subject:(Bottoms)

1. Sousa, Inês Isabel. Assessment of reserve effect in a marine protected area: the case study of the Professor Luiz Saldanha Marine Park (Portugal).

Degree: 2011, RCAAP

URL: http://www.rcaap.pt/detail.jsp?id=oai:sapientia.ualg.pt:10400.1/2625

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Dissertação de mest., Biologia Marinha (Ecologia e Conservação Marinhas), Faculdade de Ciências e Tecnologia, Univ. do Algarve, 2011

The Professor Luiz Saldanha Marine Park (PLSMP)… (more)

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Dissertação de mest., Biologia Marinha (Ecologia e Conservação Marinhas), Faculdade de Ciências e Tecnologia, Univ. do Algarve, 2011

The Professor Luiz Saldanha Marine Park (PLSMP) is located in the central region of Portugal (Arrábida coast), comprising 38 km of coastline. It was established in 1998 and in August 2005 specific management measures were implemented. Three protection levels were established: Total – human activities not allowed; Partial - some fishing allowed with some gears (octopus traps, jigging, handline); Complementary - fishing allowed with vessels under 7m length and licensed to operate within the marine park. To monitor the reserve effect, in terms of abundance, biomass and also community composition, experimental fishing trials with trammel nets on soft bottoms have been conducted since 2007 (depths between 10 – 45m). The individuals caught were identified to species level, measured to the nearest mm and released when alive. The data (species abundance and biomass) were analyzed both with univariate and multivariate methods, allowing the comparison between the three protection levels. The data analysis showed higher values of Catch per Unit Effort (CPUE) in number and in weight for the Partial and Total protection areas when compared to the Complementary, where fishing with nets is allowed. Also the biodiversity indices (Margalef and Shannon-Wiener) showed higher values in these two areas. The multivariate analysis (ANOSIM) supports the previous results, in the sense that the communities from Partial and Total sections were found to be significantly different from the one found in the Complementary area. The SIMPER analysis showed that the bastard sole Microchirus azevia and the toadfish Halobatrachus didactylus are important contributors for the distinction of these communities. It was noticed that in assessing the reserve effect, the benefits of protection is differed from species to species. The analysis at the species level was important in the detection of trends that are probably related with the implemented protection measures. Namely the species Chelidonichthys lucerna, M. azevia and Raja clavata showed abundance increases from the first analyzed period (Aug. 2007 - Aug. 2009) to the second (Aug. 2009 - Aug. 2010), after the full implementation of the marine park. Besides the increase in abundance, C. lucerna and M. azevia also registered an increase in the median total length. Overall, the results suggest that the Partial and Total protection areas are important for several soft bottom species. The importance of protection level was confirmed by Gaussian GAM models, for both sandy and muddy bottom. This analysis also revealed water temperature as an important predictor of CPUE in weight. The results obtained include the first signs of a reserve effect concerning the soft bottoms of the Prof. Luiz Saldanha Marine Park. The protection measures, mainly the restriction on the use of trammel and gill nets, seem to benefit some bottom associated species. To better understand the reserve…

Advisors/Committee Members: Erzini, Karim, Gonçalves, Jorge.

Subjects/Keywords: Marine protected areas; Reserve effect; Arrábida; Soft bottoms

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APA (6^th Edition):

Sousa, I. I. (2011). Assessment of reserve effect in a marine protected area: the case study of the Professor Luiz Saldanha Marine Park (Portugal). (Thesis). RCAAP. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:sapientia.ualg.pt:10400.1/2625

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sousa, Inês Isabel. “Assessment of reserve effect in a marine protected area: the case study of the Professor Luiz Saldanha Marine Park (Portugal).” 2011. Thesis, RCAAP. Accessed January 25, 2021. http://www.rcaap.pt/detail.jsp?id=oai:sapientia.ualg.pt:10400.1/2625.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sousa, Inês Isabel. “Assessment of reserve effect in a marine protected area: the case study of the Professor Luiz Saldanha Marine Park (Portugal).” 2011. Web. 25 Jan 2021.

Vancouver:

Sousa II. Assessment of reserve effect in a marine protected area: the case study of the Professor Luiz Saldanha Marine Park (Portugal). [Internet] [Thesis]. RCAAP; 2011. [cited 2021 Jan 25]. Available from: http://www.rcaap.pt/detail.jsp?id=oai:sapientia.ualg.pt:10400.1/2625.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sousa II. Assessment of reserve effect in a marine protected area: the case study of the Professor Luiz Saldanha Marine Park (Portugal). [Thesis]. RCAAP; 2011. Available from: http://www.rcaap.pt/detail.jsp?id=oai:sapientia.ualg.pt:10400.1/2625

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Queens University

2. Gyasi, Justice. Comparative Study of the Effects of Physical and Chemical Aging on Extracted and Recovered Asphalt Binders from Some Municipal and Provincial Roads in Canada .

Degree: Chemistry, Queens University

URL: http://hdl.handle.net/1974/24008

► It has been reported that estimated pavement lifecycles have been reduced by 50-60 % in Ontario over the last 25 years (Auditor General of Ontario,… (more)

▼ It has been reported that estimated pavement lifecycles have been reduced by 50-60 % in Ontario over the last 25 years (Auditor General of Ontario, 2016). This raises issues of concern with respect to durability and performance among others. This document aims to comparatively study the effects of physical and chemical aging on the performance of extracted and recovered loose-mix and core mix samples from some provincial and municipal contracts in Ontario. In this study, four loose-mix (plant-aged) and eight core-mix (field-aged, 4 - 5 years) samples were cautiously extracted and recovered using dichloromethane and standard rotary evaporation in a moderate to high vacuum, nitrogen atmosphere and final bath temperature of 160 °C for one hour. The binders recovered from the loose-mix samples were taken through laboratory aging using the standard Superpave® pressure aging vessel method and all the samples were evaluated for their performance using conventional Superpave® methods such as Dynamic Shear Rheometer (DSR) and Bending Beam Rheometer (BBR) and the improved Ministry of Transportation of Ontario methods (LS-308 Extended Bending Beam Rheometer (eBBR) and LS-299 Double-Edge Notched Tension (DENT) test). Chemical test methods like Fourier Transform Infra-red (FTIR) spectroscopy and X-ray Fluorescence (XRF) analysis were used to determine the presence of carbonyls, sulfoxides, zinc and molybdenum which result from chemical oxidation and the addition of recycled engine oil bottoms (REOB). The significant amount of zinc and molybdenum found in all the samples could be a result of addition of REOB, which is known to accelerate the process of physical and chemical aging. All the binders recovered from the loose-mix samples showed better performance based on their performance grading using the dynamic shear rheometer, extended bending beam rheometer and double-edge notched tension test at low, intermediate and high temperatures. Their durability is however suspect since they contained significant amounts of zinc, molybdenum, carbonyls and sulfoxides known to be ‘aging accelerators’. All the field-aged (4-5 yrs.) samples but one showed poor performance at low, intermediate and high temperature which is explained by the comparatively higher amount of zinc, molybdenum, carbonyls and sulfoxides found in them. The extended bending beam rheometer (eBBR) method was seen as a more efficient quality control indicator since some of the samples which passed the regular bending beam rheometer method failed the extended bending beam rheometer test based on the grade losses.

Subjects/Keywords: Physical Aging ; Chemical Aging ; Recycled Engine Oil Bottoms

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APA (6^th Edition):

Gyasi, J. (n.d.). Comparative Study of the Effects of Physical and Chemical Aging on Extracted and Recovered Asphalt Binders from Some Municipal and Provincial Roads in Canada . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/24008

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Gyasi, Justice. “Comparative Study of the Effects of Physical and Chemical Aging on Extracted and Recovered Asphalt Binders from Some Municipal and Provincial Roads in Canada .” Thesis, Queens University. Accessed January 25, 2021. http://hdl.handle.net/1974/24008.

Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Gyasi, Justice. “Comparative Study of the Effects of Physical and Chemical Aging on Extracted and Recovered Asphalt Binders from Some Municipal and Provincial Roads in Canada .” Web. 25 Jan 2021.

Note: this citation may be lacking information needed for this citation format:
No year of publication.

Vancouver:

Gyasi J. Comparative Study of the Effects of Physical and Chemical Aging on Extracted and Recovered Asphalt Binders from Some Municipal and Provincial Roads in Canada . [Internet] [Thesis]. Queens University; [cited 2021 Jan 25]. Available from: http://hdl.handle.net/1974/24008.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Council of Science Editors:

Gyasi J. Comparative Study of the Effects of Physical and Chemical Aging on Extracted and Recovered Asphalt Binders from Some Municipal and Provincial Roads in Canada . [Thesis]. Queens University; Available from: http://hdl.handle.net/1974/24008

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Ohio University

3. Toth, Charles A. A Bottoms-Up Approach to Cost Estimation Using Parametric Inputs.

Degree: MS, Electrical Engineering & Computer Science (Engineering and Technology), 2005, Ohio University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1131119775

► This paper begins by discussing how a generic cost estimator is created, combining the ease of use of parametric cost estimation while maintaining the… (more)

Subjects/Keywords: Cost Estimation; Bottoms-Up; Process Based; Parametric

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APA (6^th Edition):

Toth, C. A. (2005). A Bottoms-Up Approach to Cost Estimation Using Parametric Inputs. (Masters Thesis). Ohio University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1131119775

Chicago Manual of Style (16^th Edition):

Toth, Charles A. “A Bottoms-Up Approach to Cost Estimation Using Parametric Inputs.” 2005. Masters Thesis, Ohio University. Accessed January 25, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1131119775.

MLA Handbook (7^th Edition):

Toth, Charles A. “A Bottoms-Up Approach to Cost Estimation Using Parametric Inputs.” 2005. Web. 25 Jan 2021.

Vancouver:

Toth CA. A Bottoms-Up Approach to Cost Estimation Using Parametric Inputs. [Internet] [Masters thesis]. Ohio University; 2005. [cited 2021 Jan 25]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1131119775.

Council of Science Editors:

Toth CA. A Bottoms-Up Approach to Cost Estimation Using Parametric Inputs. [Masters Thesis]. Ohio University; 2005. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1131119775

4. Cuypers, C. Bioavailability of polycyclic aromatic hydrocarbons in soils and sediments: prediction of bioavailability and characterization of organic matter domains.

Degree: 2001, NARCIS

URL: http://library.wur.nl/WebQuery/wurpubs/110508 ; urn:nbn:nl:ui:32-110508 ; urn:nbn:nl:ui:32-110508 ; http://library.wur.nl/WebQuery/wurpubs/110508

► Polycyclic aromatic hydrocarbons (PAHs) constitute a group of priority pollutants which are of increasing environmental concern because of their adverse effects on humans, animals, and… (more)

▼ Polycyclic aromatic hydrocarbons (PAHs) constitute a group of priority pollutants which are of increasing environmental concern because of their adverse effects on humans, animals, and plants. Soils and sediments generally serve as a sink for PAHs, which leads to the accumulation of PAHs at contaminated sites. In the last decade, bioremediation has been frequently used for the clean-up of such contaminated sites. However, despite the common use and cost-effectiveness of bioremediation, it is generally observed that a residual fraction remains undegraded even when optimal biodegradation conditions have been provided. In many cases the recalcitrance of this residual fraction is caused by a limited bioavailability of PAHs. The present thesis focuses on the development of simple and rapid laboratory methods for the prediction of PAH bioavailability. As an integrated part of this study, it was aimed to expand the current knowledge on the structure of amorphous and condensed soil/sediment organic matter (SOM) domains. It is believed that PAHs sorbed in amorphous domains are readily bioavailable, while PAHs sorbed in condensed domains are poorly bioavailable. Three different methods were investigated for the prediction of PAH bioavailability: persulfate oxidation, cyclodextrin extraction, and surfactant extraction. Persulfate oxidation appeared to be a good and rapid method for the prediction of PAH bioavailability. It was demonstrated that a 3 hour oxidation at 70 ^o C was sufficient for the removal of all bioavailable PAHs. The oxidation method was successfully validated in a study with 14 historically contaminated soil and sediment samples. Cyclodextrin extraction and surfactant extraction were investigated in a study with two sediment samples, using hydroxypropyl-b-cyclodextrin and Triton X-100 (surfactant) as model compounds. It was demonstrated that hydroxypropyl-β-cyclodextrin extracted primarily readily bioavailable PAHs, while Triton X-100 extracted both readily and poorly bioavailable PAHs. Moreover, hydroxypropyl-β-cyclodextrin did not affect the biodegradation of PAHs, while Triton X-100 enhanced the degradation of low molecular weight PAHs. Altogether, it may be concluded that persulfate oxidation currently provides the most rapid validated method for the prediction of PAH bioavailability in soils and sediments. To study the composition of amorphous and condensed SOM domains, two different approaches were followed: (i) samples were subjected to persulfate oxidation to remove amorphous SOM, before and after which the composition of SOM was studied by thermogravimetric analysis, pyrolysis-GC/MS, and CPMAS 13C-NMR; (ii) samples were split in two parts, one part was bioremediated to remove bioavailable PAHs, and both the bioremediated and non-bioremediated part were subjected to 9 different chemical treatments with a known effect on SOM structure. Before and after chemical treatment PAH concentrations and PAH bioavailability were measured. The two approaches led to the following general conclusions on the… Advisors/Committee Members: Wageningen University, W.H. Rulkens, J.T.C. Grotenhuis.

Subjects/Keywords: polycyclische koolwaterstoffen; biologische beschikbaarheid; organisch bodemmateriaal; waterbodems; Bodemverontreiniging; Bodemchemie; polycyclic hydrocarbons; bioavailability; soil organic matter; water bottoms; Soil Pollution; Soil Chemistry

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APA (6^th Edition):

Cuypers, C. (2001). Bioavailability of polycyclic aromatic hydrocarbons in soils and sediments: prediction of bioavailability and characterization of organic matter domains. (Doctoral Dissertation). NARCIS. Retrieved from http://library.wur.nl/WebQuery/wurpubs/110508 ; urn:nbn:nl:ui:32-110508 ; urn:nbn:nl:ui:32-110508 ; http://library.wur.nl/WebQuery/wurpubs/110508

Chicago Manual of Style (16^th Edition):

Cuypers, C. “Bioavailability of polycyclic aromatic hydrocarbons in soils and sediments: prediction of bioavailability and characterization of organic matter domains.” 2001. Doctoral Dissertation, NARCIS. Accessed January 25, 2021. http://library.wur.nl/WebQuery/wurpubs/110508 ; urn:nbn:nl:ui:32-110508 ; urn:nbn:nl:ui:32-110508 ; http://library.wur.nl/WebQuery/wurpubs/110508.

MLA Handbook (7^th Edition):

Cuypers, C. “Bioavailability of polycyclic aromatic hydrocarbons in soils and sediments: prediction of bioavailability and characterization of organic matter domains.” 2001. Web. 25 Jan 2021.

Vancouver:

Cuypers C. Bioavailability of polycyclic aromatic hydrocarbons in soils and sediments: prediction of bioavailability and characterization of organic matter domains. [Internet] [Doctoral dissertation]. NARCIS; 2001. [cited 2021 Jan 25]. Available from: http://library.wur.nl/WebQuery/wurpubs/110508 ; urn:nbn:nl:ui:32-110508 ; urn:nbn:nl:ui:32-110508 ; http://library.wur.nl/WebQuery/wurpubs/110508.

Council of Science Editors:

Cuypers C. Bioavailability of polycyclic aromatic hydrocarbons in soils and sediments: prediction of bioavailability and characterization of organic matter domains. [Doctoral Dissertation]. NARCIS; 2001. Available from: http://library.wur.nl/WebQuery/wurpubs/110508 ; urn:nbn:nl:ui:32-110508 ; urn:nbn:nl:ui:32-110508 ; http://library.wur.nl/WebQuery/wurpubs/110508

5. Slomp, C.P. Early diagenesis of phosphorus in continental margin sediments.

Degree: 1997, Agricultural University

URL: http://library.wur.nl/WebQuery/wurpubs/38839 ; urn:nbn:nl:ui:32-38839 ; urn:nbn:nl:ui:32-38839 ; http://library.wur.nl/WebQuery/wurpubs/38839

► Most of the organic material in the oceans that reaches the sea floor is deposited on continental margins and not in the deep sea.… (more)

▼ Most of the organic material in the oceans that reaches the sea floor is deposited on continental margins and not in the deep sea. This organic matter is the principal carrier of phosphorus (P) to sediments. A part of the organic material is buried definitely. The other part decomposes, resulting in a release of dissolved HP0 ₄^2-to the pore water. This HP0 ₄^2-either returns to the overlying water and becomes available for uptake by phytoplankton, or is retained in the sediment in an organic or inorganic form. Quantification of the P release from and P retention in sediments on relatively short time scales of days to years is necessary for a correct understanding of the nutrient dynamics in regional seas such as, for example, the North Sea. An accurate assessment of the modem global ocean burial flux of reactive P (i.e potentially bioavailable P) and the burial flux in the geological past is important for understanding the global oceanic P cycle. This, in turn, can provide insight in possible controls on organic C burial and atmospheric concentrations of C0 ₂ and 0 ₂ , because P may limit oceanic primary production and thus determine the amount of organic material in the oceans on geological time scales. The research presented in this thesis concentrates on the short-term processes controlling sediment P release and retention in temperate, non-upwelling, continental margin environments. The research commenced with a laboratory study on the effect of organic matter deposition and macrofauna on sediment-water exchange and retention of P in Fe oxide-poor, sandy sediments (Chapter 2). A suspension of dead algal cells (Phaeocystis sp.) was applied to sediment in experimental systems (boxcosms), either once or every week during 19 weeks. The results demonstrate that deposition of organic matter on this type of sediment enhances pore water concentrations and sediment-water exchange of HP0 ₄^2-. The enhanced HP0 ₄^2-release was due to microbially mediated mineralization of the organic material and due to direct release of HP0 ₄^2-from the algal cells (lysis). A major portion of the algal material remained at the sediment-water interface and this organic layer probably regulated the sediment-water exchange of HP0 ₄^2-directly. The activity of the macrofauna was mainly limited to reworking of the sediment. The effect of the macrofauna on the sediment-water exchange Of HP0 ₄^2-was negligible. In the boxcosms to which organic material was added only once, the concentration of NaOH-extractable sediment P increased following the addition, especially in the presence of macrofauna. Sorption of P to Fe oxides is the most important short-term process responsible for the retention of P in sediments. Using a combination of differential X-ray diffraction (DXRD) and extraction procedures, the character of the Fe oxides that bind P in 4 North Sea… Advisors/Committee Members: L. Lijklema, W. van Raaphorst.

Subjects/Keywords: fosfor; gesteenten; sedimentmaterialen; adsorptie; sorptie; noordzee; waterbodems; Geologie (algemeen); phosphorus; rocks; sedimentary materials; adsorption; sorption; north sea; water bottoms; Geology (General)

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APA (6^th Edition):

Slomp, C. P. (1997). Early diagenesis of phosphorus in continental margin sediments. (Doctoral Dissertation). Agricultural University. Retrieved from http://library.wur.nl/WebQuery/wurpubs/38839 ; urn:nbn:nl:ui:32-38839 ; urn:nbn:nl:ui:32-38839 ; http://library.wur.nl/WebQuery/wurpubs/38839

Chicago Manual of Style (16^th Edition):

Slomp, C P. “Early diagenesis of phosphorus in continental margin sediments.” 1997. Doctoral Dissertation, Agricultural University. Accessed January 25, 2021. http://library.wur.nl/WebQuery/wurpubs/38839 ; urn:nbn:nl:ui:32-38839 ; urn:nbn:nl:ui:32-38839 ; http://library.wur.nl/WebQuery/wurpubs/38839.

MLA Handbook (7^th Edition):

Slomp, C P. “Early diagenesis of phosphorus in continental margin sediments.” 1997. Web. 25 Jan 2021.

Vancouver:

Slomp CP. Early diagenesis of phosphorus in continental margin sediments. [Internet] [Doctoral dissertation]. Agricultural University; 1997. [cited 2021 Jan 25]. Available from: http://library.wur.nl/WebQuery/wurpubs/38839 ; urn:nbn:nl:ui:32-38839 ; urn:nbn:nl:ui:32-38839 ; http://library.wur.nl/WebQuery/wurpubs/38839.

Council of Science Editors:

Slomp CP. Early diagenesis of phosphorus in continental margin sediments. [Doctoral Dissertation]. Agricultural University; 1997. Available from: http://library.wur.nl/WebQuery/wurpubs/38839 ; urn:nbn:nl:ui:32-38839 ; urn:nbn:nl:ui:32-38839 ; http://library.wur.nl/WebQuery/wurpubs/38839

Universitat de Girona

6. Joher Sais, Sergi. Macroalgal-dominated coastal detritic bottoms of the Mediterranean Sea and the Northeastern Atlantic: description, distribution and sampling methodologies.

Degree: Departament de Ciències Ambientals, 2016, Universitat de Girona

URL: http://hdl.handle.net/10803/385353

► This thesis aims to describe the main algal-dominated coastal detritic bottoms of the continental shelf off Mallorca and Menorca (Balearic Islands, Spain), and provide effective… (more)

Subjects/Keywords: Macroalgues; Macroalgae; Macroalgas; Fons detrítics; Detritic bottoms; Fondos detríticos; Mar Mediterrània; Mediterranean sea; Mar Mediterráneo; Illes Balears; Balearic Islands; Islas Baleares; Atlàntic Nord-oriental; Northeastern Atlantic; NE Atlántico; 504; 574; 58

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APA (6^th Edition):

Joher Sais, S. (2016). Macroalgal-dominated coastal detritic bottoms of the Mediterranean Sea and the Northeastern Atlantic: description, distribution and sampling methodologies. (Thesis). Universitat de Girona. Retrieved from http://hdl.handle.net/10803/385353

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Joher Sais, Sergi. “Macroalgal-dominated coastal detritic bottoms of the Mediterranean Sea and the Northeastern Atlantic: description, distribution and sampling methodologies.” 2016. Thesis, Universitat de Girona. Accessed January 25, 2021. http://hdl.handle.net/10803/385353.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Joher Sais, Sergi. “Macroalgal-dominated coastal detritic bottoms of the Mediterranean Sea and the Northeastern Atlantic: description, distribution and sampling methodologies.” 2016. Web. 25 Jan 2021.

Vancouver:

Joher Sais S. Macroalgal-dominated coastal detritic bottoms of the Mediterranean Sea and the Northeastern Atlantic: description, distribution and sampling methodologies. [Internet] [Thesis]. Universitat de Girona; 2016. [cited 2021 Jan 25]. Available from: http://hdl.handle.net/10803/385353.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Joher Sais S. Macroalgal-dominated coastal detritic bottoms of the Mediterranean Sea and the Northeastern Atlantic: description, distribution and sampling methodologies. [Thesis]. Universitat de Girona; 2016. Available from: http://hdl.handle.net/10803/385353

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Uppsala University

7. Ljungberg, Jennie. Consequences of stagnant algal mats for the benthic fauna on shallow soft bottoms at northern Gotland, Baltic Sea.

Degree: Biology Education Centre, 2015, Uppsala University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-264430

► Earlier studies have shown that dense drifting algal mats influence the marine benthic fauna negatively. The purpose of this study was to evaluate the… (more)

Subjects/Keywords: Baltic Sea; Benthic fauna; Drifting algae; Algal mats; Soft bottoms; Shallow bays; Bare sand; Oxygen levels; Fish; Östersjön; Bottenfauna; Kringdrivande alger; Algmatta; Mjukbotten; Grunda havsvikar; Sand; Syre nivå; Fisk; Ecology; Ekologi

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APA (6^th Edition):

Ljungberg, J. (2015). Consequences of stagnant algal mats for the benthic fauna on shallow soft bottoms at northern Gotland, Baltic Sea. (Thesis). Uppsala University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-264430

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Ljungberg, Jennie. “Consequences of stagnant algal mats for the benthic fauna on shallow soft bottoms at northern Gotland, Baltic Sea.” 2015. Thesis, Uppsala University. Accessed January 25, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-264430.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Ljungberg, Jennie. “Consequences of stagnant algal mats for the benthic fauna on shallow soft bottoms at northern Gotland, Baltic Sea.” 2015. Web. 25 Jan 2021.

Vancouver:

Ljungberg J. Consequences of stagnant algal mats for the benthic fauna on shallow soft bottoms at northern Gotland, Baltic Sea. [Internet] [Thesis]. Uppsala University; 2015. [cited 2021 Jan 25]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-264430.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ljungberg J. Consequences of stagnant algal mats for the benthic fauna on shallow soft bottoms at northern Gotland, Baltic Sea. [Thesis]. Uppsala University; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-264430

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Tech

8. Teye, Frederick David. Continuous flash extraction of alcohols from fermentation broth.

Degree: MS, Biological Systems Engineering, 2009, Virginia Tech

URL: http://hdl.handle.net/10919/31418

► A new method of in situ extraction of alcohols from fermentation broth was investigated. The extraction method exploited the latent advantages of the non-equilibrium phase… (more)

▼ A new method of in situ extraction of alcohols from fermentation broth was investigated. The extraction method exploited the latent advantages of the non-equilibrium phase interaction of the fluid system in the flash tank to effectively recover the alcohol. Carbon dioxide gas ranging from 4.2L/min to 12.6L/min was used to continuously strip 2 and 12% (v/v) ethanol solution in a fermentor with a recycle. Ethanol and water in the stripped gas was recovered by compressing and then flashing into a flash tank that was maintained at 5 to 70bar and 5 to 55 °C where two immiscible phases comprising CO2-rich phase (top layer) and H2O-rich phase (bottom layer) were formed. The H2O-rich bottom layer was collected as the Bottoms. The CO2-rich phase was continuously throttled producing a condensate (Tops) as a result of the Joule-Thompson cooling effect. The total ethanol recovered from the extraction scheme was 46.0 to 80% for the fermentor containing 2% (v/v) ethanol and 57 to 89% for the fermentor containing 12% (v/v) ethanol. The concentration of ethanol in the Bottoms ranged from 8.0 to 14.9 %(v/v) for the extraction from the 2 %(v/v) ethanol solution and 40.0 to 53.8 %(v/v) for the 12% (v/v) fermentor ethanol extraction. The Bottoms concentration showed a fourfold increase compared to the feed. The ethanol concentration of the Tops were much higher with the highest at approx. 90% (v/v) ethanol, however the yields were extremely low. Compression work required ranged from 6.4 to 20.1 MJ/kg ethanol recovered from the gas stream in the case of 12% (v/v) ethanol in fermentor. The energy requirement for the 2% (v/v) extraction was 84MJ/kg recovered ethanol. The measured Joule-Thompson cooling effect for the extraction scheme was in the range of 10 to 20% the work of compressing the gas. The lowest measured throttle valve temperature was -47 °C at the flash tank conditions of 70bar and 25 °C. Optimization of the extraction scheme showed that increasing the temperature of the flash tank reduced the amount of ethanol recovered. Increasing the pressure of the flash tank increased the total ethanol recovered but beyond 45bar it appeared to reduce the yield. The 12.6L/min carbon dioxide flow rate favored the high pressure(70bar) extraction whiles 4.2L/min appeared to favor the low pressure(40bar) extraction. The studies showed that the extraction method could potentially be used to recover ethanol and other fermentation products. Advisors/Committee Members: Agblevor, Foster Aryi (committeechair), Zhang, Chenming Mike (committee member), Achenie, Luke E. K. (committee member).

Subjects/Keywords: saturation temperature; equilibrium; Flashing; Bottoms; Tops; critical pressure; gas partition; Joule-Thompson coefficient; critical temperature; isothermal flash tank; throttling; saturation pressure

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APA (6^th Edition):

Teye, F. D. (2009). Continuous flash extraction of alcohols from fermentation broth. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/31418

Chicago Manual of Style (16^th Edition):

Teye, Frederick David. “Continuous flash extraction of alcohols from fermentation broth.” 2009. Masters Thesis, Virginia Tech. Accessed January 25, 2021. http://hdl.handle.net/10919/31418.

MLA Handbook (7^th Edition):

Teye, Frederick David. “Continuous flash extraction of alcohols from fermentation broth.” 2009. Web. 25 Jan 2021.

Vancouver:

Teye FD. Continuous flash extraction of alcohols from fermentation broth. [Internet] [Masters thesis]. Virginia Tech; 2009. [cited 2021 Jan 25]. Available from: http://hdl.handle.net/10919/31418.

Council of Science Editors:

Teye FD. Continuous flash extraction of alcohols from fermentation broth. [Masters Thesis]. Virginia Tech; 2009. Available from: http://hdl.handle.net/10919/31418

9. Miles, Debra A. (Debra Ann). An Analysis of Robert Nathaniel Dett's In the Bottoms.

Degree: 1983, North Texas State University

URL: https://digital.library.unt.edu/ark:/67531/metadc504233/

► The purpose of the thesis is to analyze formally, harmonically and melodically the five movements of the suite both as separate movements and inclusively as… (more)

Subjects/Keywords: music theory; piano music; piano compositions; Dett, R. Nathaniel (Robert Nathaniel), 1882-1943 – In the bottoms.

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APA (6^th Edition):

Miles, D. A. (. A. (1983). An Analysis of Robert Nathaniel Dett's In the Bottoms. (Thesis). North Texas State University. Retrieved from https://digital.library.unt.edu/ark:/67531/metadc504233/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Miles, Debra A (Debra Ann). “An Analysis of Robert Nathaniel Dett's In the Bottoms.” 1983. Thesis, North Texas State University. Accessed January 25, 2021. https://digital.library.unt.edu/ark:/67531/metadc504233/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Miles, Debra A (Debra Ann). “An Analysis of Robert Nathaniel Dett's In the Bottoms.” 1983. Web. 25 Jan 2021.

Vancouver:

Miles DA(A. An Analysis of Robert Nathaniel Dett's In the Bottoms. [Internet] [Thesis]. North Texas State University; 1983. [cited 2021 Jan 25]. Available from: https://digital.library.unt.edu/ark:/67531/metadc504233/.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Miles DA(A. An Analysis of Robert Nathaniel Dett's In the Bottoms. [Thesis]. North Texas State University; 1983. Available from: https://digital.library.unt.edu/ark:/67531/metadc504233/

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

10. Woodard, William Brett. West Bottoms 2048: growing an urban district through intermediate natures.

Degree: Master of Landscape Architecture, Department of Landscape Architecture and Regional & Community Planning, 2013, Kansas State University

URL: http://hdl.handle.net/2097/15793

► The Kansas City downtown area is experiencing a population influx, which is projected to increase over the next few decades, requiring new residential areas and… (more)

Subjects/Keywords: West Bottoms, Kansas City; Intermediate natures; Sustainable parks; Underutilized land; Redevelopment; Landscape Architecture (0390)

…xv James Park Master Plan 54 Project Location xvi District Framework 56 West Bottoms… …Bottoms 4 Phase 01 82 Problems In and Around the West Bottoms 5 Phase 02 86 Solving Area… …20 04 PARK SPACES 52 102 104 KCDA Park Suitability 22 Past West Bottoms Studies 24… …Tallgrass Learning Trail 110 West Bottoms Inventory & Analysis 26 Business Park 112 Site… …Traffic Circulation (28) 00 PROLOGUE Figure 2.07: West Bottoms Activity (29…

10 more images…

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APA (6^th Edition):

Woodard, W. B. (2013). West Bottoms 2048: growing an urban district through intermediate natures. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/15793

Chicago Manual of Style (16^th Edition):

Woodard, William Brett. “West Bottoms 2048: growing an urban district through intermediate natures.” 2013. Masters Thesis, Kansas State University. Accessed January 25, 2021. http://hdl.handle.net/2097/15793.

MLA Handbook (7^th Edition):

Woodard, William Brett. “West Bottoms 2048: growing an urban district through intermediate natures.” 2013. Web. 25 Jan 2021.

Vancouver:

Woodard WB. West Bottoms 2048: growing an urban district through intermediate natures. [Internet] [Masters thesis]. Kansas State University; 2013. [cited 2021 Jan 25]. Available from: http://hdl.handle.net/2097/15793.

Council of Science Editors:

Woodard WB. West Bottoms 2048: growing an urban district through intermediate natures. [Masters Thesis]. Kansas State University; 2013. Available from: http://hdl.handle.net/2097/15793

11. Noordkamp, E.R. Remediation of soils, sediments and sludges by extraction with organic solvents.

Degree: 1999, Agricultural University

URL: http://library.wur.nl/WebQuery/wurpubs/62557 ; urn:nbn:nl:ui:32-62557 ; urn:nbn:nl:ui:32-62557 ; http://library.wur.nl/WebQuery/wurpubs/62557

► Remediation of contaminated soils, sediments and sludges by extraction with organic solvents is still in the initial stages of development. So far hardly any… (more)

▼ Remediation of contaminated soils, sediments and sludges by extraction with organic solvents is still in the initial stages of development. So far hardly any scientific research has been carried out into this approach. Therefore, the main objective of the present investigation was to study the effect of several process parameters on the efficiency of the extraction step of a solvent extraction process for soils, sediments and sludges (generally indicated as solids) contaminated with polycyclic aromatic hydrocarbons (PAHs). The process parameters of interest were: type of solvent, extraction time, extraction procedure, water content of the extraction solvent, type of solids, size of the solid particles, and water content of the solids. In the development of a remediation method, a critical factor is the analysis of the PAH concentration in the solids. Therefore, several extraction methods were investigated to remove PAHs from an aged sandy soil, a harbour sediment and an extraction sludge. Extraction with N-methyl-2-pyrrolidinone in a microwave oven at 130°C for one hour was the most efficient method for the extraction of PAHs. The second best method was extraction with a mixture of 80 vol.% acetone and 20 vol.% water in a microwave oven at 100°C for one hour. Acetone is suitable for use in a solvent extraction process, because it is less toxic than most other organic solvents, easily biodegradable, and socially acceptable in the Netherlands. In addition, it showed high removal efficiencies in the extraction of spiked pyrene and benzo[a]pyrene from sandy, silty and clayey soils, even when water was present in the soil or extraction agent. In the extraction of air-dried soil with mixtures of acetone and water, maximum efficiencies were reached with 10 to 20 vol.% water in the mixture. To determine the extraction efficiency of a mixture of 80 vol.% acetone and 20 vol.% water, a procedure comprising seven extraction steps was carried out at 20°C using a rotary tumbler for mixing. In this way, an aged extraction sludge and an aged harbour sediment were remediated. After seven extractions, the Dutch target level established for clean soil was reached in the sludge and almost reached in the sediment. The PAH concentrations decreased from about 1,000 mg kg ^-1in the sludge and about 650 mg kg ^-1in the sediment to about 2 mg kg ^-1in both the sludge and the sediment. Of the PAHs studied, those of low molecular weight (phenanthrene, anthracene and fluoranthene) were found to be most difficult to remove from the solids. Another important aspect of the extraction process is the rate at which PAHs are removed. Experiments revealed that about 90% of the PAHs concerned were desorbed from the aged sludge within 10 minutes of extraction with a mixture of 80 vol.% acetone and 20 vol.% water. Within 40 minutes, at least 95% of the PAHs concerned were removed from the sludge and the extraction was then assumed to be complete. The experimental desorption curves were fitted by… Advisors/Committee Members: W.H. Rulkens, J.T.C. Grotenhuis.

Subjects/Keywords: slib; volksgezondheidsbevordering; aromatische koolwaterstoffen; aceton; oplosmiddelen; extractie; waterbodems; Bodemverontreiniging; Milieutechnologie; sludges; sanitation; aromatic hydrocarbons; acetone; solvents; extraction; water bottoms; Soil Pollution; Environmental Engineering

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APA (6^th Edition):

Noordkamp, E. R. (1999). Remediation of soils, sediments and sludges by extraction with organic solvents. (Doctoral Dissertation). Agricultural University. Retrieved from http://library.wur.nl/WebQuery/wurpubs/62557 ; urn:nbn:nl:ui:32-62557 ; urn:nbn:nl:ui:32-62557 ; http://library.wur.nl/WebQuery/wurpubs/62557

Chicago Manual of Style (16^th Edition):

Noordkamp, E R. “Remediation of soils, sediments and sludges by extraction with organic solvents.” 1999. Doctoral Dissertation, Agricultural University. Accessed January 25, 2021. http://library.wur.nl/WebQuery/wurpubs/62557 ; urn:nbn:nl:ui:32-62557 ; urn:nbn:nl:ui:32-62557 ; http://library.wur.nl/WebQuery/wurpubs/62557.

MLA Handbook (7^th Edition):

Noordkamp, E R. “Remediation of soils, sediments and sludges by extraction with organic solvents.” 1999. Web. 25 Jan 2021.

Vancouver:

Noordkamp ER. Remediation of soils, sediments and sludges by extraction with organic solvents. [Internet] [Doctoral dissertation]. Agricultural University; 1999. [cited 2021 Jan 25]. Available from: http://library.wur.nl/WebQuery/wurpubs/62557 ; urn:nbn:nl:ui:32-62557 ; urn:nbn:nl:ui:32-62557 ; http://library.wur.nl/WebQuery/wurpubs/62557.

Council of Science Editors:

Noordkamp ER. Remediation of soils, sediments and sludges by extraction with organic solvents. [Doctoral Dissertation]. Agricultural University; 1999. Available from: http://library.wur.nl/WebQuery/wurpubs/62557 ; urn:nbn:nl:ui:32-62557 ; urn:nbn:nl:ui:32-62557 ; http://library.wur.nl/WebQuery/wurpubs/62557

12. Tolkamp, H.H. Organism-substrate relationships in lowland streams.

Degree: 1980, Landbouwhogeschool Wageningen

URL: http://library.wur.nl/WebQuery/wurpubs/74813 ; urn:nbn:nl:ui:32-74813 ; urn:nbn:nl:ui:32-74813 ; http://library.wur.nl/WebQuery/wurpubs/74813

► A field and laboratory study on the microdistribution of bottom dwelling macroinvertebrates to investigate the role of the stream substrate In the development and preservation… (more)

▼ A field and laboratory study on the microdistribution of bottom dwelling macroinvertebrates to investigate the role of the stream substrate In the development and preservation of the macroinvertebrate communities in natural, undisturbed lowland streams is described. Field data on bottom substrates and fauna wore collected between 1975 and 1978 from two Dutch lowland streams. Substrates were characterized by the nature and the amount of organic detritus and the mineral particle sizes: in a field classification on the basis of the visually dominant particle sizes; in a grain-size classification on the basis of exact particle-size analysis in the laboratory. Substrate preference for 84 macroinvertebrate species was demonstrated using the Index of Representation.<p/>Substrate-selection experiments were conducted in a laboratory stream for three Trichoptera species (Micropterna sequax, Chaetopteryx Villosa and Sericostoma personatum) and one Ephemeroptera species (Ephemera danica). An experiment on the colonization of artificial substrates in the field was also conducted.<p/>Prom the field data, several faunal groups could be distinguished, each group made up of species with similar substrate preferences. Detailed data on the microdistribution in relation to substrate particle size are given for 26 species, which represent the various taxonomical units that compose the faunal groups: Trichoptera (5 species), Ephemeroptera (1 species), Plecoptera (1 species), Coleoptera (3 species), Amphipoda (1 species), Diptera (15 species, among which 13 species of Chironomidae). The microdistribution is discussed in relation to case-building behaviour, life cycle and food preferences. For several species substrate preferences may be different for different development stages or in different seasons.<p/>It is concluded that most species show distinct preferences for a specific substrate. The small scale spatial variation in substrate composition of the stream bed is essential for the existence of many lowland stream macroinvertebrate species. Advisors/Committee Members: M.F. Moerzer Bruyns, J.J.P. Gardeniers.

Subjects/Keywords: fauna; waterbodems; Mollusca; waterlopen; aquatische ecosystemen; articulata; gelderland; macrofauna; Aquatische ecologie; fauna; water bottoms; Mollusca; streams; aquatic ecosystems; articulata; gelderland; macrofauna; Aquatic Ecology

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APA (6^th Edition):

Tolkamp, H. H. (1980). Organism-substrate relationships in lowland streams. (Doctoral Dissertation). Landbouwhogeschool Wageningen. Retrieved from http://library.wur.nl/WebQuery/wurpubs/74813 ; urn:nbn:nl:ui:32-74813 ; urn:nbn:nl:ui:32-74813 ; http://library.wur.nl/WebQuery/wurpubs/74813

Chicago Manual of Style (16^th Edition):

Tolkamp, H H. “Organism-substrate relationships in lowland streams.” 1980. Doctoral Dissertation, Landbouwhogeschool Wageningen. Accessed January 25, 2021. http://library.wur.nl/WebQuery/wurpubs/74813 ; urn:nbn:nl:ui:32-74813 ; urn:nbn:nl:ui:32-74813 ; http://library.wur.nl/WebQuery/wurpubs/74813.

MLA Handbook (7^th Edition):

Tolkamp, H H. “Organism-substrate relationships in lowland streams.” 1980. Web. 25 Jan 2021.

Vancouver:

Tolkamp HH. Organism-substrate relationships in lowland streams. [Internet] [Doctoral dissertation]. Landbouwhogeschool Wageningen; 1980. [cited 2021 Jan 25]. Available from: http://library.wur.nl/WebQuery/wurpubs/74813 ; urn:nbn:nl:ui:32-74813 ; urn:nbn:nl:ui:32-74813 ; http://library.wur.nl/WebQuery/wurpubs/74813.

Council of Science Editors:

Tolkamp HH. Organism-substrate relationships in lowland streams. [Doctoral Dissertation]. Landbouwhogeschool Wageningen; 1980. Available from: http://library.wur.nl/WebQuery/wurpubs/74813 ; urn:nbn:nl:ui:32-74813 ; urn:nbn:nl:ui:32-74813 ; http://library.wur.nl/WebQuery/wurpubs/74813

13. Kessel, van, J.F. Influence of denitrification in aquatic sediments on the nitrogen content of natural waters.

Degree: 1976, Landbouwhogeschool Wageningen

URL: http://library.wur.nl/WebQuery/wurpubs/70310 ; urn:nbn:nl:ui:32-70310 ; urn:nbn:nl:ui:32-70310 ; http://library.wur.nl/WebQuery/wurpubs/70310

► <p/>A study was made of microbiological processes, particularly denitrification, leading to the elimination of nitrogen from natural waters. As denitrification is an anaerobic process and… (more)

Subjects/Keywords: waterbodems; anorganische verbindingen; denitrificatie; microbiologie; stikstofkringloop; stikstof; aquatisch milieu; Hydrologie; water bottoms; inorganic compounds; denitrification; microbiology; nitrogen cycle; nitrogen; aquatic environment; Hydrology

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APA (6^th Edition):

Kessel, van, J. F. (1976). Influence of denitrification in aquatic sediments on the nitrogen content of natural waters. (Doctoral Dissertation). Landbouwhogeschool Wageningen. Retrieved from http://library.wur.nl/WebQuery/wurpubs/70310 ; urn:nbn:nl:ui:32-70310 ; urn:nbn:nl:ui:32-70310 ; http://library.wur.nl/WebQuery/wurpubs/70310

Chicago Manual of Style (16^th Edition):

Kessel, van, J F. “Influence of denitrification in aquatic sediments on the nitrogen content of natural waters.” 1976. Doctoral Dissertation, Landbouwhogeschool Wageningen. Accessed January 25, 2021. http://library.wur.nl/WebQuery/wurpubs/70310 ; urn:nbn:nl:ui:32-70310 ; urn:nbn:nl:ui:32-70310 ; http://library.wur.nl/WebQuery/wurpubs/70310.

MLA Handbook (7^th Edition):

Kessel, van, J F. “Influence of denitrification in aquatic sediments on the nitrogen content of natural waters.” 1976. Web. 25 Jan 2021.

Vancouver:

Kessel, van JF. Influence of denitrification in aquatic sediments on the nitrogen content of natural waters. [Internet] [Doctoral dissertation]. Landbouwhogeschool Wageningen; 1976. [cited 2021 Jan 25]. Available from: http://library.wur.nl/WebQuery/wurpubs/70310 ; urn:nbn:nl:ui:32-70310 ; urn:nbn:nl:ui:32-70310 ; http://library.wur.nl/WebQuery/wurpubs/70310.

Council of Science Editors:

Kessel, van JF. Influence of denitrification in aquatic sediments on the nitrogen content of natural waters. [Doctoral Dissertation]. Landbouwhogeschool Wageningen; 1976. Available from: http://library.wur.nl/WebQuery/wurpubs/70310 ; urn:nbn:nl:ui:32-70310 ; urn:nbn:nl:ui:32-70310 ; http://library.wur.nl/WebQuery/wurpubs/70310

14. Luijn, van, F. Nitrogen removal by denitrification in the sediments of a shallow lake.

Degree: 1997, Agricultural University

URL: http://library.wur.nl/WebQuery/wurpubs/38845 ; urn:nbn:nl:ui:32-38845 ; urn:nbn:nl:ui:32-38845 ; http://library.wur.nl/WebQuery/wurpubs/38845

► Most surface waters in the Netherlands are highly eutrophicated due to high loadings with the nutrients nitrogen (N) and phosphorus (P). To improve the… (more)

▼ Most surface waters in the Netherlands are highly eutrophicated due to high loadings with the nutrients nitrogen (N) and phosphorus (P). To improve the water quality of lakes often the phosphorus loading is reduced. Due to phosphorus release from the sediments the success of the recovery of these lakes, however, is limited. Therefore renewed interest is directed to the fate of nitrogen in surface waters: perhaps a reduction of the N loading may result in a better water quality. This interest is furthermore achieved by the international programs for protection and restoration of the North Sea and the river Rhine. In the nitrogen cycle bacterial processes in the sediment are very important. When the external nitrogen loadings are reduced, these benthic processes (resulting in the internal loading) dominate more and more the nitrogen loading and the concentration in the overlying water. Little is known, however, about the magnitude of the various nitrogen process rates or about the effects of reduction of the nitrogen loading. The aim of this study was therefore to investigate and quantify the important microbial N processes (ammonification, nitrification and denitrification) and the related fluxes to the overlying water, in order to obtain a better insight in the possibilities to diminish eutrophication by reduction of the N loading. Special attention was paid to the denitrification as by this process nitrogen can be removed from the sediment-water system as N ₂ to the atmosphere. The experiments in this study were performed with sediments sampled from the shallow lake Wolderwijd/Nuldemauw, The Netherlands. In the literature various methods to measure denitrification rates are described. In Chapter 2 the results of three of these methods, the N ₂ flux Method, the ¹⁵N isotope pairing technique and the mass balance approach, are compared. Results obtained with the N ₂ flux method were in agreement with mass balance data, but were higher than the results obtained with the ¹⁵N isotope pairing technique. Various checks demonstrated that after a pre incubation period of about 10 days the coupled denitrification can be estimated very well with the N ₂ flux method and that the N ₂ flux is not due to leakage of atmospheric nitrogen. An important assumption for the calculation of the coupled denitrification by the 15N isotope pairing is the uniform mixing of the nitrate species ( ¹⁴NO ₃^-and ¹⁵NO ₃^-)When micro-sites exist in the sediment, uniform mixing of the nitrate species probably cannot be assumed because of the very tight coupling between nitrification and denitrification at these sites. It is therefore suggested that the difference in the results is caused by an underestimation of the coupled denitrification by the ¹⁵N isotope pairing technique, due to the occurrence of micro-sites. In the further research the N ₂ flux method was used. In order to… Advisors/Committee Members: L. Lijklema, P.C.M. Boers.

Subjects/Keywords: hydrologie; limnologie; meren; plassen; watermicrobiologie; denitrificatie; waterkwaliteit; waterbeheer; water; reservoirs; waterbodems; hydrology; limnology; lakes; ponds; water microbiology; denitrification; water quality; water management; water; reservoirs; water bottoms

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APA (6^th Edition):

Luijn, van, F. (1997). Nitrogen removal by denitrification in the sediments of a shallow lake. (Doctoral Dissertation). Agricultural University. Retrieved from http://library.wur.nl/WebQuery/wurpubs/38845 ; urn:nbn:nl:ui:32-38845 ; urn:nbn:nl:ui:32-38845 ; http://library.wur.nl/WebQuery/wurpubs/38845

Chicago Manual of Style (16^th Edition):

Luijn, van, F. “Nitrogen removal by denitrification in the sediments of a shallow lake.” 1997. Doctoral Dissertation, Agricultural University. Accessed January 25, 2021. http://library.wur.nl/WebQuery/wurpubs/38845 ; urn:nbn:nl:ui:32-38845 ; urn:nbn:nl:ui:32-38845 ; http://library.wur.nl/WebQuery/wurpubs/38845.

MLA Handbook (7^th Edition):

Luijn, van, F. “Nitrogen removal by denitrification in the sediments of a shallow lake.” 1997. Web. 25 Jan 2021.

Vancouver:

Luijn, van F. Nitrogen removal by denitrification in the sediments of a shallow lake. [Internet] [Doctoral dissertation]. Agricultural University; 1997. [cited 2021 Jan 25]. Available from: http://library.wur.nl/WebQuery/wurpubs/38845 ; urn:nbn:nl:ui:32-38845 ; urn:nbn:nl:ui:32-38845 ; http://library.wur.nl/WebQuery/wurpubs/38845.

Council of Science Editors:

Luijn, van F. Nitrogen removal by denitrification in the sediments of a shallow lake. [Doctoral Dissertation]. Agricultural University; 1997. Available from: http://library.wur.nl/WebQuery/wurpubs/38845 ; urn:nbn:nl:ui:32-38845 ; urn:nbn:nl:ui:32-38845 ; http://library.wur.nl/WebQuery/wurpubs/38845

Universidade do Minho

15. Fernandes, Sara Raquel Marques. Desenvolvimento de betumes modificados inovadores para misturas betuminosas sustentáveis.

Degree: 2018, Universidade do Minho

URL: http://hdl.handle.net/1822/55978

► The new environmental targets related to conserving the natural resources and recovering the waste materials have been the basis for several scientific studies in different… (more)

▼ The new environmental targets related to conserving the natural resources and recovering the waste materials have been the basis for several scientific studies in different research areas. Therefore, in the road paving industry field, which consumes massive amounts of natural resources, the incorporation of different waste materials in asphalt mixtures has been investigated in order to develop more sustainable solutions. As bitumen is one of the most valuable materials used in pavements, the study of new binders that incorporate a lower amount of new bitumen is essential, both by reusing aged bitumen (recycling) and by adding some waste materials, due to the associated economic and environmental advantages. Thus, the main aim of this study is the development of innovative modified bitumens that maximize the use of waste materials, especially waste engine oil and recycled engine oil bottoms (partial replacements for bitumen), to produce more sustainable conventional and recycled asphalt mixtures. With this work, new solutions for road paving materials, combining adequate performance and economic viability with environmental advantages that result from the use of industrial waste and reclaimed asphalt materials in asphalt mixtures, shall be developed. Ultimately, this work should assure that these solutions with high incorporation of waste materials do not present risks related to their use, either from their leachates or from their carbon dioxide emissions. For the accomplishment of this work, thermal, chemical and physical characterisation of the materials used in the modified bitumens with waste materials and in the asphalt mixtures was carried out. Additionally, different bitumen modification procedures were evaluated through fluorescence microscopy tests to verify the polymer dispersion in the blend of bitumen and waste engine oil. Thus, it was possible to minimize the digestion time and/or temperature and to obtain a more effective polymer dispersion in the blend of bitumen and waste engine oil. Afterwards, several modified bitumens with different amounts of waste materials (waste engine oil/recycled engine oil bottoms and polymers) were evaluated through basic and rheological characterization, and those with the most promising properties were selected. The selected bitumens were further characterised regarding their thermal, chemical and aging resistance behaviour. Then, conventional and recycled Stone Mastic Asphalt (SMA) mixtures produced with those innovative bitumens modified with waste materials were evaluated regarding their mechanical and surface performance. Finally, the sustainability of these solutions was analysed in relation to their leachates production, carbon dioxide emissions and economic viability. The results from this study confirm that the innovative bitumens modified with waste materials developed in this work are able to produce more sustainable conventional and recycled asphalt mixtures, which combine a good mechanical performance with economic and… Advisors/Committee Members: Silva, Hugo M. R. D. (advisor), Oliveira, Joel R. M. (advisor).

Subjects/Keywords: Betumes modificados; Óleo de motor usado; Fundo de coluna de destilação; Resíduos poliméricos; Caracterização avançada de betumes; Misturas Stone Mastic Asphalt; Misturas recicladas; Desempenho mecânico; Análise económica e ambiental; Modified bitumens; Waste engine oil; Recycled engine oil bottoms; Waste polymers; Advanced characterization of bitumens; Stone Mastic Asphalt mixtures; Recycled mixtures; Mechanical performance; Economic and environmental analysis; Engenharia e Tecnologia::Engenharia Civil

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APA (6^th Edition):

Fernandes, S. R. M. (2018). Desenvolvimento de betumes modificados inovadores para misturas betuminosas sustentáveis. (Doctoral Dissertation). Universidade do Minho. Retrieved from http://hdl.handle.net/1822/55978

Chicago Manual of Style (16^th Edition):

Fernandes, Sara Raquel Marques. “Desenvolvimento de betumes modificados inovadores para misturas betuminosas sustentáveis.” 2018. Doctoral Dissertation, Universidade do Minho. Accessed January 25, 2021. http://hdl.handle.net/1822/55978.

MLA Handbook (7^th Edition):

Fernandes, Sara Raquel Marques. “Desenvolvimento de betumes modificados inovadores para misturas betuminosas sustentáveis.” 2018. Web. 25 Jan 2021.

Vancouver:

Fernandes SRM. Desenvolvimento de betumes modificados inovadores para misturas betuminosas sustentáveis. [Internet] [Doctoral dissertation]. Universidade do Minho; 2018. [cited 2021 Jan 25]. Available from: http://hdl.handle.net/1822/55978.

Council of Science Editors:

Fernandes SRM. Desenvolvimento de betumes modificados inovadores para misturas betuminosas sustentáveis. [Doctoral Dissertation]. Universidade do Minho; 2018. Available from: http://hdl.handle.net/1822/55978

16. Kupryianchyk, D. Activated carbon in sediment remediation : benefits, risks and perspectives.

Degree: 2013, NARCIS

URL: http://library.wur.nl/WebQuery/wurpubs/435793 ; urn:nbn:nl:ui:32-435793 ; urn:nbn:nl:ui:32-435793 ; http://library.wur.nl/WebQuery/wurpubs/435793

► Klassieke verontreinigingen zoals hydrofobe organische verbindingen (HOCs) komen uiteindelijk vaak in waterbodems terecht. Deze waterbodems kunnen hierdoor zelf een bron van verontreiniging worden en zo… (more)

Subjects/Keywords: waterbodems; verontreinigde sedimenten; ecotoxicologie; remediatie; actieve kool; macroinvertebraten; benthos; waterorganismen; bioaccumulatie; Milieutechnologie; Milieutoxicologie, ecotoxicologie; Milieuverontreiniging; water bottoms; contaminated sediments; ecotoxicology; remediation; activated carbon; macroinvertebrates; benthos; aquatic organisms; bioaccumulation; Environmental Engineering; Environmental Toxicology, Ecotoxicology; Environmental Pollution

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kupryianchyk, D. (2013). Activated carbon in sediment remediation : benefits, risks and perspectives. (Doctoral Dissertation). NARCIS. Retrieved from http://library.wur.nl/WebQuery/wurpubs/435793 ; urn:nbn:nl:ui:32-435793 ; urn:nbn:nl:ui:32-435793 ; http://library.wur.nl/WebQuery/wurpubs/435793

Chicago Manual of Style (16^th Edition):

Kupryianchyk, D. “Activated carbon in sediment remediation : benefits, risks and perspectives.” 2013. Doctoral Dissertation, NARCIS. Accessed January 25, 2021. http://library.wur.nl/WebQuery/wurpubs/435793 ; urn:nbn:nl:ui:32-435793 ; urn:nbn:nl:ui:32-435793 ; http://library.wur.nl/WebQuery/wurpubs/435793.

MLA Handbook (7^th Edition):

Kupryianchyk, D. “Activated carbon in sediment remediation : benefits, risks and perspectives.” 2013. Web. 25 Jan 2021.

Vancouver:

Kupryianchyk D. Activated carbon in sediment remediation : benefits, risks and perspectives. [Internet] [Doctoral dissertation]. NARCIS; 2013. [cited 2021 Jan 25]. Available from: http://library.wur.nl/WebQuery/wurpubs/435793 ; urn:nbn:nl:ui:32-435793 ; urn:nbn:nl:ui:32-435793 ; http://library.wur.nl/WebQuery/wurpubs/435793.

Council of Science Editors:

Kupryianchyk D. Activated carbon in sediment remediation : benefits, risks and perspectives. [Doctoral Dissertation]. NARCIS; 2013. Available from: http://library.wur.nl/WebQuery/wurpubs/435793 ; urn:nbn:nl:ui:32-435793 ; urn:nbn:nl:ui:32-435793 ; http://library.wur.nl/WebQuery/wurpubs/435793

17. Boschker, H.T.S. Decomposition of organic matter in the littoral sediments of a lake.

Degree: 1997, Agricultural University

URL: http://library.wur.nl/WebQuery/wurpubs/40013 ; urn:nbn:nl:ui:32-40013 ; urn:nbn:nl:ui:32-40013 ; http://library.wur.nl/WebQuery/wurpubs/40013

► This thesis deals with the microbial decomposition of organic matter in littoral sediments of lakes. Special attention was given to the initial step in… (more)

▼ This thesis deals with the microbial decomposition of organic matter in littoral sediments of lakes. Special attention was given to the initial step in the decomposition of polysaccharides that form a major component of macrophyte litter produced in these systems. This initial step, an extracellular enzymatic hydrolysis, is generally regarded as the rate limiting step in the decomposition of biopolymers in natural systems. The study site selected was an almost monospecific stand of common reed, Phragmites australis, that covers the upper littoral zone of Lake Gooimeer, The Netherlands. The first two experimental chapters of this thesis deal with several general aspects of sedimentary carbon cycling, which are necessary for an implementation of a detailed study on the initial decomposition of biopolymers. In Lake Gooimeer, we could show that deep inside the reed bed, organic matter cycling was dominated by one source, namely macrophyte litter (Chapter 2). Plant litter is mainly made of lignocellulose, which has a rather simple and distinct polymeric composition. This makes the reed bed a good test system to study initial decomposition of biopolymers under natural conditions. Carbon sources gradually changed to an algal dominance going from inside the bed towards the lake (Chapter 2). This transition already begins inside the reed bed and no macrophyte derived material was found outside the bed, despite the high annual production of common reed. Results of the budget study (Chapter 3) suggest that there are two major processes involved in the removal of sedimentary organic matter. Transport caused by erosion of the sediment during storms explains about 60% of the total carbon and only 30% was removed by mineralization. Mineralization rates were mainly determined by temperature, changes in oxic and anoxic conditions, and by amounts of organic matter present. Less than 5% of the annual production remained in the sediment over a period of 25 years. No short term accumulation could be detected during both years studied and results from 1992 even suggested a net removal of organic matter. This shows that sediment organic matter accumulation is variable and is governed by a delicate balance between input and outputs. Predicting sediment organic matter dynamics will be difficult in these type of ecosystems, since it depends to a large extent on episodic and variable sediment erosion during storms. The remainder of the thesis deals with the initial decomposition of the two main reedlitter polysaccharides cellulose and arabino-xylan in sediments and the enzymes involved in this process. A method was developed to measure extracellular enzyme activities involved in cellulose decomposition by using artificial, fluorochrome labelled substrates (Chapter 4). Inhibition experiments with known substrates and inhibitors of cellulolytic enzymes were used to characterise the enzyme activities as measure in the assays. Results of the inhibition experiment suggested that the measured activity was of bacterial origin in the sediment… Advisors/Committee Members: A.J.B. Zehnder, T.E. Cappenberg.

Subjects/Keywords: organische stof; bodemchemie; microbiële afbraak; koolstof; meren; nederland; gesteenten; sedimentmaterialen; waterbodems; Geohydrologie, bodemhydrologie; organic matter; soil chemistry; microbial degradation; carbon; lakes; netherlands; rocks; sedimentary materials; water bottoms; Geohydrology, Soil Hydrology

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APA (6^th Edition):

Boschker, H. T. S. (1997). Decomposition of organic matter in the littoral sediments of a lake. (Doctoral Dissertation). Agricultural University. Retrieved from http://library.wur.nl/WebQuery/wurpubs/40013 ; urn:nbn:nl:ui:32-40013 ; urn:nbn:nl:ui:32-40013 ; http://library.wur.nl/WebQuery/wurpubs/40013

Chicago Manual of Style (16^th Edition):

Boschker, H T S. “Decomposition of organic matter in the littoral sediments of a lake.” 1997. Doctoral Dissertation, Agricultural University. Accessed January 25, 2021. http://library.wur.nl/WebQuery/wurpubs/40013 ; urn:nbn:nl:ui:32-40013 ; urn:nbn:nl:ui:32-40013 ; http://library.wur.nl/WebQuery/wurpubs/40013.

MLA Handbook (7^th Edition):

Boschker, H T S. “Decomposition of organic matter in the littoral sediments of a lake.” 1997. Web. 25 Jan 2021.

Vancouver:

Boschker HTS. Decomposition of organic matter in the littoral sediments of a lake. [Internet] [Doctoral dissertation]. Agricultural University; 1997. [cited 2021 Jan 25]. Available from: http://library.wur.nl/WebQuery/wurpubs/40013 ; urn:nbn:nl:ui:32-40013 ; urn:nbn:nl:ui:32-40013 ; http://library.wur.nl/WebQuery/wurpubs/40013.

Council of Science Editors:

Boschker HTS. Decomposition of organic matter in the littoral sediments of a lake. [Doctoral Dissertation]. Agricultural University; 1997. Available from: http://library.wur.nl/WebQuery/wurpubs/40013 ; urn:nbn:nl:ui:32-40013 ; urn:nbn:nl:ui:32-40013 ; http://library.wur.nl/WebQuery/wurpubs/40013

18. Boers, P.C.M. The release of dissolved phosphorus from lake sediments.

Degree: 1991, Agricultural University

URL: http://library.wur.nl/WebQuery/wurpubs/15018 ; urn:nbn:nl:ui:32-15018 ; urn:nbn:nl:ui:32-15018 ; http://library.wur.nl/WebQuery/wurpubs/15018

► Chapter 1. Introduction: Eutrophication is one of the world's major water quality problems. Attempts to alleviate eutrophication of lakes have involved the control of… (more)

▼ Chapter 1. Introduction: Eutrophication is one of the world's major water quality problems. Attempts to alleviate eutrophication of lakes have involved the control of phosphorus loadings. In such cases, an internal loading of phosphorus from the sediments may retard an improvement of the water quality. Chapters 2 - 5 deal specifically with the sediments of Lake Loosdrecht. Chapter 2. Distribution and forms of phosphorus in the sediments of the Loosdrecht Lakes (the Netherlands): The phosphorus loading entering the Dutch Lake Loosdrecht was reduced in 1984. A survey of the sediments of this lake indicated that an enrichment of these sediments with phosphorus was limited to the area near the former inlet of polluted water from the River Vecht. In most other areas the phosphorus accumulation in the upper 18 cm. was 10 - 15 g P m ^-2, equal to the external P loading of approximately one decade. This is probably due to the transport of phosphorus from the surficial sediments with the percolating. seepage water. A rough estimation indicates that the amount of phosphorus carried away with this seepage compensates for the external loading. Results of selective extractions, desorption experiments and bio-assays all indicate that 5 % or less of the phosphorus in the upper sediment layers is "available" for algal growth. Chapter 3. Unmasking the particulate organic matter in a lake ecosystem: origin and fate of POM in the shallow eutrophic Loosdrecht Lakes: The sediments of Lake Loosdrecht consist for over 50 % of organic matter. Pyrolysis mass spectroscopical analysis indicated that over 95% of this organic matter is old macrophyte debris, probably originating from the peat deposits in the lake area. In winter, this material also contributes significantly to the seston in the water column. In summer the seston consists almost entirely of algal material. However, only traces of this latter material could be detected even in the upper mm, of the sediments, suggesting that the influx of algal matter in the sediments is small or that a fast degradation of the material reaching the sediments takes place. Chapter 4. Phosphorus release from the peaty sediments of the Loosdrecht Lakes (the Netherlands): The release of phosphorus from the sediments of Lake Loosdrecht was studied in some detail using continuous flow reactors. The highest release rates, up to about 4 mg P m ^-2d ^-1, were found in summer and the lowest, less than 0.5 mg P m ^-2d ^-1, were measured in winter. Temperature and downward seepage are the two most important factors controlling release rates. pH of the water column, which many other researchers found to be an important controlling factor, did not play any role in Lake Loosdrecht. The influence of temperature and seepage were more pronounced in summer than in winter. The magnitude of the release rate and the influence of temperature and seepage could be largely,… Advisors/Committee Members: L. Lijklema.

Subjects/Keywords: meren; reservoirs; plassen; waterverontreiniging; waterkwaliteit; eutrofiëring; fosfaten; fosforpentoxide; derivaten; stilstaand water; nederland; biologisch waterbeheer; utrecht; waterbodems; lakes; reservoirs; ponds; water pollution; water quality; eutrophication; phosphates; phosphorus pentoxide; derivatives; standing water; netherlands; biological water management; utrecht; water bottoms

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APA (6^th Edition):

Boers, P. C. M. (1991). The release of dissolved phosphorus from lake sediments. (Doctoral Dissertation). Agricultural University. Retrieved from http://library.wur.nl/WebQuery/wurpubs/15018 ; urn:nbn:nl:ui:32-15018 ; urn:nbn:nl:ui:32-15018 ; http://library.wur.nl/WebQuery/wurpubs/15018

Chicago Manual of Style (16^th Edition):

Boers, P C M. “The release of dissolved phosphorus from lake sediments.” 1991. Doctoral Dissertation, Agricultural University. Accessed January 25, 2021. http://library.wur.nl/WebQuery/wurpubs/15018 ; urn:nbn:nl:ui:32-15018 ; urn:nbn:nl:ui:32-15018 ; http://library.wur.nl/WebQuery/wurpubs/15018.

MLA Handbook (7^th Edition):

Boers, P C M. “The release of dissolved phosphorus from lake sediments.” 1991. Web. 25 Jan 2021.

Vancouver:

Boers PCM. The release of dissolved phosphorus from lake sediments. [Internet] [Doctoral dissertation]. Agricultural University; 1991. [cited 2021 Jan 25]. Available from: http://library.wur.nl/WebQuery/wurpubs/15018 ; urn:nbn:nl:ui:32-15018 ; urn:nbn:nl:ui:32-15018 ; http://library.wur.nl/WebQuery/wurpubs/15018.

Council of Science Editors:

Boers PCM. The release of dissolved phosphorus from lake sediments. [Doctoral Dissertation]. Agricultural University; 1991. Available from: http://library.wur.nl/WebQuery/wurpubs/15018 ; urn:nbn:nl:ui:32-15018 ; urn:nbn:nl:ui:32-15018 ; http://library.wur.nl/WebQuery/wurpubs/15018

19. Beurskens, J.E.M. Microbial transformation of chlorinated aromatics in sediments.

Degree: 1995, Agricultural University

URL: http://library.wur.nl/WebQuery/wurpubs/29763 ; urn:nbn:nl:ui:32-29763 ; urn:nbn:nl:ui:32-29763 ; http://library.wur.nl/WebQuery/wurpubs/29763

► Numerous contaminants like heavy metals, polycyclic aromatic hydrocarbons (PAHs), chlorinated benzenes (CBs), polychlorinated biphenyls (PCBs), polychlorinated dibenzo- p -dioxins (PCDDs) and polychlorinated furans (PCDFs)… (more)

▼ Numerous contaminants like heavy metals, polycyclic aromatic hydrocarbons (PAHs), chlorinated benzenes (CBs), polychlorinated biphenyls (PCBs), polychlorinated dibenzo- p -dioxins (PCDDs) and polychlorinated furans (PCDFs) are detected in the major rivers in the Netherlands. These contaminants have relatively low aqueous solubilities and bind substantially to the suspended solids in river water. Due to decreasing stream velocities in the downstream stretches of a river suspended solids will settle to the river bed. Thus, the deposition of suspended solids in the downstream stretches results in transport of contaminants from the water column to the sediments. In the past decade widespread contamination of sediments with heavy metals, PAHs, and chlorinated aromatics (CBs, PCBs, PCDDs and PCDFs) has been identified in the Netherlands. The extent and seriousness of sediment contamination is most pronounced in the sedimentation areas of the rivers Rhine, Meuse and Scheldt. The total amount of heavily contaminated sediments in these areas is estimated at more than 100 million m ³. The reduced fertility of cormorants in the Biesbosch, a sedimentation area of the Meuse, can be put forward as an example of the adverse ecological impact of contaminated sediments. Microorganisms (bacteria and fungi) play an important role in the decomposition of organic matter in sediments. The diversity of metabolic processes in microorganisms enables them to degrade a variety of organic contaminants as well. Two degradation processes can be distinguished: transformation and mineralization. Transformation is the process by which the chemical structure of the organic substrate (or contaminant) is altered and organic products are formed. Mineralization is the process whereby, besides biomass, only inorganic products (CO ₂ , CH ₄ , H ₂ O, chemical elements) are formed during microbial metabolism. In the presence of oxygen, as in the water column of rivers, the microbial degradation of chlorinated aromatic compounds decreases with an increasing number of chlorine atoms in the molecule. The relative persistence of higher chlorinated aromatics in the water column, combined with the hydrophobic properties of the aromatics, results in deposition of these contaminants in sediments. The upper few centimeters of sediment contain oxygen; most of the sediment is anoxic. Higher chlorinated compounds can, particularly under these anoxic conditions, be transformed by anaerobic microorganisms into lower chlorinated compounds. In the last 5 to 10 years microbial dechlorination reactions, i.e. the replacement of chlorines in the contaminant molecule with hydrogen atoms, have been demonstrated in laboratory tests for a variety of chlorinated aromatics. Some of these tests, conducted with anaerobic sediment, suggest that dechlorination reactions may occur in contaminated sediments. Determining the occurrence of… Advisors/Committee Members: A.J.B. Zehnder, J. de Jong.

Subjects/Keywords: volksgezondheidsbevordering; decontaminatie; schoonmaken; microbiële afbraak; polycyclische koolwaterstoffen; aromatische koolwaterstoffen; waterbodems; Microbiologie (algemeen); Bodemverontreiniging; sanitation; decontamination; cleaning; microbial degradation; polycyclic hydrocarbons; aromatic hydrocarbons; water bottoms; Microbiology (General); Soil Pollution

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APA (6^th Edition):

Beurskens, J. E. M. (1995). Microbial transformation of chlorinated aromatics in sediments. (Doctoral Dissertation). Agricultural University. Retrieved from http://library.wur.nl/WebQuery/wurpubs/29763 ; urn:nbn:nl:ui:32-29763 ; urn:nbn:nl:ui:32-29763 ; http://library.wur.nl/WebQuery/wurpubs/29763

Chicago Manual of Style (16^th Edition):

Beurskens, J E M. “Microbial transformation of chlorinated aromatics in sediments.” 1995. Doctoral Dissertation, Agricultural University. Accessed January 25, 2021. http://library.wur.nl/WebQuery/wurpubs/29763 ; urn:nbn:nl:ui:32-29763 ; urn:nbn:nl:ui:32-29763 ; http://library.wur.nl/WebQuery/wurpubs/29763.

MLA Handbook (7^th Edition):

Beurskens, J E M. “Microbial transformation of chlorinated aromatics in sediments.” 1995. Web. 25 Jan 2021.

Vancouver:

Beurskens JEM. Microbial transformation of chlorinated aromatics in sediments. [Internet] [Doctoral dissertation]. Agricultural University; 1995. [cited 2021 Jan 25]. Available from: http://library.wur.nl/WebQuery/wurpubs/29763 ; urn:nbn:nl:ui:32-29763 ; urn:nbn:nl:ui:32-29763 ; http://library.wur.nl/WebQuery/wurpubs/29763.

Council of Science Editors:

Beurskens JEM. Microbial transformation of chlorinated aromatics in sediments. [Doctoral Dissertation]. Agricultural University; 1995. Available from: http://library.wur.nl/WebQuery/wurpubs/29763 ; urn:nbn:nl:ui:32-29763 ; urn:nbn:nl:ui:32-29763 ; http://library.wur.nl/WebQuery/wurpubs/29763

20. Holcombe, Evan W. Multi-Scale Approach to Design Sustainable Asphalt Paving Materials.

Degree: MS, Civil Engineering (Engineering and Technology), 2017, Ohio University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1493805362392927

► The continuous use of recycled material in asphalt pavement mixtures, specifically Reclaimed Asphalt Pavement (RAP), Recycled Asphalt Shingles (RAS) and Re-Refined Engine Oil Bottoms (REOB),… (more)

▼ The continuous use of recycled material in asphalt pavement mixtures, specifically Reclaimed Asphalt Pavement (RAP), Recycled Asphalt Shingles (RAS) and Re-Refined Engine Oil Bottoms (REOB), have developed an increasing need to further evaluate the performance of these mixtures at the micro and macro-levels, as the use of such materials reduces cost of virgin materials and energy consumption. Although asphalt binder, including recycled or additive materials, may meet a desired performance grade (PG) using macro-scale tests, they may lack critical nano-mechanical properties that largely affect long-term performance, such as adhesion and diffusive efficiency between virgin and recycled binders. These commonly overlooked properties can correlate with performance behaviors such as fatigue and low temperature cracking during field performance. This study was conducted in two major parts. Part one was performed with the intent to evaluate the nano-mechanical and blending-diffusive efficiency of toluene and trichloroethylene extracted RAP and RAS binder using tapping mode imagery and force spectroscopy using Atomic Force Microscopy (AFM). Furthermore, this study was set to correlate the findings from micro-testing to macro-scale laboratory performance tests including Semi-Circular Bending (SCB) to evaluate fatigue cracking resistance at intermediate temperatures, Asphalt Concrete Cracking Device (ACCD) to evaluate low temperature cracking and AASHTO 283 ITS to study moisture damage susceptibility of intermediate course mixtures with high RAP and RAS contents. Results showed that tear-off RAS material have a significant effect on fatigue and low temperature cracking performance, primarily at long-term aged conditions. Neither tear-off nor manufactured waste RAS binder blend well with virgin binder, whereas RAP shows a zone of blending. AFM imaging indicated all extracted RAS binder had a much rougher surface texture than RAP or virgin binders and did not contain any “bee” structures. The procedure of splitting RAP material for sampling during the volumetric mix design process has a significant effect on the optimal virgin binder content design, which in turn has a large effect on performance properties.Part two of this thesis summarizes the results of laboratory tests that were conducted to evaluate the microstructure, adhesion and other mechanical properties of asphalt binders meeting the same Performance Grade (PG) but produced using different processes and modifiers. Atomic Force Microscope (AFM) tapping mode imaging and force spectroscopy experiments were conducted on different straight run and modified asphalt binders meeting the same performance grade. In addition, Bitumen Bond Strength (BBS) and Semi-Circular Beam (SCB) tests were conducted on the different binders evaluated and mixes prepared using those binders, respectively, for comparison. The AFM images indicated that the microstructure of the modified binders was different than those of the straight run binders. The AFM force spectroscopy test results showed… Advisors/Committee Members: Nazzal, Munir (Advisor).

Subjects/Keywords: Civil Engineering; Materials Science; reclaimed asphalt pavement; recycled asphalt shingles; re-refined engine oil bottoms; atomic force microscopy; fatigue cracking; adhesion; diffusion, moisture damage; thermal cracking

…x28;RAS) and Rerefined Engine Oil Bottoms (REOB) have been incorporated into… …cracking. 1.1.2 Re-Refined Engine Oil Bottoms (REOB) Recovered Engine Oil Bottoms (… …each year (Mooney 2015). REOB is also referred as Re-refined Vacuum Tower Bottoms… …Engine Oil Residues (EOR), Waste Oil Distillation Bottoms (WODB), Re… …Bottoms (RHVDB), asphalt flux, asphalt extenders, asphalt blowdowns, Vacuum Tower…

14 more images…

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APA (6^th Edition):

Holcombe, E. W. (2017). Multi-Scale Approach to Design Sustainable Asphalt Paving Materials. (Masters Thesis). Ohio University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1493805362392927

Chicago Manual of Style (16^th Edition):

Holcombe, Evan W. “Multi-Scale Approach to Design Sustainable Asphalt Paving Materials.” 2017. Masters Thesis, Ohio University. Accessed January 25, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1493805362392927.

MLA Handbook (7^th Edition):

Holcombe, Evan W. “Multi-Scale Approach to Design Sustainable Asphalt Paving Materials.” 2017. Web. 25 Jan 2021.

Vancouver:

Holcombe EW. Multi-Scale Approach to Design Sustainable Asphalt Paving Materials. [Internet] [Masters thesis]. Ohio University; 2017. [cited 2021 Jan 25]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1493805362392927.

Council of Science Editors:

Holcombe EW. Multi-Scale Approach to Design Sustainable Asphalt Paving Materials. [Masters Thesis]. Ohio University; 2017. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1493805362392927

21. Scholten, J.C.M. The influence of sulfate and nitrate on the methane formation by methanogenic archaea in freshwater sediments.

Degree: 1999, Agricultural University

URL: http://library.wur.nl/WebQuery/wurpubs/63010 ; urn:nbn:nl:ui:32-63010 ; urn:nbn:nl:ui:32-63010 ; http://library.wur.nl/WebQuery/wurpubs/63010

► In this thesis the effect of inorganic electron acceptors (sulfate and nitrate) on methane emission from freshwater sediments in the Netherlands was investigated. The… (more)

▼ In this thesis the effect of inorganic electron acceptors (sulfate and nitrate) on methane emission from freshwater sediments in the Netherlands was investigated. The chosen study area was a polder located between Leiden and Utrecht, and is representative for similar polders in The Netherlands (Chapter 3). The polder contains peat grasslands in which ditches are lying used for maintaining stable water levels. The ditches contain sediment which is a potential source of CH ₄ . In freshwater environments, sulfate can be introduced by infiltration water, supply water or due to the oxidation of S-rich organic matter and iron sulfide. Also high nitrate concentrations can occur in the groundwater as a result of intensive agricultural activities. Therefore, in The Netherlands, sulfate and nitrate concentrations in the water may control the methane emission from methanogenic environments. <H3>The influence of sulfate and nitrate on methanogenesis</H3> Methane is produced by methanogenic archaea (methanogenesis) living in syntrophic association with fermentative and acetogenic bacteria. In presence of sulfate and nitrate, sulfate- and nitrate-reducing populations may successfully compete with these methanogenic consortia. In Chapter 4 the sediment was investigated for its potential methanogenic and syntrophic activity and the influence of sulfate and nitrate on these potential activities. Addition of acetate stimulated both methane formation and sulfate reduction, indicating that an active acetate-utilizing population of methanogens and sulfate reducers was present in the sediment. When inorganic electron acceptors were absent, substrates like propionate and butyrate were converted by syntrophic methanogenic consortia. However, addition of sulfate or nitrate resulted in the complete inhibition of these consortia. Our results showed that propionate and butyrate were directly used by the sulfate and nitrate reducers. This indicated that the syntrophic methanogenic consortia could not compete with nitrate and sulfate reducers. <H3>Acetate, a key intermediate in the anaerobic degradation of organic matter</H3> In Chapter 5 the importance of methanogenesis and sulfate reduction in a freshwater sediment was investigated by using (non) specific inhibitors. Only the combined inhibition of methanogenesis and sulfate reduction resulted in the accumulation of intermediates (acetate, propionate and valerate). Acetate was the most important compound in the accumulation (93 mole %) and thereby confirming its role as a key intermediate in the terminal step of organic matter mineralization. Furthermore, the inhibition studies showed that about 70-80% of the total carbon flow to CH ₄ was through acetate. This clearly demonstrated that acetate was quantitatively the most important substrate for methanogens in the sediment. Addition of chloroform (CHCl ₃ ) inhibited methanogens and acetate-utilizing sulfate reducers in the sediment. Pure culture studies showed that CHCl ₃… Advisors/Committee Members: W.M. de Vos, A.J.M. Stams.

Subjects/Keywords: sediment; sulfaat; nitraten; methaan; nitraatreductie; methaanproductie; opwarming van de aarde; zoet water; bacteriën; aquatisch milieu; anaërobe omstandigheden; nederland; waterbodems; Microbiologie (algemeen); Hydrologie; sediment; sulfate; nitrates; methane; nitrate reduction; methane production; global warming; fresh water; bacteria; aquatic environment; anaerobic conditions; netherlands; water bottoms; Microbiology (General); Hydrology

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Scholten, J. C. M. (1999). The influence of sulfate and nitrate on the methane formation by methanogenic archaea in freshwater sediments. (Doctoral Dissertation). Agricultural University. Retrieved from http://library.wur.nl/WebQuery/wurpubs/63010 ; urn:nbn:nl:ui:32-63010 ; urn:nbn:nl:ui:32-63010 ; http://library.wur.nl/WebQuery/wurpubs/63010

Chicago Manual of Style (16^th Edition):

Scholten, J C M. “The influence of sulfate and nitrate on the methane formation by methanogenic archaea in freshwater sediments.” 1999. Doctoral Dissertation, Agricultural University. Accessed January 25, 2021. http://library.wur.nl/WebQuery/wurpubs/63010 ; urn:nbn:nl:ui:32-63010 ; urn:nbn:nl:ui:32-63010 ; http://library.wur.nl/WebQuery/wurpubs/63010.

MLA Handbook (7^th Edition):

Scholten, J C M. “The influence of sulfate and nitrate on the methane formation by methanogenic archaea in freshwater sediments.” 1999. Web. 25 Jan 2021.

Vancouver:

Scholten JCM. The influence of sulfate and nitrate on the methane formation by methanogenic archaea in freshwater sediments. [Internet] [Doctoral dissertation]. Agricultural University; 1999. [cited 2021 Jan 25]. Available from: http://library.wur.nl/WebQuery/wurpubs/63010 ; urn:nbn:nl:ui:32-63010 ; urn:nbn:nl:ui:32-63010 ; http://library.wur.nl/WebQuery/wurpubs/63010.

Council of Science Editors:

Scholten JCM. The influence of sulfate and nitrate on the methane formation by methanogenic archaea in freshwater sediments. [Doctoral Dissertation]. Agricultural University; 1999. Available from: http://library.wur.nl/WebQuery/wurpubs/63010 ; urn:nbn:nl:ui:32-63010 ; urn:nbn:nl:ui:32-63010 ; http://library.wur.nl/WebQuery/wurpubs/63010

22. Winkels, H.J. Contaminant variability in a sedimentation area of the river Rhine = Variabiliteit van verontreinigingen in een sedimentatiegebied van de Rijn.

Degree: 1997, Agricultural University

URL: http://library.wur.nl/WebQuery/wurpubs/38848 ; urn:nbn:nl:ui:32-38848 ; urn:nbn:nl:ui:32-38848 ; http://library.wur.nl/WebQuery/wurpubs/38848

► Aquatic sediments in sedimentation zones of major rivers are in general sinks for pollutants. The sedimentation zone Ketelmeer/IJsselmeer is an important sink for contaminants… (more)

▼ Aquatic sediments in sedimentation zones of major rivers are in general sinks for pollutants. The sedimentation zone Ketelmeer/IJsselmeer is an important sink for contaminants of the river Rhine (i.e. river IJssel). Recent and historical pollution interact here. Redistribution of suspended solids and erosion of deposited sediment in the shallow Dutch lakes (due to wave action) are likely to change contamination levels of sediments in these lakes, which is the subject of this thesis. The aim of this research was to study and explain the variability of contaminants in the sedimentation area Ketelmeer/IJsselmeer in order to predict the fate of the contaminants in the future. For this purpose a number of methodologies and models were developed and/or adapted. Chapter 2 describes the collection and analysis of sediment cores, top-layer sediments and geologically different layers in Lake Ketelmeer. Sediment cores were sectioned into thin slices and the year of deposition of each layer was determined using radio-chemical analyses. The contaminant concentrations were plotted versus the year of deposition of each sediment layer to (re-)construct the history of contamination. Similar vertical changes in contaminant concentrations were found as in a number of sediment cores sampled in sandpits in Lake Ketelmeer. Further, differences in concentration between the top-layer sediments and the degree of contamination in the entire recent IJsselmeer deposits (IJm-deposits) of Lake Ketelmeer were found. The older Zuiderzee deposits (Zu-deposits) underlying the IJm-deposits have low background values for heavy metals, PAHs and PCBs. This indicates that downward transport of these contaminants with infiltrating water is negligible in this lake. The concentrations of metals and PAHs in the sediment cores reflect, without any serious alterations, the historical input of the past five decades. The pollution history is characterized by, in the early 1940s, low concentrations of metals and already elevated levels of PAHs; a possible reduction of these contaminants during the Second World War and attaining, their highest levels between 1955 and 1970. Rather low levels occur in recently deposited sediments, some of which are the lowest ever observed over the last five decades (Pb, As, and all studied PAHs). Almost all chlorinated compounds showed a certain decline in concentration in anaerobic sediments as compared to samples of the top-layer collected in 1972 and stored in the laboratory, which still reflect the original pollution input. For several PCBs this decline proved to be significant; it may have been caused by microbial dechlorination reactions in the anaerobic sediment. Consequently, the concentration profiles of the chlorinated compounds do not reflect the original pollution history directly. Despite the attenuation of concentration, peaks in PCB concentration profiles were still observed. The following trends in concentrations of PCBs can be currently observed in Lake Ketelmeer sediment: - Almost all PCBs studied… Advisors/Committee Members: S.B. Kroonenberg, L. Lijklema.

Subjects/Keywords: rivieren; waterlopen; kanalen; geologische sedimentatie; oppervlaktewater; waterverontreiniging; waterkwaliteit; stroomgebieden; drainage; milieueffect; schade; polycyclische koolwaterstoffen; aromatische koolwaterstoffen; binnenwateren; rijn; waterbodems; Milieutoxicologie, ecotoxicologie; rivers; streams; canals; geological sedimentation; surface water; water pollution; water quality; watersheds; drainage; environmental impact; damage; polycyclic hydrocarbons; aromatic hydrocarbons; inland waters; river rhine; water bottoms; Environmental Toxicology, Ecotoxicology

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APA (6^th Edition):

Winkels, H. J. (1997). Contaminant variability in a sedimentation area of the river Rhine = Variabiliteit van verontreinigingen in een sedimentatiegebied van de Rijn. (Doctoral Dissertation). Agricultural University. Retrieved from http://library.wur.nl/WebQuery/wurpubs/38848 ; urn:nbn:nl:ui:32-38848 ; urn:nbn:nl:ui:32-38848 ; http://library.wur.nl/WebQuery/wurpubs/38848

Chicago Manual of Style (16^th Edition):

Winkels, H J. “Contaminant variability in a sedimentation area of the river Rhine = Variabiliteit van verontreinigingen in een sedimentatiegebied van de Rijn.” 1997. Doctoral Dissertation, Agricultural University. Accessed January 25, 2021. http://library.wur.nl/WebQuery/wurpubs/38848 ; urn:nbn:nl:ui:32-38848 ; urn:nbn:nl:ui:32-38848 ; http://library.wur.nl/WebQuery/wurpubs/38848.

MLA Handbook (7^th Edition):

Winkels, H J. “Contaminant variability in a sedimentation area of the river Rhine = Variabiliteit van verontreinigingen in een sedimentatiegebied van de Rijn.” 1997. Web. 25 Jan 2021.

Vancouver:

Winkels HJ. Contaminant variability in a sedimentation area of the river Rhine = Variabiliteit van verontreinigingen in een sedimentatiegebied van de Rijn. [Internet] [Doctoral dissertation]. Agricultural University; 1997. [cited 2021 Jan 25]. Available from: http://library.wur.nl/WebQuery/wurpubs/38848 ; urn:nbn:nl:ui:32-38848 ; urn:nbn:nl:ui:32-38848 ; http://library.wur.nl/WebQuery/wurpubs/38848.

Council of Science Editors:

Winkels HJ. Contaminant variability in a sedimentation area of the river Rhine = Variabiliteit van verontreinigingen in een sedimentatiegebied van de Rijn. [Doctoral Dissertation]. Agricultural University; 1997. Available from: http://library.wur.nl/WebQuery/wurpubs/38848 ; urn:nbn:nl:ui:32-38848 ; urn:nbn:nl:ui:32-38848 ; http://library.wur.nl/WebQuery/wurpubs/38848

23. Hordijk, C.A. Sulfur and carbon cycling in a stratifying freshwater lake.

Degree: 1993, Agricultural University

URL: http://library.wur.nl/WebQuery/wurpubs/23394 ; urn:nbn:nl:ui:32-23394 ; urn:nbn:nl:ui:32-23394 ; http://library.wur.nl/WebQuery/wurpubs/23394

► This thesis is a synopsis of a ten-years research on the anaerobic breakdown of organic matter in the stratifying Lake Vechten. Special attention has… (more)

▼ This thesis is a synopsis of a ten-years research on the anaerobic breakdown of organic matter in the stratifying Lake Vechten. Special attention has been paid to the sulfur cycle and how this cycle interacts with carbon mineralization. The sediment plays an important role in the breakdown of organic matter in freshwater ecosystems. Until a few years ago, there was no insight in how mineralization processes were spatial organized in the sediment. New analytical developments have enabled to measure the steep concentration profiles in flocculent sediment layers of a few cm. These techniques are discussed in the second chapter of this thesis. Chapter 3 is more focused on field data collection and evaluation and Chapter 4 is discussing perspectives for future research. The study in Lake Vechten demonstrated that the penetration depth of O ₂ , NO ₃^-, and SO ₄^2-into the sediment can be limited to a few mm till a few cm in freshwaters. This is a crucial difference with marine systems where SO ₄^2-usually penetrates much deeper. This difference makes it also expectable that microbial kinetics in freshwaters differ from those in marine sediments. The ability to measure concentration profiles across narrow depth intervals has open new ways to estimate electron acceptor consumptions by mathematical modeling. To support modeling, diffusion coefficients, adsorption effects, and kinetics were determined independently. The uptake of sulfate and nitrate in sediment in batches collected form the respiring horizon followed a first order kinetics. This indicates that electron limitation occurs in the top layer of the sediment. Assuming first order kinetics and using the measured concentration profiles, sulfate and nitrate consumption rates were estimated by the model of Berner. The estimated rates for sulfate reduction were twice lower that the values obtained from the batch experiments. A notable result of the batch experiments was the fast uptake rate of nitrate and sulfate in the batches collected from the methanogenic horizon (3-7 cm). Under in situ conditions, nitrate and sulfate will not penetrate till this horizon. The absence of a 'lag time' indicated the presence of a vital sulfate and nitrate reducing community in sediment of approximately 6-14 years old. In the second stage in this study we examined if the accumulated total sulfur in the sediment could give an indication on sulfate reduction rates integrated over a longer period. By comparison sulfate reduction rates and total sulfur sedimentation rates with the actual amount of sulfur present in the sediment, it appears that only about 15% of the annual sulfur input is permanently buried in the sediment. Thus, more than 80% of the sulfur is released again into the lake water column. This idea was supported by the concentration profiles of sulfur species seen in the lake-water column. The lake-water measurements also revealed that substantial more sulfur bearing species were… Advisors/Committee Members: N. van Breemen, T.E. Cappenberg.

Subjects/Keywords: biocenose; ecosystemen; kringlopen; biogeochemie; koolstof; zwavel; meren; reservoirs; plassen; chemische eigenschappen; waterverontreiniging; waterkwaliteit; eutrofiëring; ecofysiologie; waterbodems; Aquatische ecologie; biocoenosis; ecosystems; cycling; biogeochemistry; carbon; sulfur; lakes; reservoirs; ponds; chemical properties; water pollution; water quality; eutrophication; ecophysiology; water bottoms; Aquatic Ecology

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APA (6^th Edition):

Hordijk, C. A. (1993). Sulfur and carbon cycling in a stratifying freshwater lake. (Doctoral Dissertation). Agricultural University. Retrieved from http://library.wur.nl/WebQuery/wurpubs/23394 ; urn:nbn:nl:ui:32-23394 ; urn:nbn:nl:ui:32-23394 ; http://library.wur.nl/WebQuery/wurpubs/23394

Chicago Manual of Style (16^th Edition):

Hordijk, C A. “Sulfur and carbon cycling in a stratifying freshwater lake.” 1993. Doctoral Dissertation, Agricultural University. Accessed January 25, 2021. http://library.wur.nl/WebQuery/wurpubs/23394 ; urn:nbn:nl:ui:32-23394 ; urn:nbn:nl:ui:32-23394 ; http://library.wur.nl/WebQuery/wurpubs/23394.

MLA Handbook (7^th Edition):

Hordijk, C A. “Sulfur and carbon cycling in a stratifying freshwater lake.” 1993. Web. 25 Jan 2021.

Vancouver:

Hordijk CA. Sulfur and carbon cycling in a stratifying freshwater lake. [Internet] [Doctoral dissertation]. Agricultural University; 1993. [cited 2021 Jan 25]. Available from: http://library.wur.nl/WebQuery/wurpubs/23394 ; urn:nbn:nl:ui:32-23394 ; urn:nbn:nl:ui:32-23394 ; http://library.wur.nl/WebQuery/wurpubs/23394.

Council of Science Editors:

Hordijk CA. Sulfur and carbon cycling in a stratifying freshwater lake. [Doctoral Dissertation]. Agricultural University; 1993. Available from: http://library.wur.nl/WebQuery/wurpubs/23394 ; urn:nbn:nl:ui:32-23394 ; urn:nbn:nl:ui:32-23394 ; http://library.wur.nl/WebQuery/wurpubs/23394

24. Sinke, A.J.C. Phosphorus dynamics in the sediment of a eutrophic lake.

Degree: 1992, Agricultural University

URL: http://library.wur.nl/WebQuery/wurpubs/19142 ; urn:nbn:nl:ui:32-19142 ; urn:nbn:nl:ui:32-19142 ; http://library.wur.nl/WebQuery/wurpubs/19142

► Since the sixties eutrophication has been recognized to affect the quality of surface waters. The prolonged loading with nutrients has led to high algal… (more)

▼ Since the sixties eutrophication has been recognized to affect the quality of surface waters. The prolonged loading with nutrients has led to high algal concentrations in the water and to concommitant environmental problems such as the depletion of oxygen, the production of toxins and the development of tedious animal populations e.g. bream. A series of management measures have been carried out to combat eutrophication in the Netherlands. However, despite all efforts, the majority of the dutch surface waters is still considered to be eutrophic. The disappointing results are often attributed to processes in the sediment that can delay the improvement of the water quality. This thesis deals with the phosphorus dynamics in the sediment of an eutrophic lake. In contrast to most studies which are chemically orientated, attention here is mainly given to the role of microbial processes in the phosphorus cycle. The research was performed in eutrophic Lake Loosdrecht where the external phosphorus loading was recently decreased from 35-40 to 10-15 mmol.m ^-2.y ^-1. The importance of microbial processes for the release of phosphate by the sediment was investigated by comparing sterilized and non-sterilized columns (chapter 2). Columns were sterilized by γ-irradiation (25 kGy). The combination of temperature and γ-irradiation experiments made it possible to distinguish between microbial and physico-chemical processes. The release of dissolved phosphate from the sediment is controlled by microbial processes on a short-term and a long-term basis. Microbial mediated release responds directly on an increase in temperature. This is probably due to the induction of changes in the chemical environment such as a decrease in oxygen content of the surface layer. Mineralization of organic matter results in a mobilization of phosphate and is prerequisite to sustain the phosphate release on a long-term basis. Phosphate fluxes over the sediment-water interface were calculated using measured concentration gradients in the pore water and were compared to fluxes measured under laboratory conditions (chapter 3). Results were analysed with a statistical method (Redundancy Analysis) to detect patterns of variation in pore water chemistry and in measured and calculated fluxes, that could be ascribed to environmental variables. Initial fluxes of phosphate measured in sediment columns, which varied between -7.7 and 1330 μmol.m ^-2.d ^-1, correlated significantly with the calculated fluxes over the sediment-water interface. The high correlation between calculated fluxes of ammonia, phosphate and methane and measured initial flux of phosphate, conclusively pointed to mineralization of organic matter as driving force for phosphate release from the sediment. Redundancy Analysis demonstrated that the rates of mineralization and of phosphate release are high in autumn. This was ascribed to an increased sedimentation at the end of the growing season. The importance of anaerobic mineralization processes… Advisors/Committee Members: A.J.B. Zehnder, T.E. Cappenberg.

Subjects/Keywords: meren; reservoirs; plassen; algen; assimilatie; fosfor; rivieren; waterlopen; kanalen; oppervlaktewater; waterverontreiniging; waterkwaliteit; waterbeheer; nitraten; stilstaand water; groei; plantenontwikkeling; nederland; utrecht; waterbodems; lakes; reservoirs; ponds; algae; assimilation; phosphorus; rivers; streams; canals; surface water; water pollution; water quality; water management; nitrates; standing water; growth; plant development; netherlands; utrecht; water bottoms

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sinke, A. J. C. (1992). Phosphorus dynamics in the sediment of a eutrophic lake. (Doctoral Dissertation). Agricultural University. Retrieved from http://library.wur.nl/WebQuery/wurpubs/19142 ; urn:nbn:nl:ui:32-19142 ; urn:nbn:nl:ui:32-19142 ; http://library.wur.nl/WebQuery/wurpubs/19142

Chicago Manual of Style (16^th Edition):

Sinke, A J C. “Phosphorus dynamics in the sediment of a eutrophic lake.” 1992. Doctoral Dissertation, Agricultural University. Accessed January 25, 2021. http://library.wur.nl/WebQuery/wurpubs/19142 ; urn:nbn:nl:ui:32-19142 ; urn:nbn:nl:ui:32-19142 ; http://library.wur.nl/WebQuery/wurpubs/19142.

MLA Handbook (7^th Edition):

Sinke, A J C. “Phosphorus dynamics in the sediment of a eutrophic lake.” 1992. Web. 25 Jan 2021.

Vancouver:

Sinke AJC. Phosphorus dynamics in the sediment of a eutrophic lake. [Internet] [Doctoral dissertation]. Agricultural University; 1992. [cited 2021 Jan 25]. Available from: http://library.wur.nl/WebQuery/wurpubs/19142 ; urn:nbn:nl:ui:32-19142 ; urn:nbn:nl:ui:32-19142 ; http://library.wur.nl/WebQuery/wurpubs/19142.

Council of Science Editors:

Sinke AJC. Phosphorus dynamics in the sediment of a eutrophic lake. [Doctoral Dissertation]. Agricultural University; 1992. Available from: http://library.wur.nl/WebQuery/wurpubs/19142 ; urn:nbn:nl:ui:32-19142 ; urn:nbn:nl:ui:32-19142 ; http://library.wur.nl/WebQuery/wurpubs/19142

25. Vermeulen, J. Ripening of PAH and TPH polluted sediments : determination and quantification of bioremediation parameters.

Degree: 2007, NARCIS

URL: http://library.wur.nl/WebQuery/wurpubs/351455 ; urn:nbn:nl:ui:32-351455 ; urn:nbn:nl:ui:32-351455 ; http://library.wur.nl/WebQuery/wurpubs/351455

► In this study, bioremediation parameters were determined and quantified for different clayey dredged sediments. The research described in this thesis increased the insight into the… (more)

Subjects/Keywords: bioremediëring; sediment; verontreiniging; mineralisatie; mineraaloliën; polycyclische koolwaterstoffen; aardoliekoolwaterstoffen; bodemvorming; organisch bodemmateriaal; oxidatie; zwavel; degradatie; waterbodems; Bodemverontreiniging; bioremediation; sediment; pollution; mineralization; mineral oils; polycyclic hydrocarbons; petroleum hydrocarbons; soil formation; soil organic matter; oxidation; sulfur; degradation; water bottoms; Soil Pollution

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Vermeulen, J. (2007). Ripening of PAH and TPH polluted sediments : determination and quantification of bioremediation parameters. (Doctoral Dissertation). NARCIS. Retrieved from http://library.wur.nl/WebQuery/wurpubs/351455 ; urn:nbn:nl:ui:32-351455 ; urn:nbn:nl:ui:32-351455 ; http://library.wur.nl/WebQuery/wurpubs/351455

Chicago Manual of Style (16^th Edition):

Vermeulen, J. “Ripening of PAH and TPH polluted sediments : determination and quantification of bioremediation parameters.” 2007. Doctoral Dissertation, NARCIS. Accessed January 25, 2021. http://library.wur.nl/WebQuery/wurpubs/351455 ; urn:nbn:nl:ui:32-351455 ; urn:nbn:nl:ui:32-351455 ; http://library.wur.nl/WebQuery/wurpubs/351455.

MLA Handbook (7^th Edition):

Vermeulen, J. “Ripening of PAH and TPH polluted sediments : determination and quantification of bioremediation parameters.” 2007. Web. 25 Jan 2021.

Vancouver:

Vermeulen J. Ripening of PAH and TPH polluted sediments : determination and quantification of bioremediation parameters. [Internet] [Doctoral dissertation]. NARCIS; 2007. [cited 2021 Jan 25]. Available from: http://library.wur.nl/WebQuery/wurpubs/351455 ; urn:nbn:nl:ui:32-351455 ; urn:nbn:nl:ui:32-351455 ; http://library.wur.nl/WebQuery/wurpubs/351455.

Council of Science Editors:

Vermeulen J. Ripening of PAH and TPH polluted sediments : determination and quantification of bioremediation parameters. [Doctoral Dissertation]. NARCIS; 2007. Available from: http://library.wur.nl/WebQuery/wurpubs/351455 ; urn:nbn:nl:ui:32-351455 ; urn:nbn:nl:ui:32-351455 ; http://library.wur.nl/WebQuery/wurpubs/351455

26. Duin, van, E.H.S. Sediment transport, light and algal growth in the Markermeer : a two-dimensional water quality model for a shallow lake.

Degree: 1992, Agricultural University

URL: http://library.wur.nl/WebQuery/wurpubs/19233 ; urn:nbn:nl:ui:32-19233 ; urn:nbn:nl:ui:32-19233 ; http://library.wur.nl/WebQuery/wurpubs/19233

► This thesis reports on a study of the water quality in the Markermeer, focusing on the relationships between sediment transport, the light field and… (more)

Subjects/Keywords: meren; reservoirs; plassen; water; sediment; cyanobacteriën; algen; hydrologie; limnologie; fysische eigenschappen; waterkwaliteit; waterbeheer; straling; licht; lichtdoorlating; reflectie; refractie; absorptie; emissie; groei; plantenontwikkeling; modellen; onderzoek; oscillatoria agardhii; nederland; schizophyceae; optica; biologische eigenschappen; flevoland; waterbodems; lakes; reservoirs; ponds; water; sediment; cyanobacteria; algae; hydrology; limnology; physical properties; water quality; water management; radiation; light; light transmission; reflection; refraction; absorption; emission; growth; plant development; models; research; oscillatoria agardhii; netherlands; schizophyceae; optics; biological properties; water bottoms; flevoland

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Duin, van, E. H. S. (1992). Sediment transport, light and algal growth in the Markermeer : a two-dimensional water quality model for a shallow lake. (Doctoral Dissertation). Agricultural University. Retrieved from http://library.wur.nl/WebQuery/wurpubs/19233 ; urn:nbn:nl:ui:32-19233 ; urn:nbn:nl:ui:32-19233 ; http://library.wur.nl/WebQuery/wurpubs/19233

Chicago Manual of Style (16^th Edition):

Duin, van, E H S. “Sediment transport, light and algal growth in the Markermeer : a two-dimensional water quality model for a shallow lake.” 1992. Doctoral Dissertation, Agricultural University. Accessed January 25, 2021. http://library.wur.nl/WebQuery/wurpubs/19233 ; urn:nbn:nl:ui:32-19233 ; urn:nbn:nl:ui:32-19233 ; http://library.wur.nl/WebQuery/wurpubs/19233.

MLA Handbook (7^th Edition):

Duin, van, E H S. “Sediment transport, light and algal growth in the Markermeer : a two-dimensional water quality model for a shallow lake.” 1992. Web. 25 Jan 2021.

Vancouver:

Duin, van EHS. Sediment transport, light and algal growth in the Markermeer : a two-dimensional water quality model for a shallow lake. [Internet] [Doctoral dissertation]. Agricultural University; 1992. [cited 2021 Jan 25]. Available from: http://library.wur.nl/WebQuery/wurpubs/19233 ; urn:nbn:nl:ui:32-19233 ; urn:nbn:nl:ui:32-19233 ; http://library.wur.nl/WebQuery/wurpubs/19233.

Council of Science Editors:

Duin, van EHS. Sediment transport, light and algal growth in the Markermeer : a two-dimensional water quality model for a shallow lake. [Doctoral Dissertation]. Agricultural University; 1992. Available from: http://library.wur.nl/WebQuery/wurpubs/19233 ; urn:nbn:nl:ui:32-19233 ; urn:nbn:nl:ui:32-19233 ; http://library.wur.nl/WebQuery/wurpubs/19233

27. King, Jessica. The succession of a contaminated floodplain: reclaiming the West Bottoms.

Degree: Master of Landscape Architecture or Regional and Community Planning, Department of Landscape Architecture/Regional and Community Planning, 2013, Kansas State University

URL: http://hdl.handle.net/2097/15683

► Kansas City is expecting a 25% growth in population by 2050. This design proposal promotes West Bottoms as a potential area to house some of… (more)

▼ Kansas City is expecting a 25% growth in population by 2050. This design proposal promotes West Bottoms as a potential area to house some of the new population, and more importantly supply a live and work community for these people. West Bottoms is also home to major industry in Kansas City as well as an up and coming art culture. West Bottoms has great potential for a community that allows the existing and new population to be a part of a live-work-play community with the vacancies in the area. The projected population growth is expected to promote sprawl, further increasing the average driving time to the city. West Bottoms currently has few connections to the downtown and offers few reasons to come to the area. These connections are mainly major bridges or highways. Another issue West Bottoms faces is flooding problems from OK Creek and Turkey Creek, which lead into the Kansas and Missouri Rivers. Finally, post and present industrial soil contamination threatens the groundwater. When mixed with flooding concerns, this contamination is potentially harmful for the health of downstream cities. Drawing inspiration from travels, Kansas City charm, plants, art, and water storage, case studies were researched. Themes from each case study were quantified. These themes paired with inventory and analysis of the West Bottoms provided the basis for the design proposed here. The successional design of the area will progress from a contaminated landscape to a landscape that holds floodwater. The final design holds all of the stormwater from the 100 year 1, 2, 3, 6, 12, and 24 hour rain events. The final design incorporates areas of learning, a variety of paths and seating, a live-work-play community, clean and creative industry, and an art culture that sustains the excitement for the timeline of succession. Overtime this landscape will evolve into a new destination for Kansas City using an integrated solution remediating the soil and holding flood waters as an amenity for the new population. Advisors/Committee Members: Timothy Keane.

Subjects/Keywords: Natural Succession; Flood Storage; Phytoremediation; West Bottoms, Kansas City; Wastewater Treatment; Informal Environmental Learning; Area Planning and Development (0341); Design (0389); Ecology (0329); Environmental education (0442); Environmental Health (0470); Environmental Studies (0477); Landscape Architecture (0390); Land Use Planning (0536); Plant Sciences (0479); Sustainability (0640); Urban Planning (0999); Water Resource Management (0595)

…list of figures 01 figure 1.01 \\ 004 Disconnect of the West Bottoms to… …Kansas City. (by Author) figure 1.02 \\ 006 West Bottoms Connections to… …x28;MARC, n.d.) West Bottoms Industrial and Historic Character. (by Author)… …x5C; 012 West Bottoms Flooding. (KCDC, 2010) Napa River Valley Natural Channel… …and Google, 2013) Basemap of the West Bottoms Catchment. (King, KCDC, and MARC…

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APA (6^th Edition):

King, J. (2013). The succession of a contaminated floodplain: reclaiming the West Bottoms. (Masters Thesis). Kansas State University. Retrieved from http://hdl.handle.net/2097/15683

Chicago Manual of Style (16^th Edition):

King, Jessica. “The succession of a contaminated floodplain: reclaiming the West Bottoms.” 2013. Masters Thesis, Kansas State University. Accessed January 25, 2021. http://hdl.handle.net/2097/15683.

MLA Handbook (7^th Edition):

King, Jessica. “The succession of a contaminated floodplain: reclaiming the West Bottoms.” 2013. Web. 25 Jan 2021.

Vancouver:

King J. The succession of a contaminated floodplain: reclaiming the West Bottoms. [Internet] [Masters thesis]. Kansas State University; 2013. [cited 2021 Jan 25]. Available from: http://hdl.handle.net/2097/15683.

Council of Science Editors:

King J. The succession of a contaminated floodplain: reclaiming the West Bottoms. [Masters Thesis]. Kansas State University; 2013. Available from: http://hdl.handle.net/2097/15683

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