinking
water and various energy sources has always been taken for granted and considered to be infinite throughout human history. However, nowadays, we have reached a historical moment in which we are over-exploiting the Earth's resources. The reduction of the high level of pollution in the air and in the
water is one of the main challenges that the next generations will have to face. Photovoltaic technologies offer a clean and cheap solution for both
water purification and hydrogen generation for energy storage. The main goal of this thesis is to upscale lab-scale thin film solar cells, by a factor of 600, optimized for
water treatment devices. To this end, two alternative solutions have been explored. On the one hand, a metallic front contact grid has been designed to minimize the power losses in large area pin superstrate solar cells. On the other hand, a thin film mini-module has been manufactured by isolating small area nip substrate solar cells and connecting them in parallel. The implementation of the front metallic grid has enabled the upscaling of pin superstrate amorphous silicon solar cells by a factor of around 10. Additionally, the laser ablation process needed for dividing the sample into multiple cells has been studied and optimized for nip substrate amorphous silicon devices. Finally, some of the major problems that cause the formation of shunts have been identified. However, the relatively high density of shunts through the amorphous silicon bulk prevents the device from achieving higher efficiencies at larger dimensions.
Advisors/Committee Members: Smets, Arno (mentor), de Vrijer, Thierry (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: Thin; film; upscaling; water; Treatment
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Maggioni, P. (. (2018). Upscaling thin film solar cells for water treatment devices. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:a0be333b-1ae4-4fcf-9c2a-45b138ae4458
Chicago Manual of Style (16th Edition):
Maggioni, Paolo (author). “Upscaling thin film solar cells for water treatment devices.” 2018. Masters Thesis, Delft University of Technology. Accessed March 02, 2021.
http://resolver.tudelft.nl/uuid:a0be333b-1ae4-4fcf-9c2a-45b138ae4458.
MLA Handbook (7th Edition):
Maggioni, Paolo (author). “Upscaling thin film solar cells for water treatment devices.” 2018. Web. 02 Mar 2021.
Vancouver:
Maggioni P(. Upscaling thin film solar cells for water treatment devices. [Internet] [Masters thesis]. Delft University of Technology; 2018. [cited 2021 Mar 02].
Available from: http://resolver.tudelft.nl/uuid:a0be333b-1ae4-4fcf-9c2a-45b138ae4458.
Council of Science Editors:
Maggioni P(. Upscaling thin film solar cells for water treatment devices. [Masters Thesis]. Delft University of Technology; 2018. Available from: http://resolver.tudelft.nl/uuid:a0be333b-1ae4-4fcf-9c2a-45b138ae4458
Delft University of Technology
22.
Wilders, J.A. (author).
Reflow The Kampung.
Degree: 2016, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:6fab5ee2-5dd4-49fc-af98-a1b0da9045e9
A Urban plan for new water and waste flows in the Kampungs of Bandung, Indonesia.
AE
Architectural Engineering and Technology
Architecture and The Built Environment
Advisors/Committee Members: Smit, M. (mentor), Jongert, J. (mentor), Meijs, M.H. (mentor).Subjects/Keywords: kampung; water treatment; waste management
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wilders, J. A. (. (2016). Reflow The Kampung. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:6fab5ee2-5dd4-49fc-af98-a1b0da9045e9
Chicago Manual of Style (16th Edition):
Wilders, J A (author). “Reflow The Kampung.” 2016. Masters Thesis, Delft University of Technology. Accessed March 02, 2021.
http://resolver.tudelft.nl/uuid:6fab5ee2-5dd4-49fc-af98-a1b0da9045e9.
MLA Handbook (7th Edition):
Wilders, J A (author). “Reflow The Kampung.” 2016. Web. 02 Mar 2021.
Vancouver:
Wilders JA(. Reflow The Kampung. [Internet] [Masters thesis]. Delft University of Technology; 2016. [cited 2021 Mar 02].
Available from: http://resolver.tudelft.nl/uuid:6fab5ee2-5dd4-49fc-af98-a1b0da9045e9.
Council of Science Editors:
Wilders JA(. Reflow The Kampung. [Masters Thesis]. Delft University of Technology; 2016. Available from: http://resolver.tudelft.nl/uuid:6fab5ee2-5dd4-49fc-af98-a1b0da9045e9
University of Texas – Austin
23.
Rose, Heather.
A study on the interdependency of hydroponic wastewater quality and the energy and costs for onsite treatment.
Degree: MSin Energy and Earth Resources, Energy and Earth Resources, 2020, University of Texas – Austin
URL: http://dx.doi.org/10.26153/tsw/10171
► Hydroponic growing methods have the potential to use less water while producing higher yields when compared to traditional soil-based agriculture. However, hydroponic wastewater is a…
(more)
▼ Hydroponic growing methods have the potential to use less
water while producing higher yields when compared to traditional soil-based agriculture. However, hydroponic wastewater is a nutrient dense effluent that can be harmful to the environment if not managed properly. Onsite
treatment and reuse of hydroponic wastewater would avoid thousands of gallons a month of freshwater use while preventing this effluent from harming receiving streams. The efficacy, energy requirements and costs of some
treatment methods are not well known. To assess the efficacy of select
treatment methods, the contaminants in hydroponic wastewater were measured using samples of hydroponic wastewater collected from a greenhouse test facility and analyzed by an environmental laboratory. Contaminants evaluated were Total Dissolved Solids (TDS), calcium, potassium, magnesium, total phosphorus, nitrogen, and Total Organic Carbon (TOC). Wastewater samples were also treated onsite using a sand filter, a granular activated carbon (GAC) filter, and reverse osmosis (RO). Samples of wastewater treated by these methods were then re-analyzed by the environmental laboratory and post-
treatment concentrations of the studied contaminants were recorded. Sand and GAC filtration were shown to be essentially ineffective for contaminant removal due to the high concentrations of metals in the hydroponic wastewater. Reverse osmosis was the most effective
treatment method, removing an average of 85% TDS concentration in wastewater samples. The results from the
water quality analysis showed that Reverse Osmosis was the only
treatment method that effectively removed the large concentration of metal contaminants in the wastewater. For this reason, only reverse osmosis was analyzed for energy and cost requirements for onsite
treatment of hydroponic wastewater. The energy requirements to treat hydroponic wastewater onsite by reverse osmosis ranged from 3 to 43 kWh per day, depending on the facility size and percent of
water treated. The annualized cost of
treatment ranged from 0.63 to 2.83 per thousand gallons of
water treated. Finally, a cost savings from reduced
water bills analysis was also performed using local
water utility prices in Austin TX. Based on the assumptions made for
water meter size and monthly
water use, it was found that financial savings could be achieved in all facility sizes with a payback period of 7 to 24 months if facilities utilized municipal
water as their
water source. These results can help to determine whether recycling hydroponic wastewater is feasible within financial and energy constraints as a way to avoid discharging harmful effluent and using thousands of gallons of source
water each month.
Advisors/Committee Members: Faust, Kasey M. (advisor), Webber, Michael E., 1971- (advisor).
Subjects/Keywords: Hydroponic wastewater; Onsite water treatment
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Rose, H. (2020). A study on the interdependency of hydroponic wastewater quality and the energy and costs for onsite treatment. (Masters Thesis). University of Texas – Austin. Retrieved from http://dx.doi.org/10.26153/tsw/10171
Chicago Manual of Style (16th Edition):
Rose, Heather. “A study on the interdependency of hydroponic wastewater quality and the energy and costs for onsite treatment.” 2020. Masters Thesis, University of Texas – Austin. Accessed March 02, 2021.
http://dx.doi.org/10.26153/tsw/10171.
MLA Handbook (7th Edition):
Rose, Heather. “A study on the interdependency of hydroponic wastewater quality and the energy and costs for onsite treatment.” 2020. Web. 02 Mar 2021.
Vancouver:
Rose H. A study on the interdependency of hydroponic wastewater quality and the energy and costs for onsite treatment. [Internet] [Masters thesis]. University of Texas – Austin; 2020. [cited 2021 Mar 02].
Available from: http://dx.doi.org/10.26153/tsw/10171.
Council of Science Editors:
Rose H. A study on the interdependency of hydroponic wastewater quality and the energy and costs for onsite treatment. [Masters Thesis]. University of Texas – Austin; 2020. Available from: http://dx.doi.org/10.26153/tsw/10171
University of Minnesota
24.
Isaacson, Kristofer.
Comparison of Biofiltration Media in Treating Industrial Stormwater Runoff.
Degree: MS, Chemical Engineering, 2019, University of Minnesota
URL: http://hdl.handle.net/11299/206704
► Biofiltration systems have become one of the most commonly used best management practices in dealing with stormwater runoff. Stormwater runoff is inherently variable, with the…
(more)
▼ Biofiltration systems have become one of the most commonly used best management practices in dealing with stormwater runoff. Stormwater runoff is inherently variable, with the contaminants present depending greatly on the land use of the catchment basin. This study characterized the stormwater collected from an industrial site in northeastern Minnesota. It was determined the pollutants of concern for this site are dissolved heavy metals (Aluminum, Copper, Iron) and bacteria. Different media exhibit different strengths and weaknesses in the removal of pollutants in these biofiltration systems. As a result, there is not a universal combination of media that can adequately treat all stormwater. 18 bio-based media were tested in batch experiments to determine if they possessed any capacity for heavy metal removal. Eight media (APTsorb, bioAPT, biochar, marble, sand, vermiculite, and zeolite) that showed good removal were studied further in downward flowing column experiments. These column experiments determined that all materials demonstrated some capacity for dissolved metal removal with the exception of sand. However, marble performed the best by a significant margin, removing over 10 mg/cm3 of iron, 4 mg/cm3 of aluminum, and 2 mg/cm3 of copper. The four materials that were determined to have the largest removal capacity for heavy metals (APTsorb, compost, marble, zeolite) were tested in an additional column experiment in which the synthetic stormwater was inoculated with E. coli. Marble again performed the best removing 100% of E. coli throughout the duration of a 56-hour continuous flow column experiment. This characterization process provides valuable information on the effectivity and longevity of a variety of media in the design of future biofiltration systems.
Subjects/Keywords: Biofiltration; Stormwater; Treatment; Water
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Isaacson, K. (2019). Comparison of Biofiltration Media in Treating Industrial Stormwater Runoff. (Masters Thesis). University of Minnesota. Retrieved from http://hdl.handle.net/11299/206704
Chicago Manual of Style (16th Edition):
Isaacson, Kristofer. “Comparison of Biofiltration Media in Treating Industrial Stormwater Runoff.” 2019. Masters Thesis, University of Minnesota. Accessed March 02, 2021.
http://hdl.handle.net/11299/206704.
MLA Handbook (7th Edition):
Isaacson, Kristofer. “Comparison of Biofiltration Media in Treating Industrial Stormwater Runoff.” 2019. Web. 02 Mar 2021.
Vancouver:
Isaacson K. Comparison of Biofiltration Media in Treating Industrial Stormwater Runoff. [Internet] [Masters thesis]. University of Minnesota; 2019. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/11299/206704.
Council of Science Editors:
Isaacson K. Comparison of Biofiltration Media in Treating Industrial Stormwater Runoff. [Masters Thesis]. University of Minnesota; 2019. Available from: http://hdl.handle.net/11299/206704
University of Guelph
25.
Levesque, Serge.
Comparative Analyses of Conventional and Novel Water Treatment Technologies for Recirculating Greenhouse Fertigation Solutions.
Degree: MS, School of Environmental Sciences, 2019, University of Guelph
URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/17460
► The reuse of irrigation water allows greenhouse growers to reduce the amount of water and fertilizer used for the development of their crops. Although, there…
(more)
▼ The reuse of irrigation
water allows greenhouse growers to reduce the amount of
water and fertilizer used for the development of their crops. Although, there are barriers that limit the widespread adoption of
water recirculation which include the proliferation of plant pathogens, accumulation of phytotoxic chemical contaminants and nutrient imbalances. To address these issues,
water treatment technologies are needed to disinfect and/or degrade chemical contaminants in order to recirculate irrigation
water. The use of electrochemical systems for treating fertigation solutions was explored for overcoming their compatibility in recirculating hydroponics.
Studies were performed with a head to head comparison using conventional and novel
water treatment technologies for treating fertigation
water. All
treatment technologies were effective at removing biological and chemical contaminants by varying degrees. Furthermore, greenhouse trials determined that electrochemical
water treatment was suitable for cultivating Cyclamen persicum with recirculating the fertigation solution through drip irrigation.
Advisors/Committee Members: Dixon, Mike (advisor).
Subjects/Keywords: Electrochemistry; Fertigation; Pathogens; Water treatment
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Levesque, S. (2019). Comparative Analyses of Conventional and Novel Water Treatment Technologies for Recirculating Greenhouse Fertigation Solutions. (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/17460
Chicago Manual of Style (16th Edition):
Levesque, Serge. “Comparative Analyses of Conventional and Novel Water Treatment Technologies for Recirculating Greenhouse Fertigation Solutions.” 2019. Masters Thesis, University of Guelph. Accessed March 02, 2021.
https://atrium.lib.uoguelph.ca/xmlui/handle/10214/17460.
MLA Handbook (7th Edition):
Levesque, Serge. “Comparative Analyses of Conventional and Novel Water Treatment Technologies for Recirculating Greenhouse Fertigation Solutions.” 2019. Web. 02 Mar 2021.
Vancouver:
Levesque S. Comparative Analyses of Conventional and Novel Water Treatment Technologies for Recirculating Greenhouse Fertigation Solutions. [Internet] [Masters thesis]. University of Guelph; 2019. [cited 2021 Mar 02].
Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/17460.
Council of Science Editors:
Levesque S. Comparative Analyses of Conventional and Novel Water Treatment Technologies for Recirculating Greenhouse Fertigation Solutions. [Masters Thesis]. University of Guelph; 2019. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/17460
University of New South Wales
26.
Choo, Florence.
Application of in situ fluorometers for monitoring algal blooms in water supply systems: potential for real time treatment validation and reactive chemical adjustment.
Degree: Chemical Engineering, 2019, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/63966
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:61394/SOURCE02?view=true
► Cyanobacterial blooms are a concern for water utilities due to the potential production of cyanotoxins and taste and odours. Current detection methods are slow and…
(more)
▼ Cyanobacterial blooms are a concern for
water utilities due to the potential production of cyanotoxins and taste and odours. Current detection methods are slow and may not capture changes in bloom density which can prevent utilities in rapidly adjusting their
treatment process. This project investigated using in situ fluorometers as a tool for real-time cyanobacteria monitoring and
treatment adjustment. Four fluorometers were evaluated using different counts of cyanobacterial and green algal species to: 1) calibrate the fluorometers, 2) determine limit of detections, 3) quantify the measurement bias during simulated bloom events and 4) develop a correction method for chlorophyll-a interference based on the fluorometer response. Bench-scale and pilot trials were undertaken with fluorometers to determine the optimal
treatment dose for the simulated bloom. Fluorometer accuracy was evaluated at 11
treatment plants to determine the suitability as a field detection tool. Finally, fluorometers were deployed at critical control points of 3
treatment plants for real-time monitoring.Significant correlations were found between the phycocyanin response and cyanobacterial numbers for all fluorometers tested. The detection limits varied depending on the fluorometer and species tested. Green algae addition caused fluorometer measurement error to increase; the developed correction reduced the measurement error for almost all the fluorometers and species tested by 21% to 99%. Correction factors applied in the field reduced fluorometer measurement errors at sites that were dominated by a single cyanobacterial species, validating the protocol. Fluorometers tracked the growth phases of three cyanobacteria species based on cell count validation at the bench-scale. The calculated removal efficiencies were comparable between fluorometer measurements and cell counts (r > 0.85) for three cyanobacterial species. The optimal coagulant and PAC dose was determined for the simulated blooms. The fluorometers can track cyanobacterial trends throughout the critical control points during the pilot trials. Good correlation (r = 0.6) was found between corrected field fluorometer response and routine monitoring data; fluorometers detected the cyanobacterial cells entering the
treatment plant in real-time. Fluorometers have a huge potential for cyanobacterial monitoring from the source and into
treatment plants and as an aid for real-time chemical dose adjustment.
Advisors/Committee Members: Henderson, Rita, Chemical Engineering, Faculty of Engineering, UNSW, Stuetz, Richard, Civil & Environmental Engineering, Faculty of Engineering, UNSW, Zamyadi, Arash, Civil & Environmental Engineering, Faculty of Engineering, UNSW.
Subjects/Keywords: Fluorescence; Cyanobacteria; Water treatment
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Choo, F. (2019). Application of in situ fluorometers for monitoring algal blooms in water supply systems: potential for real time treatment validation and reactive chemical adjustment. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/63966 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:61394/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Choo, Florence. “Application of in situ fluorometers for monitoring algal blooms in water supply systems: potential for real time treatment validation and reactive chemical adjustment.” 2019. Doctoral Dissertation, University of New South Wales. Accessed March 02, 2021.
http://handle.unsw.edu.au/1959.4/63966 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:61394/SOURCE02?view=true.
MLA Handbook (7th Edition):
Choo, Florence. “Application of in situ fluorometers for monitoring algal blooms in water supply systems: potential for real time treatment validation and reactive chemical adjustment.” 2019. Web. 02 Mar 2021.
Vancouver:
Choo F. Application of in situ fluorometers for monitoring algal blooms in water supply systems: potential for real time treatment validation and reactive chemical adjustment. [Internet] [Doctoral dissertation]. University of New South Wales; 2019. [cited 2021 Mar 02].
Available from: http://handle.unsw.edu.au/1959.4/63966 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:61394/SOURCE02?view=true.
Council of Science Editors:
Choo F. Application of in situ fluorometers for monitoring algal blooms in water supply systems: potential for real time treatment validation and reactive chemical adjustment. [Doctoral Dissertation]. University of New South Wales; 2019. Available from: http://handle.unsw.edu.au/1959.4/63966 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:61394/SOURCE02?view=true
Addis Ababa University
27.
Almaz, Shitie.
STATUS OF WATER QUALITY DURING THE DRY SEASON IN THE ADDIS ABABA WATER SUPPLY SYSTEM
.
Degree: 2012, Addis Ababa University
URL: http://etd.aau.edu.et/dspace/handle/123456789/1088
► The water quality and pollution status of the water supply system of the city of Addis Ababa has been studied along three main distribution lines…
(more)
▼ The
water quality and pollution status of the
water supply system of the city of Addis Ababa has
been studied along three main distribution lines representing Gefersa and Legedadi reservoirs
and the Akaki well field starting from raw
water until it reaches the end user (tap
water). The
water quality parameters considered include physical, chemical and bacteriological
characteristics. Electrical conductivity, pH, temperature, FCR and turbidity were measured in
situ. BOD, COD, TC, FC, Na, K, Ca, Mg, total iron, Mn, NO3
-, PO4-P, Cl-, HCO3
-, CO-
3, SO4
2-,
OH- alkalinity and total alkalinity were determined in the laboratory. A total of 69
water samples
were collected for laboratory analysis. In each distribution system samples were collected at four
sites (raw
water, sample immediately after first
treatment, selected site along the distribution line
and finally from end users tap
water). The result displays interesting
water quality changes along
the distribution line. The reservoir raw
water is distinctly different from the groundwater in terms
of total ionic concentration. The latter has higher ionic concentration and nitrate content. The raw
water of Legedadi shows high phosphate content, 416.93 mg/L, probably associated with high
fertilizer usage in its catchment. The very low phosphate content ranged from 0.61 to 11.43 mg/L
in the tap and intermediate reservoir sites indicate the effectiveness of the
treatment system with
coagulation. With regard to bacteriological analysis, the primary data shows that the
water is safe
for drinking. However, secondary records show occasional traces of in the piped
water probably
related to the mix of the
water with sewerage system in older leaking pipes. The Biological
Oxygen Demand and Chemical Oxygen Demand analysis shows that there is some organic
pollution. The range of free chlorine residue was 0.08 - 0.91 mg/L and this assessment indicates
that the added chlorine is not effective everywhere. This can be seen from the detection of total
coliforms in the piped
water. The major anion and cation analysis revealed that all the values are
within the WHO permissible limit for drinking. However, occasional high total iron may lead in
few places to consumer complaints. Calcium and bicarbonate are the main cation and anion,
respectively. The three lines studied may not entirely represent the conditions of the Addis
Ababa
water supply system. It is recommended that more
water sampling and analysis is
required to have a clear picture and trace the source of specific pollution.
Advisors/Committee Members: Mekibib Dawit(Dr.) (advisor).
Subjects/Keywords: Addis Ababa;
pollution;
water quality;
water treatment
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Almaz, S. (2012). STATUS OF WATER QUALITY DURING THE DRY SEASON IN THE ADDIS ABABA WATER SUPPLY SYSTEM
. (Thesis). Addis Ababa University. Retrieved from http://etd.aau.edu.et/dspace/handle/123456789/1088
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Almaz, Shitie. “STATUS OF WATER QUALITY DURING THE DRY SEASON IN THE ADDIS ABABA WATER SUPPLY SYSTEM
.” 2012. Thesis, Addis Ababa University. Accessed March 02, 2021.
http://etd.aau.edu.et/dspace/handle/123456789/1088.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Almaz, Shitie. “STATUS OF WATER QUALITY DURING THE DRY SEASON IN THE ADDIS ABABA WATER SUPPLY SYSTEM
.” 2012. Web. 02 Mar 2021.
Vancouver:
Almaz S. STATUS OF WATER QUALITY DURING THE DRY SEASON IN THE ADDIS ABABA WATER SUPPLY SYSTEM
. [Internet] [Thesis]. Addis Ababa University; 2012. [cited 2021 Mar 02].
Available from: http://etd.aau.edu.et/dspace/handle/123456789/1088.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Almaz S. STATUS OF WATER QUALITY DURING THE DRY SEASON IN THE ADDIS ABABA WATER SUPPLY SYSTEM
. [Thesis]. Addis Ababa University; 2012. Available from: http://etd.aau.edu.et/dspace/handle/123456789/1088
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of the Western Cape
28.
Sirunda, Johannes Jaime.
The effects of water transfer from Swakoppoort and Omatako Dams on the water quality of Von Bach Dam, Namibia
.
Degree: 2011, University of the Western Cape
URL: http://hdl.handle.net/11394/5413
► In the Otjozondjupa Region, Namibia, water is transferred from Swakoppoort and Omatako Dams into Von Bach Dam to limit evaporation losses and bring water closer…
(more)
▼ In the Otjozondjupa Region, Namibia,
water is transferred from Swakoppoort and Omatako Dams into Von Bach Dam to limit evaporation losses and bring
water closer to the purification plant. There is a gap in the knowledge about the effects on
water quality in Von Bach Dam due to
water transfer from Swakoppoort and Omatako Dams, as previous studies on such aspects in the area do not exist. The study objective was to; (a) characterise
water quality of the three dams, (b) determine whether
water transfers affect the
water quality of Von Bach Dam, (c) determine if the
treatment of
water abstracted from Von Bach Dam for potable
water supply has been influenced by
water quality changes arising from
water transfers. Four sampling locations were established in Von Bach Dam, one in Swakoppoort Dam, and one in Omatako Dam.
Water samples were collected in these three dams weekly. Two senior officers responsible for
water treatment were interviewed about possible
water treatment problems arising from the
water transfer. Descriptive statistics, ANOVA and correlation were carried out to analyse the data. The results showed that, secchi disk depths, total phosphorus, orthophosphate, ammonia, dissolved organic carbon, chlorophyll a and microcystis were statistically different in the three dams at a 5% significance level. Upstream land uses, geology of the catchment and
water stratification are likely to influence the
water quality in the three dams. During
water transfers into Von Bach Dam, secchi disk depths, turbidity, dissolved oxygen, iron, total phosphorus, ammonia (NH₄-N) and chlorophyll a were statistically different at a 5% significance level at all the four sampling locations within this dam. These differences are due to the influence of
water transfers. The influence of
water transfers on
water quality was localised at the discharge points SL4 (at the inflow of Von Bach Dam) and SL1 (at the outflow of Von Bach Dam).
Water treatment problems due to high ammonia, dissolved organic carbon, and turbidity in the
water abstracted from Von Bach Dam occurred during
water transfers and runoff from the catchment. This view was supported by the study findings.
Advisors/Committee Members: Mazvimavi, Dominic (advisor).
Subjects/Keywords: Water quality;
Water treatment;
Eutrophication;
Algal blooms
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sirunda, J. J. (2011). The effects of water transfer from Swakoppoort and Omatako Dams on the water quality of Von Bach Dam, Namibia
. (Thesis). University of the Western Cape. Retrieved from http://hdl.handle.net/11394/5413
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sirunda, Johannes Jaime. “The effects of water transfer from Swakoppoort and Omatako Dams on the water quality of Von Bach Dam, Namibia
.” 2011. Thesis, University of the Western Cape. Accessed March 02, 2021.
http://hdl.handle.net/11394/5413.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sirunda, Johannes Jaime. “The effects of water transfer from Swakoppoort and Omatako Dams on the water quality of Von Bach Dam, Namibia
.” 2011. Web. 02 Mar 2021.
Vancouver:
Sirunda JJ. The effects of water transfer from Swakoppoort and Omatako Dams on the water quality of Von Bach Dam, Namibia
. [Internet] [Thesis]. University of the Western Cape; 2011. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/11394/5413.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sirunda JJ. The effects of water transfer from Swakoppoort and Omatako Dams on the water quality of Von Bach Dam, Namibia
. [Thesis]. University of the Western Cape; 2011. Available from: http://hdl.handle.net/11394/5413
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Arizona
29.
Azadiaghdam, Mojtaba.
Salts in the Air and Water Understanding their Formation Mechanism, Reactions and their Advantages and Disadvantages
.
Degree: 2019, University of Arizona
URL: http://hdl.handle.net/10150/634292
► This study utilizes multiple aerosol datasets collected in Metro Manila, Philippines to investigate sea salt aerosol characteristics. This coastal megacity allows for an examination of…
(more)
▼ This study utilizes multiple aerosol datasets collected in Metro Manila, Philippines to investigate sea salt aerosol characteristics. This coastal megacity allows for an examination of the impacts of precipitation and mixing of different air masses on sea salt properties, including overall concentration and size-resolved composition, hygroscopicity, and morphology. Intensive size-resolved measurements with a Micro-Orifice Uniform Deposit Impactor (MOUDI) between July-December 2018 revealed the following major results: (i) sea salt levels exhibit wide variability during the wet season, driven primarily by precipitation; (ii) ssNa+ and Cl- peaked in concentration between 1.8 – 5.6 µm, with Cl- depletion varying between 21.3 - 90.7%; (iii) mixing of marine and anthropogenic air masses yielded complex non-spherical shapes with species attached to the outer edges and Na+ uniformly distributed across particles unlike Cl-; (iv) there was significant contamination of sea salt aerosol by a variety of crustal and anthropogenic pollutants (Fe, Al, Ba, Mn, Pb, NO_3^-, V, Zn, NH_4^+); (v) categorization of samples in five different pollutant type categories (Background, Clean, Fire, Continental Pollution and Highest Rain) revealed significant differences in overall Cl- depletion with enhanced depletion in the submicrometer range versus the supermicrometer range; (vi) κ values ranged from 0.02 to 0.31 with a bimodal profile across all stages, with the highest value coincident with the highest sea salt volume fraction in the 3.2-5.6 µm stage, which is far lower than pure sea salt due to the significant influence of organics and black carbon. Analysis of longer term PM2.5 (particulate matter with aerodynamic diameter less than 2.5 µm) and PMcoarse (= PM10 – PM2.5) data between August 2005 and October 2007 confirmed findings from the MOUDI data that more Cl- depletion occurred both in the wet season versus the dry season and on weekdays versus weekend days.
The effectiveness of three different pretreatment processes (Fluidized bed crystallization reactor, Ultrafiltration and ferric chloride coagulation and flocculation) in order to remove scale-forming and fouling substances from the wastewater secondary effluent were studied. At optimized conditions, fluidized bed crystallization reactor (FBCR) was able to remove >99.9% of magnesium, 97% of calcium and 42% of silica while ultrafiltration (UF) and ferric chloride coagulation were only able to remove 18% and 16% of the silica concentration, respectively. UF was also able to reduce the turbidity of the SE by 93%. Furthermore, the co-precipitation of different mineral salts with organic matter were also discussed using size exclusion chromatography-organic carbon detector (SEC-OCD). At optimized conditions, ferric chloride resulted in the highest natural organic matter (NOM) reduction (56%) compared to FBCR (26%) and UF (13%). Excitation emission matrix-parallel factor (EEM-PARAFAC) analysis were used to characterize the NOM in the SE and the effluent of these pretreatments. Five…
Advisors/Committee Members: Farrell, James (advisor), Sorooshian, Armin (advisor), Hickenbottom, Kerri (committeemember), Achilli, Andrea (committeemember).
Subjects/Keywords: aerosol;
chloride depletion;
water;
water treatment
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Azadiaghdam, M. (2019). Salts in the Air and Water Understanding their Formation Mechanism, Reactions and their Advantages and Disadvantages
. (Doctoral Dissertation). University of Arizona. Retrieved from http://hdl.handle.net/10150/634292
Chicago Manual of Style (16th Edition):
Azadiaghdam, Mojtaba. “Salts in the Air and Water Understanding their Formation Mechanism, Reactions and their Advantages and Disadvantages
.” 2019. Doctoral Dissertation, University of Arizona. Accessed March 02, 2021.
http://hdl.handle.net/10150/634292.
MLA Handbook (7th Edition):
Azadiaghdam, Mojtaba. “Salts in the Air and Water Understanding their Formation Mechanism, Reactions and their Advantages and Disadvantages
.” 2019. Web. 02 Mar 2021.
Vancouver:
Azadiaghdam M. Salts in the Air and Water Understanding their Formation Mechanism, Reactions and their Advantages and Disadvantages
. [Internet] [Doctoral dissertation]. University of Arizona; 2019. [cited 2021 Mar 02].
Available from: http://hdl.handle.net/10150/634292.
Council of Science Editors:
Azadiaghdam M. Salts in the Air and Water Understanding their Formation Mechanism, Reactions and their Advantages and Disadvantages
. [Doctoral Dissertation]. University of Arizona; 2019. Available from: http://hdl.handle.net/10150/634292
Clemson University
30.
Zhang, Bin.
REMOVAL OF TiO2 NANOPARTICLES BY CONVENTIONAL WATER TREATMENT PROCESSES.
Degree: MS, Environmental Engineering, 2013, Clemson University
URL: https://tigerprints.clemson.edu/all_theses/1768
► Titanium dioxide nanoparticles (TiO2 NPs) are one of the most common nanomaterials used in nano based products. They are used as antimicrobial, antibiotic, and…
(more)
▼ Titanium dioxide nanoparticles (TiO
2 NPs) are one of the most common nanomaterials used in nano based products. They are used as antimicrobial, antibiotic, and antifungal agents, ultraviolet (UV) blockers, antiscratch additives, and catalysts, because TiO
2 NPs have high specific surface area and sorption capacity for ionic and nonionic species, and ultraviolet (UV) reflecting capabilities. However, TiO
2 NPs could enter human body through skin, food, inhalation and drinking
water, and cause potential adverse effect, including production of oxidation radicals, genotoxic effects, and inflammation and neurotoxic effects.
The main objective of this study was to examine the efficiency of conventional drinking
water treatment processes (coagulation, flocculation, sedimentation, and filtration) in removing the TiO
2 NPs, since potable
water consumption is one of the possible pathways for the NPs to enter the human body. In the absence of regulations, drinking
water treatment plants are currently not designed and operated for the removal of NPs. Moreover, there are limited numbers of studies regarding the removal of NPs using conventional
treatment process in the literature.
A systematic experimental investigation was conducted to understand the effects of initial TiO
2 NP concentration, the TiO
2 NP coating, different coagulants (alum vs. ferric chloride), pH and the presence of natural organic matter (NOM) on the removal of TiO
2 NPs.
Results showed higher degree of TiO
2 NP removal with increasing TiO
2 concentration from 0.5 mg/L to 5 mg/L. For 90% removal of uncoated TiO
2 NP, 10 and 40 mg/L of alum were required at pH 6.5 in distilled and de-ionized (DDI)
water, respectively. Better removal of uncoated than SiO
2 coated TiO
2 NPs was also observed. The performance of alum (Al
2(SO
4)3·18H
2O) and ferric chloride(FeCl3) were similar (90% removal at 120 mg/L coagulant in Hanahan
water at pH 6.5), but ferric chloride was better for NOM removal (40% vs. 30% at 80 mg/L coagulant and pH 6.5). NOM had a significant effect on the removal of NPs. The presence of NOM increased the required alum dose from 20 mg/L in DDI
water to 80 mg/L in a 3 mg TOC/L model NOM
water to accomplish 85% removal of the NPs. The pH of 5.8 resulted in higher removals of TiO
2, turbidity and TOC as compared to pH of 6.5. For TOC removal, 60% was achieved at 60 mg/L alum in pH 5.8 solution, while 31% was removed at pH 6.5, which is related to the properties of NPs, coagulants and NOM.
Overall, this study showed the effect of different factors (initial TiO
2 NP concentration, TiO
2 NP coating, natural organic matter/natural waters, pH and coagulant type) on the removal of TiO
2 NPs from
water during conventional drinking
water treatment processes. Although conventional
treatment processes appear to be effective in removing NPs, it was…
Advisors/Committee Members: Karanfil, Tanju, Lee, Cindy M, Ladner, David A.
Subjects/Keywords: drinking water treatment; natural water; TiO2 nanoparticle
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zhang, B. (2013). REMOVAL OF TiO2 NANOPARTICLES BY CONVENTIONAL WATER TREATMENT PROCESSES. (Masters Thesis). Clemson University. Retrieved from https://tigerprints.clemson.edu/all_theses/1768
Chicago Manual of Style (16th Edition):
Zhang, Bin. “REMOVAL OF TiO2 NANOPARTICLES BY CONVENTIONAL WATER TREATMENT PROCESSES.” 2013. Masters Thesis, Clemson University. Accessed March 02, 2021.
https://tigerprints.clemson.edu/all_theses/1768.
MLA Handbook (7th Edition):
Zhang, Bin. “REMOVAL OF TiO2 NANOPARTICLES BY CONVENTIONAL WATER TREATMENT PROCESSES.” 2013. Web. 02 Mar 2021.
Vancouver:
Zhang B. REMOVAL OF TiO2 NANOPARTICLES BY CONVENTIONAL WATER TREATMENT PROCESSES. [Internet] [Masters thesis]. Clemson University; 2013. [cited 2021 Mar 02].
Available from: https://tigerprints.clemson.edu/all_theses/1768.
Council of Science Editors:
Zhang B. REMOVAL OF TiO2 NANOPARTICLES BY CONVENTIONAL WATER TREATMENT PROCESSES. [Masters Thesis]. Clemson University; 2013. Available from: https://tigerprints.clemson.edu/all_theses/1768
◁ [1] [2] [3] [4] [5] … [67] ▶
. 
Open Access Theses and Dissertations