You searched for subject:(Activated carbon).
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Virginia Tech
1.
Tamakloe, Senam.
Novel Synthesis of Bulk Nanocarbon (BNC).
Degree: MS, Materials Science and Engineering, 2020, Virginia Tech
URL: http://hdl.handle.net/10919/99289 
► Wood, shells, and plant seeds are examples of organic precursors. When organic precursors are carbonized, they can become very porous, nanostructured, and hard, but deliver…
(more)
▼ Wood, shells, and plant seeds are examples of organic precursors. When organic precursors are carbonized, they can become very porous, nanostructured, and hard, but deliver pure mechanical properties because of their porosities. A selected organic precursor was carbonized, in an attempt, to produce a bulk material with much less porosity for possible use in structural applications such as reinforcement in metal and polymer matrices. A bulk nanocarbon (BNC) material was made using high energy ball milling and the carbonization of corn cob (the selected organic precursor). This bulk material revealed both micro and nano-porosities, and a young's modulus of 120 GPa, about ten times that of extruded graphite.
Advisors/Committee Members: Aning, Alexander O. (committeechair), Suchicital, Carlos T. A. (committee member), Reynolds, William T. (committee member).
Subjects/Keywords: Activated carbon; carbon nanomaterials
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APA (6th Edition):
Tamakloe, S. (2020). Novel Synthesis of Bulk Nanocarbon (BNC). (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/99289
Chicago Manual of Style (16th Edition):
Tamakloe, Senam. “Novel Synthesis of Bulk Nanocarbon (BNC).” 2020. Masters Thesis, Virginia Tech. Accessed April 11, 2021.
http://hdl.handle.net/10919/99289.
MLA Handbook (7th Edition):
Tamakloe, Senam. “Novel Synthesis of Bulk Nanocarbon (BNC).” 2020. Web. 11 Apr 2021.
Vancouver:
Tamakloe S. Novel Synthesis of Bulk Nanocarbon (BNC). [Internet] [Masters thesis]. Virginia Tech; 2020. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/10919/99289.
Council of Science Editors:
Tamakloe S. Novel Synthesis of Bulk Nanocarbon (BNC). [Masters Thesis]. Virginia Tech; 2020. Available from: http://hdl.handle.net/10919/99289
Cape Peninsula University of Technology
2.
Deist, Heino.
A dynamic CIP/CIL process simulation using MATLAB SIMULINK
.
Degree: 2008, Cape Peninsula University of Technology
URL: http://etd.cput.ac.za/handle/20.500.11838/1923
► ABSTRACT Carbon-in-pulp (CIP) technology is firmly entrenched in the mining sector due to numerous advances in the last few decades. CIP technology recovers complexed gold…
(more)
▼ ABSTRACT
Carbon-in-pulp (CIP) technology is firmly entrenched in the mining sector due to
numerous advances in the last few decades. CIP technology recovers
complexed gold in solution from slurry streams by contacting the pulp with
carbon and separating the two by screening. The carbon-in-leach (CIL) process,
where the pulp contains free cyanide, is closely related to CIP. Both these
processes, especially CIL, are complex and are governed by a number of
interacting unit processes. The overall process efficiency is dependant on a large
number of variables, making the process difficult to optimize.
This study uses simple adsorption and leaching rate equations in order to predict
dynamic CIL/CIP plant performance under varying operating conditions. This will
assist plant metallurgists to achieve optimum efficiency, highlight plant sensitivity
to certain variables and will ultimately result in proactive process control. Various
assumptions were made in order to keep the modeling considerations as simple
and realistic as possible. The process was assumed to have linear kinetic and
equilibrium operation. The process was simulated using Simulink in Matlab.
Variables are solved on a time step basis by Matlab’s built in optimization
algorithms.
Simulation results illustrated that the use of simple leaching and adsorption rate
expressions are effective for investigating dynamic plant behavior under
changing operating conditions.
Subjects/Keywords: Carbon Activated;
MATLAB;
SIMULINK
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APA (6th Edition):
Deist, H. (2008). A dynamic CIP/CIL process simulation using MATLAB SIMULINK
. (Thesis). Cape Peninsula University of Technology. Retrieved from http://etd.cput.ac.za/handle/20.500.11838/1923
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):
Deist, Heino. “A dynamic CIP/CIL process simulation using MATLAB SIMULINK
.” 2008. Thesis, Cape Peninsula University of Technology. Accessed April 11, 2021.
http://etd.cput.ac.za/handle/20.500.11838/1923.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Deist, Heino. “A dynamic CIP/CIL process simulation using MATLAB SIMULINK
.” 2008. Web. 11 Apr 2021.
Vancouver:
Deist H. A dynamic CIP/CIL process simulation using MATLAB SIMULINK
. [Internet] [Thesis]. Cape Peninsula University of Technology; 2008. [cited 2021 Apr 11].
Available from: http://etd.cput.ac.za/handle/20.500.11838/1923.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Deist H. A dynamic CIP/CIL process simulation using MATLAB SIMULINK
. [Thesis]. Cape Peninsula University of Technology; 2008. Available from: http://etd.cput.ac.za/handle/20.500.11838/1923
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Utah
3.
Bhattacharyya, Dhiman.
Aurodicyanide desorption from activated carbon.
Degree: MS, Metallurgical Engineering, 2013, University of Utah
URL: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3504/rec/317
► The industrial use of activated carbon for gold adsorption from alkaline cyanideleach solutions has been a major development in gold hydrometallurgy which wascommercialized during the…
(more)
▼ The industrial use of activated carbon for gold adsorption from alkaline cyanideleach solutions has been a major development in gold hydrometallurgy which wascommercialized during the last part of the 20th century. In the gold industry, activatedcarbon is most often used to adsorb gold from dilute alkaline cyanide solutions. The goldis dissolved as the Au(CN)2-complex and is recovered from the solution by Carbon-in-Pulp (CIP) or Carbon-in-Leach (CIL) processes.Activated carbon loaded with gold must be treated by an elution step to desorb thegold for subsequent recovery. In this way, a smaller volume of higher grade gold solutionis produced, suitable for final gold recovery by electrowinning. The gold elutionefficiency can be increased by the use of hydro-alcoholic solution and high temperature.The effect of particle size on gold elution has not been studied. In this regard,experiments have been performed with different size fractions of activated carbon tostudy the stripping characteristics of activated carbon for gold elution. It has beenobserved that it is difficult to elute gold from fine activated carbon which is quitecontrary to fundamental expectations. From a technological point of view, it is necessaryto develop improved methods of stripping for enhanced gold recovery from alkalinecyanide solutions. As part of this work, to overcome the problem of gold elution fromfine carbon, alternative elution procedures have been developed and discussed. Theseinclude, use of hydro-alcoholic solutions, use of vacuum degassing prior to stripping, andapplication of external pressure.Research on this topic is carried out to enhance the understanding of the scienceinvolved in the elution of gold from fine activated carbon. Hence, current researchfocuses on finding a plausible explanation to explain the difficulty of eluting gold fromfine activated carbon. The emphasis of this research is to address the stripping byexperimentation and with the aid of computational chemistry tools.Since activated carbon consists of a cryptocrystalline graphitic structure whichcontributes significantly to gold adsorption, research on HOPG (highly oriented pyrolyticgraphite) is in progress to determine the nature of graphite surfaces, their wettingcharacteristics, and their significance in gold adsorption / desorption from alkalinecyanide solutions. Computational chemistry analysis of adsorbed aurodicyanide anions atgraphite surfaces are being done to understand the nature of gold adsorption/desorptionfrom alkaline cyanide solutions by activated carbon. Current results from these surfacechemistry studies are used to discuss the state of gold cyanide at activated carbonsurfaces and the anomalous elution dependence on particle size.
Subjects/Keywords: Activated carbon; Desorption; Gold cyanide
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APA (6th Edition):
Bhattacharyya, D. (2013). Aurodicyanide desorption from activated carbon. (Masters Thesis). University of Utah. Retrieved from http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3504/rec/317
Chicago Manual of Style (16th Edition):
Bhattacharyya, Dhiman. “Aurodicyanide desorption from activated carbon.” 2013. Masters Thesis, University of Utah. Accessed April 11, 2021.
http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3504/rec/317.
MLA Handbook (7th Edition):
Bhattacharyya, Dhiman. “Aurodicyanide desorption from activated carbon.” 2013. Web. 11 Apr 2021.
Vancouver:
Bhattacharyya D. Aurodicyanide desorption from activated carbon. [Internet] [Masters thesis]. University of Utah; 2013. [cited 2021 Apr 11].
Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3504/rec/317.
Council of Science Editors:
Bhattacharyya D. Aurodicyanide desorption from activated carbon. [Masters Thesis]. University of Utah; 2013. Available from: http://content.lib.utah.edu/cdm/singleitem/collection/etd3/id/3504/rec/317
University of Minnesota
4.
Rescorla, Andrew.
Effect of lime solids and natural organic matter on
geosmin removal via powdered activated carbon.
Degree: 2012, University of Minnesota
URL: http://purl.umn.edu/140141
► University of Minnesota M.S. thesis. September 2012. Major: Civil Engineering. Advisors: Dr. Ray Hozalski and Dr. Mike Semmens. x, 114 pages, appendices A-L.
Minneapolis Water…
(more)
▼ University of Minnesota M.S. thesis. September
2012. Major: Civil Engineering. Advisors: Dr. Ray Hozalski and Dr.
Mike Semmens. x, 114 pages, appendices A-L.
Minneapolis Water Works, a 60 million gallon per
day water treatment facility, experiences seasonal taste and odor
episodes that result in customer complaints. Geosmin, which imparts
an earthy or musty odor, is one taste and odor causing compound
that has been detected at levels exceeding its odor threshold
concentration. Powdered activated carbon (PAC) is added in the lime
softening plant to remove geosmin via sorption. It is important to
understand how lime solids, contact time, and natural organic
matter (NOM) affect PAC performance so that the correct PAC dose
and application point are used in order to maximize geosmin removal
and minimize PAC cost. Results from jar test experiments suggest
that lime and alum do not inhibit the sorption of geosmin when
added simultaneously with PAC but that contact time is the most
important parameter. Therefore, PAC should generally be added to
the water at the point which maximizes contact time. Conversely,
PAC contained in settled lime solids exhibited a reduced sorption
capacity compared to fresh PAC, indicating that PAC contained in
recycled lime solids has minimal impact on geosmin removal at the
full-scale treatment plant. Additionally, the impact of NOM on PAC
performance was investigated. Using Suwanee River (SR) NOM, an
increase in 1 mg/L dissolved organic carbon resulted in a decrease
in geosmin removal efficiency of 2.7% (at a PAC dose of 7.5 mg/L).
Suwanee River humic acid, SR fulvic acid, and Pony Lake fulvic acid
also inhibited geosmin sorption, but the effect was significantly
lower. For the three SR NOM types, the inhibitive effective
increased as average molecular weight of the NOM decreased. Data
from the full-scale plant were in reasonable agreement with
laboratory jar test data for PAC added immediately before or after
lime. For PAC added at the recarbonation tanks, geosmin removal
efficiencies were much higher at the full-scale plant than in the
jar test experiments. This could be due to the small sample size
(n=4) of the full-scale data set or differences in DOC levels
between jar tests and the full-scale plant.
Subjects/Keywords: Geosmin; Powdered activated carbon
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APA (6th Edition):
Rescorla, A. (2012). Effect of lime solids and natural organic matter on
geosmin removal via powdered activated carbon. (Masters Thesis). University of Minnesota. Retrieved from http://purl.umn.edu/140141
Chicago Manual of Style (16th Edition):
Rescorla, Andrew. “Effect of lime solids and natural organic matter on
geosmin removal via powdered activated carbon.” 2012. Masters Thesis, University of Minnesota. Accessed April 11, 2021.
http://purl.umn.edu/140141.
MLA Handbook (7th Edition):
Rescorla, Andrew. “Effect of lime solids and natural organic matter on
geosmin removal via powdered activated carbon.” 2012. Web. 11 Apr 2021.
Vancouver:
Rescorla A. Effect of lime solids and natural organic matter on
geosmin removal via powdered activated carbon. [Internet] [Masters thesis]. University of Minnesota; 2012. [cited 2021 Apr 11].
Available from: http://purl.umn.edu/140141.
Council of Science Editors:
Rescorla A. Effect of lime solids and natural organic matter on
geosmin removal via powdered activated carbon. [Masters Thesis]. University of Minnesota; 2012. Available from: http://purl.umn.edu/140141
University of Alberta
5.
Liu, Kaiwen.
Removal of Heavy Metal Ions and Diethylenetriamine Species
from Solutions by Magnetic Activated Carbon.
Degree: MS, Department of Chemical and Materials
Engineering, 2013, University of Alberta
URL: https://era.library.ualberta.ca/files/fq977w20v
► Even though activated carbon is widely used in the removal of contaminants from effluents, it is difficult to be completely recovered by screening or classification.…
(more)
▼ Even though activated carbon is widely used in the
removal of contaminants from effluents, it is difficult to be
completely recovered by screening or classification. In this
project, we prepared a magnetic form of activated carbon (M-AC) by
co-precipitation of iron oxides onto activated carbon surface. M-AC
can be separated from solutions by applying an external magnetic
field and regenerated for reuse. The synthesized M-AC was
characterized by X-ray diffraction, specific surface area
measurement, and scanning electron microscope. Characterization
results show that the major phase of coated iron oxides is
magnetite (Fe3O4). Batch adsorption experiments were carried out
for single-component and multi-component solutions. M-AC shows a
better adsorption capacity for single-component of Cu (II), Ni
(II), or diethylenetriamine (DETA) and for multiple-components of
Cu-DETA and Ni-DETA complexes in deionized water than activated
carbon. M-AC also shows the potential application in carbon-in-pulp
process for gold recovery.
Subjects/Keywords: Magnetic activated carbon; Adsorption
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APA (6th Edition):
Liu, K. (2013). Removal of Heavy Metal Ions and Diethylenetriamine Species
from Solutions by Magnetic Activated Carbon. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/fq977w20v
Chicago Manual of Style (16th Edition):
Liu, Kaiwen. “Removal of Heavy Metal Ions and Diethylenetriamine Species
from Solutions by Magnetic Activated Carbon.” 2013. Masters Thesis, University of Alberta. Accessed April 11, 2021.
https://era.library.ualberta.ca/files/fq977w20v.
MLA Handbook (7th Edition):
Liu, Kaiwen. “Removal of Heavy Metal Ions and Diethylenetriamine Species
from Solutions by Magnetic Activated Carbon.” 2013. Web. 11 Apr 2021.
Vancouver:
Liu K. Removal of Heavy Metal Ions and Diethylenetriamine Species
from Solutions by Magnetic Activated Carbon. [Internet] [Masters thesis]. University of Alberta; 2013. [cited 2021 Apr 11].
Available from: https://era.library.ualberta.ca/files/fq977w20v.
Council of Science Editors:
Liu K. Removal of Heavy Metal Ions and Diethylenetriamine Species
from Solutions by Magnetic Activated Carbon. [Masters Thesis]. University of Alberta; 2013. Available from: https://era.library.ualberta.ca/files/fq977w20v
6.
Nahata, Mohit.
Facile Synthesis of Activated Carbon from Cellulose in the Presence of Air for Ammonia Recovery in Resource-Constrained Settings.
Degree: PhD, Chemical Engineering, 2018, University of Michigan
URL: http://hdl.handle.net/2027.42/146068
► As efforts to provide sanitation services in low-resource rural settings of the world proliferate, nutrient recovery via source separation of urine becomes important for economic…
(more)
▼ As efforts to provide sanitation services in low-resource rural settings of the world proliferate, nutrient recovery via source separation of urine becomes important for economic and environmental implications in these regions of challenging socio-economic constraints. Substantial N (in some cases > 50%) is lost from urine via off-gassed ammonia which can be captured and utilized more efficiently by the use of sorbents such as
activated carbon synthesized locally in resource-constrained settings.
My work is focused on developing a simple method to synthesize functionalized-
activated carbon from locally available biomass at moderate temperatures (400-450)°C in the presence of air. Using cellulose as a model biomass and diammonium hydrogenphosphate (DAP) as the activating agent, the production of
activated carbon is explored in a simple semi-batch Partial Oxidation (POX) reactor setup. DAP helps to facilitate low temperature pyrolysis of cellulose by the action of phosphoric acid which helps in depolymerization and the breakdown of glycosidic linkages present in lignocellulosic biomass. Further, the film of condensed phosphates prevents
carbon oxidation at high temperature in the presence of air. This study provides insight into the interaction between DAP and biomass, as well as the char forming mechanism. Various characterization techniques such as N2 physisorption, XPS, DRIFTS, SEM, TEM, surface charge measurements and Raman spectroscopy are utilized to compare the properties between
activated carbon formed under nitrogen and partial oxidative conditions.
The interaction of DAP with cellulose is investigated and the nature of bonding of the heteroatoms to the carbonaceous matrix is elucidated. Our results indicate that the quality of
activated carbon prepared under partial oxidation condition is comparable to
carbon prepared under nitrogen, leading to the possibility of an
activated biochar production scheme on a small scale.
The prepared
activated carbon is utilized to recover ammonia off-gassed from urine providing multiple benefits including odor removal and nutrient recovery since ammonia augmented biochar can serve as a soil amendment. The hygroscopic nature of the prepared
activated biochar is useful for holding soil moisture during the dry season and is envisioned to provide better soil health for round the year crop production. The efficacy of the synthesized
activated biochar as an ammonia adsorbent is evaluated from adsorption isotherms by studying equilibrium capacity and elucidating the nature of the interaction by Temperature Programmed Desorption (TPD) and DRIFTS measurements. Our results show promising capacities for ammonia adsorption from the gas phase. The total dry ammonia adsorption capacity of the synthesized
activated carbons was found to be ~ (24-28) mg/g at 50°C, comparable in magnitude to zeolites. It was observed that > 90% of the adsorbed ammonia could be easily recovered by simple water washing at room temperature, facilitating facile regeneration.
Advisors/Committee Members: Schwank, Johannes W (committee member), Raskin, Lutgarde M (committee member), Barteau, Mark A (committee member), Fisher, Galen B (committee member), Tadd, Andrew Roland (committee member).
Subjects/Keywords: activated carbon; Chemical Engineering; Engineering
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APA (6th Edition):
Nahata, M. (2018). Facile Synthesis of Activated Carbon from Cellulose in the Presence of Air for Ammonia Recovery in Resource-Constrained Settings. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/146068
Chicago Manual of Style (16th Edition):
Nahata, Mohit. “Facile Synthesis of Activated Carbon from Cellulose in the Presence of Air for Ammonia Recovery in Resource-Constrained Settings.” 2018. Doctoral Dissertation, University of Michigan. Accessed April 11, 2021.
http://hdl.handle.net/2027.42/146068.
MLA Handbook (7th Edition):
Nahata, Mohit. “Facile Synthesis of Activated Carbon from Cellulose in the Presence of Air for Ammonia Recovery in Resource-Constrained Settings.” 2018. Web. 11 Apr 2021.
Vancouver:
Nahata M. Facile Synthesis of Activated Carbon from Cellulose in the Presence of Air for Ammonia Recovery in Resource-Constrained Settings. [Internet] [Doctoral dissertation]. University of Michigan; 2018. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/2027.42/146068.
Council of Science Editors:
Nahata M. Facile Synthesis of Activated Carbon from Cellulose in the Presence of Air for Ammonia Recovery in Resource-Constrained Settings. [Doctoral Dissertation]. University of Michigan; 2018. Available from: http://hdl.handle.net/2027.42/146068
7.
Balladares, Oscar Damian 1988-.
Application of adsorption on activated carbons and natural zeolite for the removal of lincomycin from wastewater of swine production industry.
Degree: 2017, University of Saskatchewan
URL: http://hdl.handle.net/10388/7997
► The occurrence of antibiotics in natural water bodies have concerned the scientific community because of the potential development of antibiotic resistance in bacteria. Lincomycin is…
(more)
▼ The occurrence of antibiotics in natural water bodies have concerned the scientific community because of the potential development of antibiotic resistance in bacteria. Lincomycin is a lincosamide antibiotic used in the Saskatchewan swine industry for infection treatment, prevention, and possibly weight gain. The dose recommended for swine contains 22 g of lincomycin per metric ton of feed. Due to partial metabolization, part of the lincomycin is excreted through manure. It has been reported that after 5 weeks of storage, 74 % of this compound is degraded by natural processes in the manure. Therefore, it is important to remove the remaining lincomycin from manure before its application to land.
Adsorption on
activated carbons and zeolites was used for removing lincomycin from water and synthetic manure. For
activated carbons, lincomycin adsorption was greater at solution initial pH 10, above the lincomycin’s pKa (7.8), than at initial neutral pH of 6.5. On the other hand, increasing the pH value reduced the adsorption capacity in the natural zeolite. The presence of NaCl did not affect the adsorption capacity of
activated carbons because non-electrostatic interactions controlled the process. Conversely, for natural zeolite, increasing ionic strength decreased the adsorption capacity, probably, because the cationic exchange process was affected. From the thermodynamic characterization, it was determined that the adsorption, on both
activated carbons and zeolites, was endothermic and spontaneous.
The better performance adsorbents were evaluated in the removal of lincomycin from synthetic and real manure. In synthetic manure, the adsorption capacities were similar to the ones found at pH 10 in deionized water. The lack of solids and compounds competing for active sites, in the synthetic manure formulation, contributed to the unaltered adsorption capacities. On the other hand, in the real manure, due to competition and the presence of solids, the concentration of
activated carbon used in the experiments with deionized water (50 mg/L) was insufficient for separating lincomycin. Different doses of
activated carbon were tested and the simplified background equivalent compound model was used for predicting the lincomycin removal efficiency based on the used adsorbent dose.
Activated carbon 1240 showed higher lincomycin adsorption capacity than F400 in real manure. As a comparison, for 60% lincomycin removal, doses of 900 mg/L and 1300 mg/L of 1240 and F400 can be used, respectively.
Advisors/Committee Members: Soltan, Jafar, Zhang, Lifeng, Niu, Catherine, Chang, Won J.
Subjects/Keywords: adsorption; livestock; activated carbon
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APA (6th Edition):
Balladares, O. D. 1. (2017). Application of adsorption on activated carbons and natural zeolite for the removal of lincomycin from wastewater of swine production industry. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/7997
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):
Balladares, Oscar Damian 1988-. “Application of adsorption on activated carbons and natural zeolite for the removal of lincomycin from wastewater of swine production industry.” 2017. Thesis, University of Saskatchewan. Accessed April 11, 2021.
http://hdl.handle.net/10388/7997.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Balladares, Oscar Damian 1988-. “Application of adsorption on activated carbons and natural zeolite for the removal of lincomycin from wastewater of swine production industry.” 2017. Web. 11 Apr 2021.
Vancouver:
Balladares OD1. Application of adsorption on activated carbons and natural zeolite for the removal of lincomycin from wastewater of swine production industry. [Internet] [Thesis]. University of Saskatchewan; 2017. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/10388/7997.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Balladares OD1. Application of adsorption on activated carbons and natural zeolite for the removal of lincomycin from wastewater of swine production industry. [Thesis]. University of Saskatchewan; 2017. Available from: http://hdl.handle.net/10388/7997
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Texas A&M University
8.
Florey, James.
The Potential for Activated Biochar to Remove Waterborne Viruses from Environmental Waters.
Degree: MS, Soil Science, 2012, Texas A&M University
URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10925
► The need for clean potable water and sustainable energy are two current and pressing issues with implications affecting the global population. Renewed interests in alternative…
(more)
▼ The need for clean potable water and sustainable energy are two current and pressing issues with implications affecting the global population. Renewed interests in alternative energy have prompted researchers to investigate the full capacity of biofuels. These interests have led to not only the examination of current method limitations, but also to the investigation of new conversion methods. One promising method for bioenergy production is pyrolysis of lignocellulosic feedstocks. Through pyrolysis, a single crop may produce ethanol, bio-oil, and/or gaseous energy (syngas). The remaining solid phase product is a black
carbon dubbed 'biochar'.
In the current study, biochar was used as a both an unamended sorbent and a precursor to form powdered
activated carbons (PACs) capable of removing waterborne viruses. Biochar was
activated with KOH, ZnCl2, and H3PO4 and analyzed using the Brunauer, Emmett and Teller (BET) method, a combination of Kjeldahl digest and ICP-MS, and scanning electron microscopy (SEM). Sorbents were tested in batch studies using phosphate buffered saline (PBS), surface water, and groundwater. Bacteriophages MS2 and thetaX174 served as viral surrogates.
All activation treatments significantly increased surface area, up to 1495.5 m2/g (KOH-
activated). While the non-
activated biochar was not effective in virus removal, the KOH-
activated PAC had tremendous removal in the PBS/MS2 batch (mean 98.7% removal, up to 6.2 x 109 particles/mL, as compared to the Darco S-51: 82.3%).
As evidenced by this study, sorption efficiency will be governed by viral species,
carbon type and concentration, and water quality. The results of this study indicate that biochar can serve as a precursor for a highly porous and effective PAC, capable of removing waterborne viruses from environmental waters.
Advisors/Committee Members: Gentry, Terry (advisor), Deng, Youjun (committee member), Pillai, Suresh (committee member).
Subjects/Keywords: Biochar; Activated Carbon; Pyrolysis; Bacteriophage
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APA (6th Edition):
Florey, J. (2012). The Potential for Activated Biochar to Remove Waterborne Viruses from Environmental Waters. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10925
Chicago Manual of Style (16th Edition):
Florey, James. “The Potential for Activated Biochar to Remove Waterborne Viruses from Environmental Waters.” 2012. Masters Thesis, Texas A&M University. Accessed April 11, 2021.
http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10925.
MLA Handbook (7th Edition):
Florey, James. “The Potential for Activated Biochar to Remove Waterborne Viruses from Environmental Waters.” 2012. Web. 11 Apr 2021.
Vancouver:
Florey J. The Potential for Activated Biochar to Remove Waterborne Viruses from Environmental Waters. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10925.
Council of Science Editors:
Florey J. The Potential for Activated Biochar to Remove Waterborne Viruses from Environmental Waters. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10925
Penn State University
9.
Gu, Xin.
PREPARATION AND CHARACTERIZATION OF N-ALKYL QUATERNIZED ACTIVATED CARBON FOR PERCHLORATE REMOVAL FROM GROUNDWATER
.
Degree: 2011, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/12644
► Chemicals that are released into our surface and subsurface waters are a pervasive environmental problem. Sources of chemical contamination range from incorrectly disposing of and…
(more)
▼ Chemicals that are released into our surface and subsurface waters are a pervasive environmental problem. Sources of chemical contamination range from incorrectly disposing of and treating chemical waste, to abandoned waste disposal sites, to leaking storage tanks that might contain hazardous chemicals. Perchlorate is one of those contaminants that, due to kinetic and thermodynamic properties, is quite difficult to remove from contaminated waters and soils. Because of this, perchlorate has become a significant en-
vironmental contaminants. Conventional treatment techniques, including virgin granular
activated carbon (GAC), air stripping and advanced oxidation had limited or no effect on low perchlorate concentrations in water. Ion exchange with quaternary ammonium or pyridinium groups is currently the most frequently used method for the treatment of perchlorate-contaminated drinking water. This study aims to prepare
activated carbon
tailored with pyridinium functional groups to remove perchlorate from ground water.
To achieve this aim, three main phases of research activities were conducted. In Phase I,
activated carbon with pyridinium functional groups and high pore volume was prepared. The sample preparation included three steps: nitric acid oxidation, thermal treatment in ammonia and the quaternization reaction. The surface chemistry and
pore structure of samples from each step were characterized (phase II) and the reaction conditions were optimized. In phase III, the final products were tested with respect to perchlorate adsorption (isotherm test and rapid small scale column test).
The nitric acid oxidation generated a large number of surface functional groups such as carbonyl, carboxyl, and phenol groups, which is a prerequisite for introducing a high amount of nitrogen containing moieties onto the
carbon surface. During the second step of the treatment, amination, surface elemental analysis (by X-ray photoelectron spectroscopy, XPS) results showed that nitrogen was incorporated into the
carbon matrix as high as 7.2% (atomic percentage). The temperature of the ammonia treatment, the degree of pre-oxidation and the fraction of ammonia in the carrier gas influenced the resulting populations of oxygen and nitrogen species. Based on the XPS study on N1s spectrum at different amination temperature, it is suspected that during the initial stages of heating, some intermediates such as amide, lactam and imide were formed. As temperature increased, these labile species were converted to more thermodynamically stable structures with heterocyclic aromatic moieties (pyridinic or pyrrolic functional groups). At higher temperature (> 600◦C), the fraction of quaternary nitrogen gradually increased and some nitrogen species might have decomposed. Through quaternization, pyridine groups at edge sites were successfully transformed to pyridinium groups (20%
of total nitrogen). XPS in conjunction with chemical derivatization (by methyl iodide) was confirmed to be an effective way to qualitatively analyze the pyridinium…
Advisors/Committee Members: Nicole Robitaille Brown, Thesis Advisor/Co-Advisor, Nicole Robitaille Brown, Thesis Advisor/Co-Advisor, Fred Scott Cannon, Thesis Advisor/Co-Advisor.
Subjects/Keywords: QUATERNIZED ACTIVATED CARBON; PERCHLORATE REMOVAL
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APA (6th Edition):
Gu, X. (2011). PREPARATION AND CHARACTERIZATION OF N-ALKYL QUATERNIZED ACTIVATED CARBON FOR PERCHLORATE REMOVAL FROM GROUNDWATER
. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/12644
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):
Gu, Xin. “PREPARATION AND CHARACTERIZATION OF N-ALKYL QUATERNIZED ACTIVATED CARBON FOR PERCHLORATE REMOVAL FROM GROUNDWATER
.” 2011. Thesis, Penn State University. Accessed April 11, 2021.
https://submit-etda.libraries.psu.edu/catalog/12644.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Gu, Xin. “PREPARATION AND CHARACTERIZATION OF N-ALKYL QUATERNIZED ACTIVATED CARBON FOR PERCHLORATE REMOVAL FROM GROUNDWATER
.” 2011. Web. 11 Apr 2021.
Vancouver:
Gu X. PREPARATION AND CHARACTERIZATION OF N-ALKYL QUATERNIZED ACTIVATED CARBON FOR PERCHLORATE REMOVAL FROM GROUNDWATER
. [Internet] [Thesis]. Penn State University; 2011. [cited 2021 Apr 11].
Available from: https://submit-etda.libraries.psu.edu/catalog/12644.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Gu X. PREPARATION AND CHARACTERIZATION OF N-ALKYL QUATERNIZED ACTIVATED CARBON FOR PERCHLORATE REMOVAL FROM GROUNDWATER
. [Thesis]. Penn State University; 2011. Available from: https://submit-etda.libraries.psu.edu/catalog/12644
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
10.
Lasota, Maria Jacinta.
Oxidative degradation of aniline derived compounds over carbon based materials.
Degree: 2011, Instituto Politécnico de Bragança
URL: https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/2266
► The objectives of this work were: the preparation of different forms of carbon materials (AC, ACSA, CX, CXSA and GBCM), assessment of their catalytic efficiency…
(more)
▼ The objectives of this work were: the preparation of different forms of
carbon materials (AC, ACSA, CX, CXSA and GBCM), assessment of their catalytic efficiency in the CWPO of the azo dye Chromotrope 2R.
Initially the materials were characterized by several techniques, afterwards adsorption and reaction runs were done and lastly the samples obtained from the adsorption/reaction runs were tested using the COD to calculate the organic matter in solution.
Reactions were carried out with 100 mg/L C2R solution at 50ºC, pH = 3, hydrogen peroxide of 34.6 mM (5 mL) and 0.5 g/L of
carbon material. Several samples (5 mL) were removed from the reactor during 2.5 hours to evaluate the evolution of the dye removal by analysis with UV-VIS (spectrophotometer). The adsorption runs were done the same way, but without hydrogen peroxide.
The best results were obtained with
Activated Carbon, this material was the best adsorbing material and catalyst, removing 64 % of C2R after 150min of reaction and 74 % the adsorption run.
As the reaction results weren´t better than the adsorption ones, iron was incorporated in two of the materials. Incorporating iron in the
carbon materials increased radically their catalytic behaviour, with 100 % removal being attained after 150 min of reaction. Os objectivos deste trabalho foram: a preparação de diferentes materiais de carbono (AC, ACSA, CX, CXSA e GBCM) e testar a eficiência destes no CWPO do corante Chromotrope 2R.
Inicialmente os materiais foram caracterizados através de várias técnicas, seguidamente foram realizados os ensaios de adsorção e reacção, e no fim, determinou-se a Carência Química do Oxigénio (CQO) das amostras resultantes dos ensaios.
As reacções foram feitas numa solução de Chromotrope a 100 mg/L, a 50º C, pH = 3, peróxido de hidrogénio a 34.6 mM (5 mL) e com 0.5 g/L de material de carbono. Foram retiradas várias amostras (5 mL) do reactor durante 2.5 horas, para avaliar a evolução da degradação do corante através da análise com UV-VIS (espectrofotómetro). Os ensaios de adsorção foram feitos da mesma forma, mas sem o peróxido de hidrogénio.
Os melhores resultados foram obtidos com o carvão activado que foi o melhor adsorvente e catalisador, removendo 64 % do Chromotrope após 150 min de reacção e 74 % no ensaio de adsorção.
Como os resultados da reacção não foram melhores que os obtidos da adsorção, foi incorporado ferro em dois dos materiais. A incorporação de ferro nos materiais de carbono aumentou radicalmente o comportamento catalítico destes, obtendo-se uma remoção de 100 % após 150 min de reacção.
Advisors/Committee Members: Gomes, Helder.
Subjects/Keywords: CWPO; Hydrogen peroxide; Activated carbon
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APA (6th Edition):
Lasota, M. J. (2011). Oxidative degradation of aniline derived compounds over carbon based materials. (Thesis). Instituto Politécnico de Bragança. Retrieved from https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/2266
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):
Lasota, Maria Jacinta. “Oxidative degradation of aniline derived compounds over carbon based materials.” 2011. Thesis, Instituto Politécnico de Bragança. Accessed April 11, 2021.
https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/2266.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lasota, Maria Jacinta. “Oxidative degradation of aniline derived compounds over carbon based materials.” 2011. Web. 11 Apr 2021.
Vancouver:
Lasota MJ. Oxidative degradation of aniline derived compounds over carbon based materials. [Internet] [Thesis]. Instituto Politécnico de Bragança; 2011. [cited 2021 Apr 11].
Available from: https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/2266.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lasota MJ. Oxidative degradation of aniline derived compounds over carbon based materials. [Thesis]. Instituto Politécnico de Bragança; 2011. Available from: https://www.rcaap.pt/detail.jsp?id=oai:bibliotecadigital.ipb.pt:10198/2266
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Oregon State University
11.
Hansen, Sigurd Paul.
The application of granular activated carbon to the treatment of kraft evaporator condensate wastes.
Degree: MS, Civil Engineering, 1966, Oregon State University
URL: http://hdl.handle.net/1957/48021
Subjects/Keywords: Carbon; Activated
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APA (6th Edition):
Hansen, S. P. (1966). The application of granular activated carbon to the treatment of kraft evaporator condensate wastes. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/48021
Chicago Manual of Style (16th Edition):
Hansen, Sigurd Paul. “The application of granular activated carbon to the treatment of kraft evaporator condensate wastes.” 1966. Masters Thesis, Oregon State University. Accessed April 11, 2021.
http://hdl.handle.net/1957/48021.
MLA Handbook (7th Edition):
Hansen, Sigurd Paul. “The application of granular activated carbon to the treatment of kraft evaporator condensate wastes.” 1966. Web. 11 Apr 2021.
Vancouver:
Hansen SP. The application of granular activated carbon to the treatment of kraft evaporator condensate wastes. [Internet] [Masters thesis]. Oregon State University; 1966. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/1957/48021.
Council of Science Editors:
Hansen SP. The application of granular activated carbon to the treatment of kraft evaporator condensate wastes. [Masters Thesis]. Oregon State University; 1966. Available from: http://hdl.handle.net/1957/48021
University of Adelaide
12.
Zhao, Yongling.
Study of activated carbon/methanol adsorption refrigeration tube and system integration.
Degree: 2011, University of Adelaide
URL: http://hdl.handle.net/2440/66346
► Solid adsorption refrigeration systems are attracting much research interest because they have numerous advantages, such as using low grade thermal energy and being environment friendly.…
(more)
▼ Solid adsorption refrigeration systems are attracting much research interest because they have numerous advantages, such as using low grade thermal energy and being environment friendly. In recent decades many efforts have been put into developing various prototypes. The adsorption refrigeration tube (ART) is one such development. Through better system integration, a module consisting of a number of individually working ARTs can achieve significant refrigeration capacity, which may solve the vacuum leaking problem that besets large adsorption systems. In order to propose a feasible ART, this thesis undertakes a study of adsorptive properties of three types of
activated carbon/methanol working pairs and modelling of the adsorption refrigeration cycle. In this examination of adsorptive properties, three
activated carbon samples, Calgon 207C, 207EA and WS-480, were used to test and determine their pressure-temperature-concentration (P−T−x) relationship with methanol as the adsorbate. Based on the experimental data, three adsorption state equations, Langmuir equation, Freundlich equation and Dubinin-Astakov (D-A) equation, were compared in terms of their agreement with experimental data and their format impact on calculating coefficient of performance (COP) and refrigeration output (Qr), if one of the formats was used for presenting experimental data. Moreover, a sensitivity analysis was
conducted to reveal the parameters’ sensitivity to calculation of COP and Qr. It was found in this study that the D-A equation is the best state equation for presenting the adsorptive properties of the tested
activated carbon/methanol working pairs in terms of the best agreement of P−T−x correlation and least sensitivities to parameters’ errors. A1-D dynamic model was established and validated experimentally, in which a local non-equilibrium treatment and dynamic boundary condition were introduced to the mathematical model. Regarding thermal non-equilibrium treatment, the temperatures of the local solid phase (
activated carbon and adsorbed methanol) and local fluid phase were treated separately. Due to this non-equilibrium treatment, i.e. a two temperature treatment, convective heat transfer within the transport pores of
activated carbon can be considered in the mathematical model. Moreover, a mathematically defined function was introduced to present the transient pressure process at the beginning of an adsorption process. Using this function, the temperature jump phenomenon can be well predicted by the mathematical model. After the mathematical model had been established and validated, a parametric analysis was conducted using the mathematical model. The effects of the cylindrical
activated carbon column’s diameter and evaporating temperature on cycle time, COP and specific cooling power (SCP) were examined. Furthermore, a case study of cycle time optimisation was conducted. Finally, based on the parametric analysis, a practical solution using integrated groups of individual ART was proposed for home or domestic application. A…
Advisors/Committee Members: Hu, Eric Jing (advisor), Blazewicz, Antoni Michal (advisor), School of Mechanical Engineering (school).
Subjects/Keywords: activated carbon; methanol; adsorption refrigeration
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APA (6th Edition):
Zhao, Y. (2011). Study of activated carbon/methanol adsorption refrigeration tube and system integration. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/66346
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):
Zhao, Yongling. “Study of activated carbon/methanol adsorption refrigeration tube and system integration.” 2011. Thesis, University of Adelaide. Accessed April 11, 2021.
http://hdl.handle.net/2440/66346.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zhao, Yongling. “Study of activated carbon/methanol adsorption refrigeration tube and system integration.” 2011. Web. 11 Apr 2021.
Vancouver:
Zhao Y. Study of activated carbon/methanol adsorption refrigeration tube and system integration. [Internet] [Thesis]. University of Adelaide; 2011. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/2440/66346.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zhao Y. Study of activated carbon/methanol adsorption refrigeration tube and system integration. [Thesis]. University of Adelaide; 2011. Available from: http://hdl.handle.net/2440/66346
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Minnesota
13.
Rescorla, Andrew.
Effect of lime solids and natural organic matter on geosmin removal via powdered activated carbon.
Degree: MS, Civil Engineering, 2012, University of Minnesota
URL: http://purl.umn.edu/140141
► Minneapolis Water Works, a 60 million gallon per day water treatment facility, experiences seasonal taste and odor episodes that result in customer complaints. Geosmin, which…
(more)
▼ Minneapolis Water Works, a 60 million gallon per day water treatment facility, experiences seasonal taste and odor episodes that result in customer complaints. Geosmin, which imparts an earthy or musty odor, is one taste and odor causing compound that has been detected at levels exceeding its odor threshold concentration. Powdered activated carbon (PAC) is added in the lime softening plant to remove geosmin via sorption. It is important to understand how lime solids, contact time, and natural organic matter (NOM) affect PAC performance so that the correct PAC dose and application point are used in order to maximize geosmin removal and minimize PAC cost. Results from jar test experiments suggest that lime and alum do not inhibit the sorption of geosmin when added simultaneously with PAC but that contact time is the most important parameter. Therefore, PAC should generally be added to the water at the point which maximizes contact time. Conversely, PAC contained in settled lime solids exhibited a reduced sorption capacity compared to fresh PAC, indicating that PAC contained in recycled lime solids has minimal impact on geosmin removal at the full-scale treatment plant. Additionally, the impact of NOM on PAC performance was investigated. Using Suwanee River (SR) NOM, an increase in 1 mg/L dissolved organic carbon resulted in a decrease in geosmin removal efficiency of 2.7% (at a PAC dose of 7.5 mg/L). Suwanee River humic acid, SR fulvic acid, and Pony Lake fulvic acid also inhibited geosmin sorption, but the effect was significantly lower. For the three SR NOM types, the inhibitive effective increased as average molecular weight of the NOM decreased. Data from the full-scale plant were in reasonable agreement with laboratory jar test data for PAC added immediately before or after lime. For PAC added at the recarbonation tanks, geosmin removal efficiencies were much higher at the full-scale plant than in the jar test experiments. This could be due to the small sample size (n=4) of the full-scale data set or differences in DOC levels between jar tests and the full-scale plant.
Subjects/Keywords: Geosmin; Powdered activated carbon
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APA (6th Edition):
Rescorla, A. (2012). Effect of lime solids and natural organic matter on geosmin removal via powdered activated carbon. (Masters Thesis). University of Minnesota. Retrieved from http://purl.umn.edu/140141
Chicago Manual of Style (16th Edition):
Rescorla, Andrew. “Effect of lime solids and natural organic matter on geosmin removal via powdered activated carbon.” 2012. Masters Thesis, University of Minnesota. Accessed April 11, 2021.
http://purl.umn.edu/140141.
MLA Handbook (7th Edition):
Rescorla, Andrew. “Effect of lime solids and natural organic matter on geosmin removal via powdered activated carbon.” 2012. Web. 11 Apr 2021.
Vancouver:
Rescorla A. Effect of lime solids and natural organic matter on geosmin removal via powdered activated carbon. [Internet] [Masters thesis]. University of Minnesota; 2012. [cited 2021 Apr 11].
Available from: http://purl.umn.edu/140141.
Council of Science Editors:
Rescorla A. Effect of lime solids and natural organic matter on geosmin removal via powdered activated carbon. [Masters Thesis]. University of Minnesota; 2012. Available from: http://purl.umn.edu/140141
University of Texas – Austin
14.
Cheldelin, Vernon H.
The adsorption of ampholytes on activated charcoal.
Degree: PhD, Biochemistry, 1941, University of Texas – Austin
URL: http://dx.doi.org/10.26153/tsw/7746
Subjects/Keywords: Carbon; Activated
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APA (6th Edition):
Cheldelin, V. H. (1941). The adsorption of ampholytes on activated charcoal. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://dx.doi.org/10.26153/tsw/7746
Chicago Manual of Style (16th Edition):
Cheldelin, Vernon H. “The adsorption of ampholytes on activated charcoal.” 1941. Doctoral Dissertation, University of Texas – Austin. Accessed April 11, 2021.
http://dx.doi.org/10.26153/tsw/7746.
MLA Handbook (7th Edition):
Cheldelin, Vernon H. “The adsorption of ampholytes on activated charcoal.” 1941. Web. 11 Apr 2021.
Vancouver:
Cheldelin VH. The adsorption of ampholytes on activated charcoal. [Internet] [Doctoral dissertation]. University of Texas – Austin; 1941. [cited 2021 Apr 11].
Available from: http://dx.doi.org/10.26153/tsw/7746.
Council of Science Editors:
Cheldelin VH. The adsorption of ampholytes on activated charcoal. [Doctoral Dissertation]. University of Texas – Austin; 1941. Available from: http://dx.doi.org/10.26153/tsw/7746
Rutgers University
15.
Iacobucci, Lauren R., 1994-.
Evaluating the impact of activated carbon on the environmental and engineering properties of cement-stabilized contaminated dredged sediment.
Degree: MS, Civil and Environmental Engineering, 2019, Rutgers University
URL: https://rucore.libraries.rutgers.edu/rutgers-lib/60168/
► The objective of this study was to evaluate the impact of activated carbon on the engineering properties of Portland cement-stabilized contaminated dredged sediment, while investigating…
(more)
▼ The objective of this study was to evaluate the impact of
activated carbon on the engineering properties of Portland cement-stabilized contaminated dredged sediment, while investigating its potential to immobilize contaminants for beneficial use applications. Historically contaminated sediment was sampled from five locations in the United States and Norway: three locations within New York/New Jersey Harbor in the United States and two locations within Stavanger Harbor in Norway. Triplicate laboratory samples were generated for each of the five sediment types at various mixing ratios for stabilization/solidification (S/S). New York/New Jersey Harbor sediments were mixed with 0, 1, and 3% (by wet weight of sediment) powdered
activated carbon (PAC) and 8% Portland cement (PC). Stavanger Harbor sediments were mixed with 0, 1, and 3% (by wet weight of sediment) PAC and 0, 4, 8 and 12% PC. After 28 days of curing, the samples were tested for unconfined compressive strength (UCS). The leaching potential of metals, polycyclic aromatic hydrocarbons (PAHs), and tributyltin was evaluated via the Synthetic Precipitation Leaching Procedure (SPLP). The results of the study indicate that though it may marginally decrease the material’s strength gain,
activated carbon has the potential to aid in the effectiveness of sediment S/S techniques for beneficial use by reducing contaminant mobility. Statistically significant (α = 0.05) reductions in strength between 13% and 53% were observed for soft, fine-grained sediments for mixtures of 8% PC with 1% and 3% doses of AC in this study. However, the addition of AC was instrumental in reducing the leaching concentrations of contaminants below standard criteria, in many cases to non-detectable values. It was particularly effective in reducing the leaching potential of PAHs and tributyltin in cases where PC alone was not effective.
Advisors/Committee Members: Miskewitz, Robert (chair), Maher, Ali (internal member), Najm, Husam (internal member), School of Graduate Studies.
Subjects/Keywords: Sediments (Geology); Carbon, Activated
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APA (6th Edition):
Iacobucci, Lauren R., 1. (2019). Evaluating the impact of activated carbon on the environmental and engineering properties of cement-stabilized contaminated dredged sediment. (Masters Thesis). Rutgers University. Retrieved from https://rucore.libraries.rutgers.edu/rutgers-lib/60168/
Chicago Manual of Style (16th Edition):
Iacobucci, Lauren R., 1994-. “Evaluating the impact of activated carbon on the environmental and engineering properties of cement-stabilized contaminated dredged sediment.” 2019. Masters Thesis, Rutgers University. Accessed April 11, 2021.
https://rucore.libraries.rutgers.edu/rutgers-lib/60168/.
MLA Handbook (7th Edition):
Iacobucci, Lauren R., 1994-. “Evaluating the impact of activated carbon on the environmental and engineering properties of cement-stabilized contaminated dredged sediment.” 2019. Web. 11 Apr 2021.
Vancouver:
Iacobucci, Lauren R. 1. Evaluating the impact of activated carbon on the environmental and engineering properties of cement-stabilized contaminated dredged sediment. [Internet] [Masters thesis]. Rutgers University; 2019. [cited 2021 Apr 11].
Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/60168/.
Council of Science Editors:
Iacobucci, Lauren R. 1. Evaluating the impact of activated carbon on the environmental and engineering properties of cement-stabilized contaminated dredged sediment. [Masters Thesis]. Rutgers University; 2019. Available from: https://rucore.libraries.rutgers.edu/rutgers-lib/60168/
University of Edinburgh
16.
Gibson, John Alastair Arran.
Development of functionalised porous carbon materials for the separation of carbon dioxide from gas mixtures.
Degree: PhD, 2016, University of Edinburgh
URL: http://hdl.handle.net/1842/25488
► This work concerns the functionalisation of a variety of carbon materials for the selective adsorption of carbon dioxide. A key challenge in post-combustion capture from…
(more)
▼ This work concerns the functionalisation of a variety of carbon materials for the selective adsorption of carbon dioxide. A key challenge in post-combustion capture from gas fired power plants is related to the low CO2 concentration in the flue gas (4- 8%). Therefore highly selective adsorbents have the potential to improve the efficiency of the separation of carbon dioxide from gas mixtures. The study was performed in conjunction with the EPSRC funded project ‘Adsorption Materials and Processes for Carbon Capture from Gas-Fired Power Plants – AMPGas’. The carbon materials investigated included multi-walled carbon nanotubes, a microporous activated carbon, two types of mesoporous activated carbon and multi-walled carbon nanotube/polyvinyl alcohol composite aerogels. The uptake of carbon dioxide by these materials was enhanced through the addition of basic amine groups to the materials. The adsorption properties of the samples were tested by the zero-length column technique, thermal gravimetric analysis and breakthrough experiments. The materials were generally tested at conditions representative of those found in the flue gas of a fossil fuel power plant: 0.1 bar partial pressure of CO2. Two approaches were adopted for the chemical functionalization of the solid carbon supports. First, amine groups were covalently grafted directly to the surface and secondly amine molecules were physically adsorbed within the porous structure of the material by wet impregnation. It was seen that wet impregnation enabled the incorporation of a greater number of amine groups and the CO2 capacity of the materials was investigated with respect to the carbon support structure, the type of amine and the amount of amine loading. Larger pore volume mesoporous carbon materials were seen to provide a more efficient support for the amine to interact with the CO2. A greater than 12-fold increase in the CO2 capacity was observed when the amine impregnated carbon material was compared to the raw starting material. The extended zero-length column was introduced and fully characterized as a novel breakthrough experiment. It requires a small sample mass (~50 mg) and it allows binary selectivities to be calculated. It was shown, through multiple experiments and simulations that the breakthrough experiments were conducted under close to isothermal conditions which greatly simplifies the analysis of the breakthrough curves. In addition, a new zero-length column model was proposed to account for the reaction between the amine and the CO2 in the adsorbed phase and fitted to experimental data. An interesting double curvature was observed in the concentration profile during the desorption step which was attributed to the kinetics of the amine-CO2 reaction. A brief investigation was carried out into the binary separation of biogas (45% CO2: 55% CH4) by zeolite 13X, activated carbon and an amine impregnated activated carbon. Finally, initial investigations into the properties of low density carbon nanotube aerogels which have a large accessible pore volume,…
Subjects/Keywords: 620.1; adsorption; carbon capture; activated carbon
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APA (6th Edition):
Gibson, J. A. A. (2016). Development of functionalised porous carbon materials for the separation of carbon dioxide from gas mixtures. (Doctoral Dissertation). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/25488
Chicago Manual of Style (16th Edition):
Gibson, John Alastair Arran. “Development of functionalised porous carbon materials for the separation of carbon dioxide from gas mixtures.” 2016. Doctoral Dissertation, University of Edinburgh. Accessed April 11, 2021.
http://hdl.handle.net/1842/25488.
MLA Handbook (7th Edition):
Gibson, John Alastair Arran. “Development of functionalised porous carbon materials for the separation of carbon dioxide from gas mixtures.” 2016. Web. 11 Apr 2021.
Vancouver:
Gibson JAA. Development of functionalised porous carbon materials for the separation of carbon dioxide from gas mixtures. [Internet] [Doctoral dissertation]. University of Edinburgh; 2016. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/1842/25488.
Council of Science Editors:
Gibson JAA. Development of functionalised porous carbon materials for the separation of carbon dioxide from gas mixtures. [Doctoral Dissertation]. University of Edinburgh; 2016. Available from: http://hdl.handle.net/1842/25488
Anna University
17.
Senthilkumar T.
Adsorption of textile dye effluent Using activated carbon
obtained From biomass;.
Degree: Adsorption of textile dye effluent Using activated
carbon obtained From biomass, 2015, Anna University
URL: http://shodhganga.inflibnet.ac.in/handle/10603/34171
► newlineIn the present study, activated carbons were prepared from sisal newlinefiber Agave sisalana sp and pomegranate peel Punica granatum sp using newlinephosphoric acid H3PO4 as…
(more)
▼ newlineIn the present study, activated carbons were
prepared from sisal newlinefiber Agave sisalana sp and pomegranate
peel Punica granatum sp using newlinephosphoric acid H3PO4 as the
activating agent The proximate analysis of newlineadsorbents was
studied by thermogravimetric analysis The effects of
newlineactivation temperature activation time and impregnation
ratio on the quality newlineof the activated carbon produced were
studied The activation parameters newlinewere optimised yielding
impregnation ratio 1 3 activation temperature newline500 °C
activation time 1hour for pomegranate peel impregnation ratio 1 3 8
newlineactivation temperature 400 C activation time 1 hour when the
raw material newlinewas sisal fibre Both sisal fiber activated
carbon SFAC and pomegranate newlinepeel activated carbon PPAC were
characterized by finding out its yield newlineiodine number
methylene blue number and surface area The surface
newlinemorphology and functional groups of the raw materials and
activated carbon newlinesamples were obtained using scanning
electron microscope EDAX and newlineFourier transform infrared
analysis newline newline
reference p262-279.
Advisors/Committee Members: Lima rose miranda.
Subjects/Keywords: Electron microscope; Pomegranate peel activated carbon; Sisal fiber activated carbon
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APA (6th Edition):
T, S. (2015). Adsorption of textile dye effluent Using activated carbon
obtained From biomass;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/34171
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):
T, Senthilkumar. “Adsorption of textile dye effluent Using activated carbon
obtained From biomass;.” 2015. Thesis, Anna University. Accessed April 11, 2021.
http://shodhganga.inflibnet.ac.in/handle/10603/34171.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
T, Senthilkumar. “Adsorption of textile dye effluent Using activated carbon
obtained From biomass;.” 2015. Web. 11 Apr 2021.
Vancouver:
T S. Adsorption of textile dye effluent Using activated carbon
obtained From biomass;. [Internet] [Thesis]. Anna University; 2015. [cited 2021 Apr 11].
Available from: http://shodhganga.inflibnet.ac.in/handle/10603/34171.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
T S. Adsorption of textile dye effluent Using activated carbon
obtained From biomass;. [Thesis]. Anna University; 2015. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/34171
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Universidade Nova
18.
Júlio, Maria de Fátima de Jesus Leal.
Carbon key-properties for microcystin adsorption in drinking water treatment: structure or surface chemistry?.
Degree: 2011, Universidade Nova
URL: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/7066
► Dissertação para Obtenção de Grau de Mestre em Engenharia Química e Bioquímica
The carbon key-properties (structure and surface chemistry) for microcystin-LR (MC-LR) adsorption onto activated…
(more)
▼ Dissertação para Obtenção de Grau de Mestre em Engenharia Química e Bioquímica
The carbon key-properties (structure and surface chemistry) for microcystin-LR (MC-LR) adsorption onto activated carbon were investigated. Waters with an inorganic background matrix approaching that of the soft natural water (2.5 mM ionic strength) were used. Also, model waters with controlled ionic make-up and NOM surrogate with similar size of MC-LR (tannic acid - TA) with MC-LR extracts were tested with activated carbon NORIT 0.8 SUPRA. For this AC, two particle sizes, 125-180 μm and 63-90 μm were tested. The surface chemistry of NOR 125-180 μm was modified by thermal treatment and was also preloaded with TA. The integrated analysis of carbon’s chemical and textural characterization and of kinetic and isotherm modeling using non-linear models allowed concluding that: i) the heating method is an efficient and simple process for reducing a relatively hydrophilic activated carbon and thereby enhancing its MC-LR adsorption capacity; ii) from a combination of the modification of the carbon surface chemistry and the carbon structure, it is demonstrates that both properties play an important role in the adsorption process, although carbon surface chemistry seems to be more important than its porous structure – MC-LR adsorption correlated with meso and macroporous volume and particularly well with carbon hydrophobicity (inverse of oxygen content); iii) the smaller the particle size, the more important is external mass transfer over intraparticle diffusion; iv) similar sized NOM strongly competes with MC-LR for the same AC sites; v) direct competition governs the simultaneous MC-LR and NOM adsorption; vi) the preloading phenomena reduces significantly the performance of activated carbon adsorption.
Advisors/Committee Members: Viegas, Rui, Fonseca, Isabel.
Subjects/Keywords: Activated carbon adsorption; Drinking water treatment; Microcystin-LR; Natural organic matter competition; Activated carbon structure; Activated carbon surface chemistry
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APA (6th Edition):
Júlio, M. d. F. d. J. L. (2011). Carbon key-properties for microcystin adsorption in drinking water treatment: structure or surface chemistry?. (Thesis). Universidade Nova. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/7066
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):
Júlio, Maria de Fátima de Jesus Leal. “Carbon key-properties for microcystin adsorption in drinking water treatment: structure or surface chemistry?.” 2011. Thesis, Universidade Nova. Accessed April 11, 2021.
http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/7066.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Júlio, Maria de Fátima de Jesus Leal. “Carbon key-properties for microcystin adsorption in drinking water treatment: structure or surface chemistry?.” 2011. Web. 11 Apr 2021.
Vancouver:
Júlio MdFdJL. Carbon key-properties for microcystin adsorption in drinking water treatment: structure or surface chemistry?. [Internet] [Thesis]. Universidade Nova; 2011. [cited 2021 Apr 11].
Available from: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/7066.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Júlio MdFdJL. Carbon key-properties for microcystin adsorption in drinking water treatment: structure or surface chemistry?. [Thesis]. Universidade Nova; 2011. Available from: http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/7066
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
NSYSU
19.
Lin, Ze-min.
Removal of Organic Matters from Domestic Wastewater Using GAC Trickling Filter.
Degree: Master, Environmental Engineering, 2012, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0707112-145620
► Because of high intense population is in Taiwan, households water use requires a considerable amount. It is substantially reduce daily water use to share primary…
(more)
▼ Because of high intense population is in Taiwan, households water use requires a considerable amount. It is substantially reduce daily water use to share primary water resources, if we can reclaim domestic wastewater properly and make it support. Currently, reclaiming water is an emerging requirement for management and application. If we can adequately monitor and treat reclaimed water, reducing environmental contaminants, costs, and environmental feedback is possible.
The study treated domestic wastewater of Feng-Shan river using GAC trickling filter with two column in a series and the removal efficiency of organic
carbon was observed. The experimental results indicated that removal efficiency of organic
carbon concentration was decreased as the empty-bed contact time (EBCT) increased. The best average removal efficiency of TOC and DOC was about 72% and 78%. According to the TOC removal rates using GAC at different temperatures, the TOC removal rates at room temperature and 4âwere respectively 95% and 90% in the first column of the experiment and 85% and 80% in the second column. The removal rates of dissolved organic
carbon (DOC) using GAC folter system at room temperature and 4â were respectively 95% and 90% in the first column of the experiment and 90% and 87% in the second column. Obviously,the TOC removal rate treated using GAC filter system at room temperature was superior to that treated at 4â
In comparing treated water and recycled water,most of the water quality parameters (temperatureãSuspended solidsãBODãCODãpH) were to meet recycled water quality standards.However, the system due to use GAC trickling filter system treatment that easily decrease dissolved oxygen in treated water but conductivity in treated water without changes. These two water parameters were failed to meet the recycled water standards.
By the way, we found trained GAC through SEM irradiation the biofilm area of trained GAC surface at 25âwas superior to that treated at 4â. It corresponds to the removal efficiency of organic
carbon, the removal efficiency of 25â was higher than result of 4â. Therefore, a certain relationship between the biofilm area and removal efficiency of organic
carbon is existed in this work.
Advisors/Committee Members: Chung-Bang Chen (chair), Shui-Jen Chen (chair), Chih-Huang Weng (chair), Jimmy C. M. Kao (chair), Jie-Chung Lou (committee member).
Subjects/Keywords: bio-activated carbon filter system; total organic carbon; dissolved organic carbon
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APA ·
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CSE |
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Manager
APA (6th Edition):
Lin, Z. (2012). Removal of Organic Matters from Domestic Wastewater Using GAC Trickling Filter. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0707112-145620
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):
Lin, Ze-min. “Removal of Organic Matters from Domestic Wastewater Using GAC Trickling Filter.” 2012. Thesis, NSYSU. Accessed April 11, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0707112-145620.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lin, Ze-min. “Removal of Organic Matters from Domestic Wastewater Using GAC Trickling Filter.” 2012. Web. 11 Apr 2021.
Vancouver:
Lin Z. Removal of Organic Matters from Domestic Wastewater Using GAC Trickling Filter. [Internet] [Thesis]. NSYSU; 2012. [cited 2021 Apr 11].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0707112-145620.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lin Z. Removal of Organic Matters from Domestic Wastewater Using GAC Trickling Filter. [Thesis]. NSYSU; 2012. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0707112-145620
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
NSYSU
20.
Chen, Chi-Hsien.
Oxidation of DMS (Dimethyl Sulfide) in Waste Gases by Chlorine Oxidation Followed by Activated Carbon Reductive Adsorption.
Degree: Master, Environmental Engineering, 2012, NSYSU
URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0808112-212210
► Optical-electrical, rendering, paper-making, and sewage treatment plants emit odorous waste gases containing dimethyl sulfide (DMS) as one of the major odorous compounds. For the protection…
(more)
▼ Optical-electrical, rendering, paper-making, and sewage treatment plants emit odorous waste gases containing dimethyl sulfide (DMS) as one of the major odorous compounds. For the protection of ambient air quality and prevention of odor complaints, DMS should be eliminated from the gases before venting them into the atmosphere.
This study aimed to develop a process for eliminating DMS in the waste gases by introducing an enough amount of chlorine gas to oxidize DMS therein to non-odorous dimethyl sulfone (DMSO2). The vented gas from the oxidation step is then contacted with a bed of granular
activated carbon (GAC) to convert the residual chlorine to GAC-adsorbed hydrochloric acid and get a nearly odor-free gas.
Both lab-scale and field tests were performed in this study. Results from the lab test indicate that the GAC had only an equilibrium DMS adsorption capacity of 4.30 mg/g GAC with 15-30 ppm DMS and no chlorine in the test gas. With an empty-bed gas-GAC contact time (EBCT) of around 0.49 s and no DMS in the test gas, 42 ppm gaseous chlorine could completely be reduced to HCl and the reduction product adsorbed to the GAC. The GAC had a minimum chlorine elimination capacity of around 110 mg/g GAC. Lab tests also indicate that with a molar Cl2/DMS ratio (R) of around 0.9 and a gas-phase reaction time of 5 s, and an EBCT of 0.58 s, the influent 22 ppm DMS could be removed to below detectable limits. Results from field tests in an optical-electrical wastewater plant show that by the developed process, < 1 ppm DMS in the plantâs waste gas could be treated to an odor-free degree with a chlorine dose of 4-10 ppm.
Advisors/Committee Members: Kang-Hsing Chen (chair), Ming-Shean Chou (committee member), Mei-Chuan Hsu (chair).
Subjects/Keywords: chemical oxidation; dimethyl sulfide; activated carbon; chlorine
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APA ·
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CSE |
Export
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APA (6th Edition):
Chen, C. (2012). Oxidation of DMS (Dimethyl Sulfide) in Waste Gases by Chlorine Oxidation Followed by Activated Carbon Reductive Adsorption. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0808112-212210
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):
Chen, Chi-Hsien. “Oxidation of DMS (Dimethyl Sulfide) in Waste Gases by Chlorine Oxidation Followed by Activated Carbon Reductive Adsorption.” 2012. Thesis, NSYSU. Accessed April 11, 2021.
http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0808112-212210.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chen, Chi-Hsien. “Oxidation of DMS (Dimethyl Sulfide) in Waste Gases by Chlorine Oxidation Followed by Activated Carbon Reductive Adsorption.” 2012. Web. 11 Apr 2021.
Vancouver:
Chen C. Oxidation of DMS (Dimethyl Sulfide) in Waste Gases by Chlorine Oxidation Followed by Activated Carbon Reductive Adsorption. [Internet] [Thesis]. NSYSU; 2012. [cited 2021 Apr 11].
Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0808112-212210.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chen C. Oxidation of DMS (Dimethyl Sulfide) in Waste Gases by Chlorine Oxidation Followed by Activated Carbon Reductive Adsorption. [Thesis]. NSYSU; 2012. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0808112-212210
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Cape Peninsula University of Technology
21.
Teirlinck, Peter Albert Maria.
The adsorption of gold from iodide solutions
.
Degree: 1996, Cape Peninsula University of Technology
URL: http://etd.cput.ac.za/handle/20.500.11838/885
► With the increasing awareness ofpreserving the environment, the need for other lixiviants in leaching processes has escalated. The investigation for lixiviants, especially for gold, has…
(more)
▼ With the increasing awareness ofpreserving the environment, the need for other
lixiviants in leaching processes has escalated. The investigation for lixiviants,
especially for gold, has entailed mostly the halogen group. From halogens, iodine
forms the most stable gold complex. The aim ofthis study was to investigate the
adsorption characteristics of gold-iodide onto a coconut shell based activated carbon.
In the first part of this study, the factors influencing the adsorption kinetics and
equilibrium were investigated. Mixing experiments and interruption tests indicated
clearly that the principal adsorption mechanism is by first order film diffusion. When
the initial gold concentration was changed, the adsorption kinetics and equilibrium
decrease viith an increase in gold concentration. This is due to the shielding effect by
the adsorbed gold as it is partly reduced on the carbon surface. The concentration of
iodide increased the adsorption kinetics and equilibrium. The increase in
concentration of iodine leads to an increase in concentration ofthe principal oxidising
agent, tri-iodide, thereby decreasing the adsorption parameters as the gold gets redissolved
from the carbon surface. Furthermore, iodine and trio-iodide adsorbs
competitively, thereby decreasing the rate ofadsorption ofthe gold complex. This is
further iterated by experiments where the carbon was pre-treated v.ith a iodine/iodide
solution. In acidic solutions, none, or a minimal amount ofthe gold is red11ced on the carbon
surface, adsorption is only in the complex form, while in a alkaline solution, the gold
is partly adsorbed and partly reduced.
In the second section, the adsorption is approached from a basic electrochemical
perspective. Here, depending on the pH ofthe solution, it is shown that the potential
ofthe solution dictates the species of iodine and gold-iodide complex in solution, it
affects the adsorption characteristics ofthe activated carbon.
Subjects/Keywords: Adsorption;
Carbon, Activated
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APA (6th Edition):
Teirlinck, P. A. M. (1996). The adsorption of gold from iodide solutions
. (Thesis). Cape Peninsula University of Technology. Retrieved from http://etd.cput.ac.za/handle/20.500.11838/885
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):
Teirlinck, Peter Albert Maria. “The adsorption of gold from iodide solutions
.” 1996. Thesis, Cape Peninsula University of Technology. Accessed April 11, 2021.
http://etd.cput.ac.za/handle/20.500.11838/885.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Teirlinck, Peter Albert Maria. “The adsorption of gold from iodide solutions
.” 1996. Web. 11 Apr 2021.
Vancouver:
Teirlinck PAM. The adsorption of gold from iodide solutions
. [Internet] [Thesis]. Cape Peninsula University of Technology; 1996. [cited 2021 Apr 11].
Available from: http://etd.cput.ac.za/handle/20.500.11838/885.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Teirlinck PAM. The adsorption of gold from iodide solutions
. [Thesis]. Cape Peninsula University of Technology; 1996. Available from: http://etd.cput.ac.za/handle/20.500.11838/885
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Alberta
22.
Makhtoumi, Parinaz.
Diffusion Measurements of Ethane in Activated Carbon.
Degree: MS, Department of Chemical and Materials
Engineering, 2016, University of Alberta
URL: https://era.library.ualberta.ca/files/cbr86b381s
► Increasing demand for energy in the world has made industries to look for economically efficient methods to produce energy. One possible approach is to increase…
(more)
▼ Increasing demand for energy in the world has made
industries to look for economically efficient methods to produce
energy. One possible approach is to increase natural gas
productions, due to its cleanliness and lower price. However,
energy consumption of the cryogenic processes is high in natural
gas processing plants. Adsorptive separations are becoming
widespread in various industries such as oil and gas as a promising
alternative to the conventional cryogenic processes. Activated
carbons are among the most attractive porous materials used in
adsorption processes, due to their high internal surface areas and
ease of availability in the market. They exhibit bimodal pore size
distributions, comprising microporous structure throughout a
network of larger macropores. This makes them interesting and
challenging adsorbents in adsorption studies. The separation of
ethane from natural gas is one of the important processes in gas
processing plants. Ethane is highly needed as feedstock for
ethylene production plants. In this thesis, adsorption kinetics of
ethane on activated carbon was studied using Zero Length Column
(ZLC) technique. ZLC is a useful chromatographic method to study
equilibrium and kinetics of adsorption. It is known as a fast and
easy lab-scale technique for adsorbent screenings and diffusion
studies. In ZLC, external heat and mass transfer resistances and
dispersion are eliminated by the use of low adsorbate
concentration, small amount of adsorbent and high flow rates. In
the experiments, the adsorbent sample is first pre-equilibrated
with the test gas for a sufficient time. The kinetics and
equilibrium information can be obtained from the desorption curve
when the flow is switched to pure purge gas under controlled
conditions. The experimental set-up was developed during this
project. System characterization experiments such as dead volume
measurements, detector selection, detector's response time
calculations were performed and are discussed in detail. ZLC
measurements were carried out to study the controlling diffusion
mechanism and obtain the diffusivity values. By performing low
concentration experiments, diffusion in macropores found to be the
controlling resistance. Among the various mechanisms, molecular and
Knudsen diffusion were identified to be important.
Subjects/Keywords: Ethane; Activated carbon; Diffusion; Zero length column
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APA (6th Edition):
Makhtoumi, P. (2016). Diffusion Measurements of Ethane in Activated Carbon. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/cbr86b381s
Chicago Manual of Style (16th Edition):
Makhtoumi, Parinaz. “Diffusion Measurements of Ethane in Activated Carbon.” 2016. Masters Thesis, University of Alberta. Accessed April 11, 2021.
https://era.library.ualberta.ca/files/cbr86b381s.
MLA Handbook (7th Edition):
Makhtoumi, Parinaz. “Diffusion Measurements of Ethane in Activated Carbon.” 2016. Web. 11 Apr 2021.
Vancouver:
Makhtoumi P. Diffusion Measurements of Ethane in Activated Carbon. [Internet] [Masters thesis]. University of Alberta; 2016. [cited 2021 Apr 11].
Available from: https://era.library.ualberta.ca/files/cbr86b381s.
Council of Science Editors:
Makhtoumi P. Diffusion Measurements of Ethane in Activated Carbon. [Masters Thesis]. University of Alberta; 2016. Available from: https://era.library.ualberta.ca/files/cbr86b381s
University of Waterloo
23.
Kalliath, Shalabha.
Impact of Powdered Activated Carbon on Anaerobic Membrane Bioreactors Treating Municipal Wastewater under Psychrophilic Conditions.
Degree: 2019, University of Waterloo
URL: http://hdl.handle.net/10012/14616
► The anaerobic membrane bioreactor (AnMBR) is an emerging technology, which has the potential for anaerobic digestion of wastewaters (WW) at high efficiency while generating biogas…
(more)
▼ The anaerobic membrane bioreactor (AnMBR) is an emerging technology, which has the potential for anaerobic digestion of wastewaters (WW) at high efficiency while generating biogas as a by-product (Harb et al., 2017). One of the main challenges associated with AnMBRs is reduced efficiency at low temperatures due to decreases in both bioreactor and membrane performance which makes using AnMBRs in North America impractical as WW is temperature is typically in the range of 10 – 20°C (Environment Canada, 2017).
The addition of powdered activated carbon (PAC) could be a solution to the increased fouling and low chemical…(COD) removals that occur at low temperatures as it has abrasive and adsorptive properties. There are some studies that have observed the effect of PAC on AnMBRs resulting in increased quality of permeate but none tested varying concentrations of PAC at psychrotrophic temperatures using raw WW. Hence, this was investigated in this study.
Three-lab scale AnMBRS were set up in parallel and monitored for both bioreactor and membrane parameters over a two-phase experiment. Initially the membranes were operated at 10°C and 24°C to establish the performance under mesophilic and psychrophilic conditions without the presence of PAC. Then all three reactors were converted to psychrophilic conditions and three different concentrations of PAC were added to the reactors, 0.5, 1.0, and 2.0 g/L. To determine the effect of PAC on membrane performance, transmembrane pressure (TMP) and concentrations of organic sub-fractions were monitored. Bioreactor performance was evaluated by monitoring chemical oxygen demand (COD) and suspended solids (SS) in the waste activated sludge (WAS) feed and permeate.
Stage 1 of the research showed that membrane fouling increased at psychrotrophic temperatures as the cycle lengths decreased from 9 days at 24°C to 3 days at 10°C. Similarly, the bioreactor performance also decreased significantly with the temperature drop, resulting in lower permeate quality. Overall, the results were consistent with literature reports.
Stage 2 of the experimentation revealed that adding 1.0 g/L of PAC significantly lowered the level of SCOD in the WAS and TCOD in the permeate, resulting in a higher quality of permeate. Reduced performance with 2.0 g/L of PAC was attributed to the PAC acting as both an adsorbent (non biodegradable COD & colloidal COD) and as a scouring agent. At a low concentration (0.5 g/L) of PAC the adsorptive effect was not prominent. At the highest concentrations, PAC was adsorbing and causing significant scouring as was evident through the increase in cycle lengths. However, it appears that the increased scouring reduced biofilm formation at the membrane and thus limited biodegradation that occurred on it thereby resulting in a lower quality of permeate and higher SCOD levels. Hence adding PAC at moderate concentrations was deemed to provide the best performance.
Subjects/Keywords: AnMBR; Powdered Activated Carbon; Wastewater; Psychrophilic Conditions
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APA (6th Edition):
Kalliath, S. (2019). Impact of Powdered Activated Carbon on Anaerobic Membrane Bioreactors Treating Municipal Wastewater under Psychrophilic Conditions. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/14616
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):
Kalliath, Shalabha. “Impact of Powdered Activated Carbon on Anaerobic Membrane Bioreactors Treating Municipal Wastewater under Psychrophilic Conditions.” 2019. Thesis, University of Waterloo. Accessed April 11, 2021.
http://hdl.handle.net/10012/14616.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kalliath, Shalabha. “Impact of Powdered Activated Carbon on Anaerobic Membrane Bioreactors Treating Municipal Wastewater under Psychrophilic Conditions.” 2019. Web. 11 Apr 2021.
Vancouver:
Kalliath S. Impact of Powdered Activated Carbon on Anaerobic Membrane Bioreactors Treating Municipal Wastewater under Psychrophilic Conditions. [Internet] [Thesis]. University of Waterloo; 2019. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/10012/14616.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kalliath S. Impact of Powdered Activated Carbon on Anaerobic Membrane Bioreactors Treating Municipal Wastewater under Psychrophilic Conditions. [Thesis]. University of Waterloo; 2019. Available from: http://hdl.handle.net/10012/14616
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Penn State University
24.
Hamasaki, Hiroshi.
AN EXPERIMENTAL INVESTIGATION OF MULTIPLE SULFUR ISOTOPE FRACTIONATIONS DURING HETEROGENEOUS REACTIONS BETWEEN SO2 AND ACTIVATED CARBON.
Degree: 2011, Penn State University
URL: https://submit-etda.libraries.psu.edu/catalog/12266
► Recent theoretical and experimental investigations on multiple sulfur isotope fractionations (Lasaga et al., 2008; Watanabe et al., 2009) have suggested the possible importance of reactions…
(more)
▼ Recent theoretical and experimental investigations on multiple sulfur isotope fractionations (Lasaga et al., 2008; Watanabe et al., 2009) have suggested the possible importance of reactions between solid organic compounds and oxidized sulfur species in the creation of anomalous isotope fractionation of sulfur (AIF-S) in nature. In order to understand the details of chemical and isotopic fractionation processes involving chemisorption and redox reactions, we have conducted laboratory experiments on reactions between SO2(g) and powdered
activated carbon (AC; BET surface area = ~460 m2/g) at 200° and 250 °C in a specially constructed closed system. During each of the three series of experiments, which lasted for up to 480 hours, we monitored the changes with time in pSO2(g) due to adsorption/desorption of SO2(g) on/from the AC, and periodically sampled aliquots of SO2(g) for S isotopic analyses. The SO2-reacted AC was investigated for the chemical compositions using an X-ray photoelectron spectrometer (XPS), an elemental analyzer (EA), and sequential sulfur extraction by H2O, HCl, Cr-solution, and Kiba solution, and the different forms of S-bearing compounds were analyzed for 32S, 33S, and 34S abundance ratios.
Results of experiments and analyses indicate that three kinds of S species were continuous incorporated in the AC during reaction with SO2(g) at 200-250 °C: (A) weakly adsorbed SO2 (i.e., SO2(w. ads)) which was in chemical equilibrium with SO2(g); (B) strongly adsorbed SO2 (i.e., SO2(w. ads)), which was degassed at 300-400 °C from the AC at the end of each series of adsorption/desorption experiments; and (C) non-degassable S compounds (i.e., S(NDG)). After reacting with a total of 10.97 mmoles of SO2(g), the AC obtained 0.31 mmoles of SO2(s. ads) and 1.20 mmoles of S(NDG). Approximately 60% of the S(NDG) occur as oxidized-S compounds (i.e., S-O-C compounds) that were extracted by water and recovered as BaSO3 (and/or BaSO4), ~20% as reduced-S compounds (i.e., S-C compounds) that were extracted by Cr-reducing solution, and the remaining ~20% as unidentified (but probably reduced) S-bearing) residual S-compounds that were extracted by Kiba solution. The sequence of reactions among these S-bearing clusters was estimated to be: SO2(g) ⇒ SO2(w. ads) ⇒ SO2(s. ads) ⇒ (S-O-C)AC ⇒ (S-C)AC, representing the trends of increasing S/O and S/C ratios of the AC caused by continuous oxidation of C to CO2. The bonding energy for the SO2(w. ads) was estimated to be ~17 kJ/mol.
Large kinetic isotope fractionations of sulfur isotopes occurred during the adsorption/reduction processes. Compared to the δ34S of co-existing SO2(g), the δ34S values of the oxidized S-bearing species increased to +4±1‰ for SO2(w. ads), +7.3±0.2‰ for SO2(s. ads) and +11.6±0.2‰ for S-O-C species, but the reduced-S-C species (i.e., Cr-reducible S, and the residual S) are enriched in the lighter isotopes with the δ 34S values of -8.3±0.2‰. The δ33S - δ34S relationships of the S species incorporated in the AC…
Advisors/Committee Members: Hiroshi Ohmoto, Thesis Advisor/Co-Advisor, Hiroshi Ohmoto, Thesis Advisor/Co-Advisor, Dr Yumiko Watanabe, Thesis Advisor/Co-Advisor.
Subjects/Keywords: Sulfur isotopes; adsorption; activated carbon; sulfur dioxide
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APA (6th Edition):
Hamasaki, H. (2011). AN EXPERIMENTAL INVESTIGATION OF MULTIPLE SULFUR ISOTOPE FRACTIONATIONS DURING HETEROGENEOUS REACTIONS BETWEEN SO2 AND ACTIVATED CARBON. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/12266
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):
Hamasaki, Hiroshi. “AN EXPERIMENTAL INVESTIGATION OF MULTIPLE SULFUR ISOTOPE FRACTIONATIONS DURING HETEROGENEOUS REACTIONS BETWEEN SO2 AND ACTIVATED CARBON.” 2011. Thesis, Penn State University. Accessed April 11, 2021.
https://submit-etda.libraries.psu.edu/catalog/12266.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hamasaki, Hiroshi. “AN EXPERIMENTAL INVESTIGATION OF MULTIPLE SULFUR ISOTOPE FRACTIONATIONS DURING HETEROGENEOUS REACTIONS BETWEEN SO2 AND ACTIVATED CARBON.” 2011. Web. 11 Apr 2021.
Vancouver:
Hamasaki H. AN EXPERIMENTAL INVESTIGATION OF MULTIPLE SULFUR ISOTOPE FRACTIONATIONS DURING HETEROGENEOUS REACTIONS BETWEEN SO2 AND ACTIVATED CARBON. [Internet] [Thesis]. Penn State University; 2011. [cited 2021 Apr 11].
Available from: https://submit-etda.libraries.psu.edu/catalog/12266.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hamasaki H. AN EXPERIMENTAL INVESTIGATION OF MULTIPLE SULFUR ISOTOPE FRACTIONATIONS DURING HETEROGENEOUS REACTIONS BETWEEN SO2 AND ACTIVATED CARBON. [Thesis]. Penn State University; 2011. Available from: https://submit-etda.libraries.psu.edu/catalog/12266
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of Toronto
25.
Ho, Natalie.
Modeling Hydrogen Sulfide Adsorption by Activated Carbon made from Anaerobic Digestion By-product.
Degree: 2012, University of Toronto
URL: http://hdl.handle.net/1807/32575
► Biogas, produced from anaerobic digestion of cattle manure, is an attractive alternative energy source as it is rich in methane. However, it is necessary to…
(more)
▼ Biogas, produced from anaerobic digestion of cattle manure, is an attractive alternative energy source as it is rich in methane. However, it is necessary to remove hydrogen sulfide from the biogas before it can be used in engines for electricity generation. Currently, large scale biogas systems employ physical adsorbing solvents to upgrade and purify biogas which is not economically feasible for small scale biogas systems. Activated carbon made from anaerobic
digestate proves to be an effective adsorbent of hydrogen sulfide because it has minimal operating costs and essentially zero raw material cost. A model is developed to predict the adsorption capacity, carbon bed life span, and breakthrough time for this carbon material. By analyzing the reaction constant, adsorption constant, and degradation constant, adsorption behavior under different operating conditions were studied. The model can be scaled-up to model
adsorption for biogas loading rates for small to large scale cattle farms.
MAST
Advisors/Committee Members: Kirk, Donald W., Chemical Engineering and Applied Chemistry.
Subjects/Keywords: hydrogen sulfide; adsorption; activated carbon; modeling; 0542
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APA (6th Edition):
Ho, N. (2012). Modeling Hydrogen Sulfide Adsorption by Activated Carbon made from Anaerobic Digestion By-product. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/32575
Chicago Manual of Style (16th Edition):
Ho, Natalie. “Modeling Hydrogen Sulfide Adsorption by Activated Carbon made from Anaerobic Digestion By-product.” 2012. Masters Thesis, University of Toronto. Accessed April 11, 2021.
http://hdl.handle.net/1807/32575.
MLA Handbook (7th Edition):
Ho, Natalie. “Modeling Hydrogen Sulfide Adsorption by Activated Carbon made from Anaerobic Digestion By-product.” 2012. Web. 11 Apr 2021.
Vancouver:
Ho N. Modeling Hydrogen Sulfide Adsorption by Activated Carbon made from Anaerobic Digestion By-product. [Internet] [Masters thesis]. University of Toronto; 2012. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/1807/32575.
Council of Science Editors:
Ho N. Modeling Hydrogen Sulfide Adsorption by Activated Carbon made from Anaerobic Digestion By-product. [Masters Thesis]. University of Toronto; 2012. Available from: http://hdl.handle.net/1807/32575
26.
Okuş, Fatma.
Aktif karbon ile sulu çözeltilerden myclobutanil tarım ilacının adsorpsiyonu: Myclobutani̇l pesti̇ci̇de adsorpti̇on from aqueous soluti̇on by acti̇vated carbon.
Degree: Fen Fakültesi, 2018, University of Ankara
URL: http://hdl.handle.net/20.500.12575/69292
► Yapılan çalışmada tarımsal üretimde verimin arttırılması ve hastalıkların engellenmesi için kullanılan triazol grubu pestisitlerden bir fungisit olan myclobutanil etken maddesinin sulu çözeltilerden giderimi adsorpsiyon yöntemi…
(more)
▼ Yapılan çalışmada tarımsal üretimde verimin arttırılması ve hastalıkların engellenmesi için kullanılan triazol grubu pestisitlerden bir fungisit olan myclobutanil etken maddesinin sulu çözeltilerden giderimi adsorpsiyon yöntemi ile araştırılmıştır. Adsorbent olarak yüksek oranda giderim sağladığı bilinen ticari aktif karbon kullanılmıştır. Adsorpsiyonu etkileyen en önemli parametrelerden biri olan pH değerleri esas alınarak çalışma yapılmıştır. Bunun için asidik ve bazik pH'larda (pH=3 ve pH=10) adsorpsiyon parametreleri ayrı ayrı çalışılmış ve karşılaştırılmıştır. Adsorpsiyonun Langmuir izotermine uyumlu olduğu belirlenmiş termodinamik hesaplamalardan adsorpsiyonun kendiliğinden ve ekzotermik olarak gerçekleştiği anlaşılmıştır. Ayrıca kinetik çalışmalar sonunda adsorpsiyonun yalancı ikinci derece hız modeline uygun olduğu belirlenmiştir. Deney sonunda elde edilen veriler ve hesaplamalardan elde edilen parametreler yorumlanarak önerilerde bulunulmuştur.
In this thesis report one of the triazole group fungicide aktive ingredient myclobutanil which is generally used for increase the agricultural yield and keep the product from diseases, was investigated for removal from aqueous solutions. Adsorption method has been choosen for treatment. Commercial
activated carbon was used as adsorbent because it is known with highly removal capacity. Work was done on the basis of pH which is the most important parameter that affects adsorption mechanism. On this purpose acidic and alkaline pH values (pH=3 and pH=10) was worked separetely and compared. It has been determined that adsorption is compatible with Langmuir isotherm. It has been understood from the thermodynamic calculations that adsorption occurs spontaneously and exothermically. In addition, kinetic studies have shown that adsorption is compatible with the pseudo second-order velocity model. The data obtained at the end of the experiment and the parameters obtained from the calculations were interpreted and suggested.
Advisors/Committee Members: Yıldız, Atila (advisor).
Subjects/Keywords: Aktif karbon; Myclobutanil; Activated carbon; Myclobutanil
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APA (6th Edition):
Okuş, F. (2018). Aktif karbon ile sulu çözeltilerden myclobutanil tarım ilacının adsorpsiyonu: Myclobutani̇l pesti̇ci̇de adsorpti̇on from aqueous soluti̇on by acti̇vated carbon. (Masters Thesis). University of Ankara. Retrieved from http://hdl.handle.net/20.500.12575/69292
Chicago Manual of Style (16th Edition):
Okuş, Fatma. “Aktif karbon ile sulu çözeltilerden myclobutanil tarım ilacının adsorpsiyonu: Myclobutani̇l pesti̇ci̇de adsorpti̇on from aqueous soluti̇on by acti̇vated carbon.” 2018. Masters Thesis, University of Ankara. Accessed April 11, 2021.
http://hdl.handle.net/20.500.12575/69292.
MLA Handbook (7th Edition):
Okuş, Fatma. “Aktif karbon ile sulu çözeltilerden myclobutanil tarım ilacının adsorpsiyonu: Myclobutani̇l pesti̇ci̇de adsorpti̇on from aqueous soluti̇on by acti̇vated carbon.” 2018. Web. 11 Apr 2021.
Vancouver:
Okuş F. Aktif karbon ile sulu çözeltilerden myclobutanil tarım ilacının adsorpsiyonu: Myclobutani̇l pesti̇ci̇de adsorpti̇on from aqueous soluti̇on by acti̇vated carbon. [Internet] [Masters thesis]. University of Ankara; 2018. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/20.500.12575/69292.
Council of Science Editors:
Okuş F. Aktif karbon ile sulu çözeltilerden myclobutanil tarım ilacının adsorpsiyonu: Myclobutani̇l pesti̇ci̇de adsorpti̇on from aqueous soluti̇on by acti̇vated carbon. [Masters Thesis]. University of Ankara; 2018. Available from: http://hdl.handle.net/20.500.12575/69292
University of Toronto
27.
Smith, Kyla Miriam.
Characterization of Activated Carbon for Taste and Odour Control.
Degree: 2011, University of Toronto
URL: http://hdl.handle.net/1807/29627
► Iodine number, BET surface area, taste and odour compound isotherms, and trace capacity number tests were used to rank five different granular activated carbons according…
(more)
▼ Iodine number, BET surface area, taste and odour compound isotherms, and trace capacity number tests were used to rank five different granular activated carbons according to thermodynamic adsorption performance. These tests were compared to expected activated carbon service life and loading results of rapid small-scale column tests (RSSCTs) run with water from two lake sources spiked with geosmin and 2-methylisoborneol (MIB). Trace capacity number, used to specifically identify high adsorption energy sites on activated carbon, was hypothesized to be correlated to geosmin/MIB breakthrough and loading performance of different activated carbons. This study found no such clear correlation. However, when only bituminous coal activated carbons were considered, correlations to MIB breakthrough were strengthened. Natural organic matter (NOM) adversely affected adsorption, resulting in decreased RSSCT throughput to breakthrough in surface water with higher total organic carbon (TOC). Methods for improving characterization tests and RSSCTs when NOM is present are discussed.
MAST
Advisors/Committee Members: Hofmann, Ronald, Civil Engineering.
Subjects/Keywords: activated carbon; geosmin; MIB; water treatment; 0543
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APA (6th Edition):
Smith, K. M. (2011). Characterization of Activated Carbon for Taste and Odour Control. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/29627
Chicago Manual of Style (16th Edition):
Smith, Kyla Miriam. “Characterization of Activated Carbon for Taste and Odour Control.” 2011. Masters Thesis, University of Toronto. Accessed April 11, 2021.
http://hdl.handle.net/1807/29627.
MLA Handbook (7th Edition):
Smith, Kyla Miriam. “Characterization of Activated Carbon for Taste and Odour Control.” 2011. Web. 11 Apr 2021.
Vancouver:
Smith KM. Characterization of Activated Carbon for Taste and Odour Control. [Internet] [Masters thesis]. University of Toronto; 2011. [cited 2021 Apr 11].
Available from: http://hdl.handle.net/1807/29627.
Council of Science Editors:
Smith KM. Characterization of Activated Carbon for Taste and Odour Control. [Masters Thesis]. University of Toronto; 2011. Available from: http://hdl.handle.net/1807/29627
Univerzitet u Beogradu
28.
Babić, Jelena, 1988- 21630055.
Ispitivanje uticaja odabranih filtera na koncentraciju
policikličnih aromatičnih ugljovodonika kod proizvodnje toplo
dimljenog šarana.
Degree: Fakultet veterinarske medicine, 2019, Univerzitet u Beogradu
URL: https://fedorabg.bg.ac.rs/fedora/get/o:19916/bdef:Content/get
► Veterinarska medicina - Bezbednost hrane / Veterinary medicine - Food safety
Dimlјena riba, uklјuţujuši hladno i toplo dimlјenu, ubraja se meŤu proizvode od riba ţija…
(more)
▼ Veterinarska medicina - Bezbednost hrane /
Veterinary medicine - Food safety
Dimlјena riba, uklјuţujuši hladno i toplo dimlјenu,
ubraja se meŤu proizvode od riba ţija se potrošnja znatno povešala
u svim evropskim zemljama ukljuţujuši i Srbiju. Znajuši za visoku
nutritivnu vrednost koja se ogleda u bogatstvu polinezasišenih
masnih kiselina, vitamina, minerala i proteina, kao i poţeljnih
senzornih vrednosti, ovaj proizvod dobija znaţajno mesto na našoj
trpezi. Uprkos pomenutom kvalitetu dimljene ribe, u ovakvom tipu
proizvoda postoji rizik od karcinogenih svojstava zbog prisustva
policikliţnih aromatiţnih uglјovodonika (PAH) poreklom iz dima.
Ţinjenica da dimlјena riba moţe da sadrţi karcinogena PAH
jedinjenja moţe imati znaţajan uticaj na prihvatanje ovih proizvoda
od strane potrošaţa. Radi smanjenja karcinogenog uticaja sastojaka
dima na zdravlјe potrošaţa raŤeni su ogledi u proizvodnji dimlјenog
šarana primenom filtera sa zeolitom, aktivnim uglјem i šlјunkom.
Dimlјenje je vršeno u komorama za toplo dimlјenje – TDK i „ATMOS― i
tradicionalnoj zanatskoj pušnici na razliţitim temperaturama.
Ogledi su pokazali da je koncentracija PAH jedinjenja u mesu šarana
koje je dimlјeno sa primenom filtera statistiţki znaţajno manja
nego u mesu šarana koje je dimlјeno u istim uslovima, ali bez
primene filtera. Filteri sa zeolitom i aktivnim uglјem su se
pokazali kao efikasniji u smanjenju koncentracije PAH jedinjenja u
odnosu na šlјunţani filter. Prednost je data zeolitu jer su finalni
proizvodi dobijeni primenom ovog filtera pokazali statistiţki manju
vrednost sume svih 16 ispitanih PAH jedinjenja, kao i fluorena,
antracena i pirena. Primenom razliţitih temperatura ustanovljeno je
da u procesu toplog dimlјenja nije potrebno koristiti temperaturu
višu od 63 °C sa aspekta senzornih svojstava i mikrobiološkog
statusa. U sklopu ovog nauţnog rada, prašena je i odrţivost
proizvoda toplo dimlјenog šarana upakovanog u modifikovanoj
atmosferi sa argonom i u vakuumu tokom skladištenja na temperaturi
od 4 °C. Pakovanja nisu pokazala razliţit uticaj na rok trajanja,
ali se pakovanje u modifikovanoj atmosferi sa argonom pokazalo
statistiţki bolјe u pogledu senzornih svojstava i mikrobiološkog
statusa proizvoda...
Advisors/Committee Members: Teodorović, Vlado, 1962- 12611687.
Subjects/Keywords: smoking; fish; PAH; zeolite; activated carbon;
gravel
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APA (6th Edition):
Babić, Jelena, 1. 2. (2019). Ispitivanje uticaja odabranih filtera na koncentraciju
policikličnih aromatičnih ugljovodonika kod proizvodnje toplo
dimljenog šarana. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:19916/bdef:Content/get
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):
Babić, Jelena, 1988- 21630055. “Ispitivanje uticaja odabranih filtera na koncentraciju
policikličnih aromatičnih ugljovodonika kod proizvodnje toplo
dimljenog šarana.” 2019. Thesis, Univerzitet u Beogradu. Accessed April 11, 2021.
https://fedorabg.bg.ac.rs/fedora/get/o:19916/bdef:Content/get.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Babić, Jelena, 1988- 21630055. “Ispitivanje uticaja odabranih filtera na koncentraciju
policikličnih aromatičnih ugljovodonika kod proizvodnje toplo
dimljenog šarana.” 2019. Web. 11 Apr 2021.
Vancouver:
Babić, Jelena 12. Ispitivanje uticaja odabranih filtera na koncentraciju
policikličnih aromatičnih ugljovodonika kod proizvodnje toplo
dimljenog šarana. [Internet] [Thesis]. Univerzitet u Beogradu; 2019. [cited 2021 Apr 11].
Available from: https://fedorabg.bg.ac.rs/fedora/get/o:19916/bdef:Content/get.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Babić, Jelena 12. Ispitivanje uticaja odabranih filtera na koncentraciju
policikličnih aromatičnih ugljovodonika kod proizvodnje toplo
dimljenog šarana. [Thesis]. Univerzitet u Beogradu; 2019. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:19916/bdef:Content/get
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Delft University of Technology
29.
Dacomba Torres, Pablo (author).
Fluidization behavior of granular activated carbon: For drinking water treatment applications.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:ea5e2d0c-76c5-4dd4-89b0-572ba3f71b80
► For drinking water treatment applications, it is possible to predict the external porosity of an expanded bed of granular activated carbon in fluidized conditions. A…
(more)
▼ For drinking water treatment applications, it is possible to predict the external porosity of an expanded bed of granular
activated carbon in fluidized conditions. A new model has been developed with a 2% relative prediction error. In order to supply sufficient and safe drinking water, water utilities use a treatment train consisting of several unit processes. One of these treatment unit processes is granular
activated carbon (GAC) filtration, a crucial unit process widely used for its filtration and adsorption capabilities as a barrier for undesired macro and micro-pollutants. The point of interest for this research is one of the critical steps in the filtration part of the unit process, the backwashing procedure. Backwashing is a cleaning procedure, which consists on stopping the normal operation of the filter and reversing the normal downward water flow. This upward flow leads to the expansion of the filter’s media and washes away any undesired particles caught in between and on the surface of the media. Inadequate backwashing can lead to unwanted operational outcomes, for instance, solids accumulation and mud balls or media washout, resulting in costly operational expenses. In addition, currently there is a tendency for water utilities to explore new sustainable GAC filter media, which have different expansion tendencies. These operational requirements create the need for the development of prediction models to estimate the expansion degree of the filter bed during backwash procedures. Additionally, a deep understanding of the phenomena that governs this unit process is required to increase its resiliency. The main goal of this research was to predict the expansion degree of GAC in the water phase. In order to achieve this goal, two innovative approaches combining advanced laboratory techniques and prediction models was the course of action. The first approach was the development of an input model known as the AquaGAC model, to describe the different characteristics of porous media and perform checks using calculated and measured hydraulic parameters. With the combination of the AquaGAC input model and an existing fluidization model (FBI) that computed the expressions of five classical models, the prediction of porosity of the performed experiments was achieved. The second approach consisted on using a data driven model, which consisted on the combination of the outputs the FBI and AquaGAC models with several morphological parameters to derive empirical expressions that accurately estimated the external porosity. Obtained results suggest that using the 10th percentile of the particle diameter in classical models, delivers porosity prediction errors of 10% in comparison to the 50th percentile used in practice with errors up to 25%. Based on symbolic regression, data driven models produced expressions with accurate correlations with porosity errors ranging from 2-5%. The results of this research are encouraging as the AquaGAC input model can serve as a basis for other…
Advisors/Committee Members: van der Hoek, Jan Peter (mentor), Padding, Johan (mentor), Kramer, Onno (mentor), Baars, Eric T. (mentor), de Moel, Peter (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: activated carbon; Fluidization; drinking water treatment
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APA (6th Edition):
Dacomba Torres, P. (. (2019). Fluidization behavior of granular activated carbon: For drinking water treatment applications. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:ea5e2d0c-76c5-4dd4-89b0-572ba3f71b80
Chicago Manual of Style (16th Edition):
Dacomba Torres, Pablo (author). “Fluidization behavior of granular activated carbon: For drinking water treatment applications.” 2019. Masters Thesis, Delft University of Technology. Accessed April 11, 2021.
http://resolver.tudelft.nl/uuid:ea5e2d0c-76c5-4dd4-89b0-572ba3f71b80.
MLA Handbook (7th Edition):
Dacomba Torres, Pablo (author). “Fluidization behavior of granular activated carbon: For drinking water treatment applications.” 2019. Web. 11 Apr 2021.
Vancouver:
Dacomba Torres P(. Fluidization behavior of granular activated carbon: For drinking water treatment applications. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Apr 11].
Available from: http://resolver.tudelft.nl/uuid:ea5e2d0c-76c5-4dd4-89b0-572ba3f71b80.
Council of Science Editors:
Dacomba Torres P(. Fluidization behavior of granular activated carbon: For drinking water treatment applications. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:ea5e2d0c-76c5-4dd4-89b0-572ba3f71b80
Delft University of Technology
30.
Liu, Tsz Kit (author).
Organic Micropollutant Treatment by Pre-Ozonation and Activated Carbon.
Degree: 2017, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:c23ee83e-1e93-42aa-ac80-0b95b59912bb
► Inadequate treatment of wastewater effluent is one of the major point sources of pollution of organic micropollutants (OMPs) into aquatic environments. Wastewater treatment plants need…
(more)
▼ Inadequate treatment of wastewater effluent is one of the major point sources of pollution of organic micropollutants (OMPs) into aquatic environments. Wastewater treatment plants need to be upgraded to reduce OMP contamination. Recently, the combination of pre-ozonation and granular
activated carbon (GAC) filtration has been proposed as a potential OMP treatment method. The aims of this study are to examine the treatment efficiency of selected OMPs, the effects of an ozonated feed water (second clarifier effluent) on GAC adsorption, effects of ozonation on GAC bed life and to identify the dosages of ozone for the design of a pilot plant. Batch adsorption experiments were conducted. The results show that combining the two treatment methods lead to higher elimination/removal rates of the target compounds. The data obtained in the study was used to plot adsorption isotherms and breakthrough curves to investigate the effect of ozonation on GAC bed life. The study found that ozonation reduces the adsorption capacity of the GAC for the selected compounds. Increasing the ozone dosage from 0.2 to 0.4gO3/gDOC further lowers the adsorption capacity. However, at 0.8gO3/gDOC, the adsorption capacity improves. Consequently, according to COMSOL simulations based on the LDF model, ozonation of the feed water at dosages 0.2 and 0.4 gO3/gDOC results in the breakthrough point occurring earlier than without ozonation. However, a later breakthrough point is obtained with a dosage of 0.8gO3/gDOC. This is likely due to the effect of low post-ozonation concentrations outstripping the effects of a poorer adsorption capacity. Therefore, an ozone dose of 0.8g/gDOC is recommended for the pilot plant while a lower dose could be examined to confirm the findings in this study. Further research is recommended to assess the behaviour of the oxidation by-products and their removal efficiency by GAC filtration.
Advisors/Committee Members: van der Hoek, Jan Peter (mentor), Heijman, Sebastiaan (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: organic micropollutant; ozone; activated carbon; O3GAC
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Manager
APA (6th Edition):
Liu, T. K. (. (2017). Organic Micropollutant Treatment by Pre-Ozonation and Activated Carbon. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:c23ee83e-1e93-42aa-ac80-0b95b59912bb
Chicago Manual of Style (16th Edition):
Liu, Tsz Kit (author). “Organic Micropollutant Treatment by Pre-Ozonation and Activated Carbon.” 2017. Masters Thesis, Delft University of Technology. Accessed April 11, 2021.
http://resolver.tudelft.nl/uuid:c23ee83e-1e93-42aa-ac80-0b95b59912bb.
MLA Handbook (7th Edition):
Liu, Tsz Kit (author). “Organic Micropollutant Treatment by Pre-Ozonation and Activated Carbon.” 2017. Web. 11 Apr 2021.
Vancouver:
Liu TK(. Organic Micropollutant Treatment by Pre-Ozonation and Activated Carbon. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Apr 11].
Available from: http://resolver.tudelft.nl/uuid:c23ee83e-1e93-42aa-ac80-0b95b59912bb.
Council of Science Editors:
Liu TK(. Organic Micropollutant Treatment by Pre-Ozonation and Activated Carbon. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:c23ee83e-1e93-42aa-ac80-0b95b59912bb
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