subject:(Sorption)

University of Waterloo

1. Lai, Shuixiu. Sorptive separation of phenolic compounds from wastewater.

Degree: 2017, University of Waterloo

► This study explores the potential of using PEBA as a sorbent for removing phenolic compounds from wastewater. The sorption isotherms of phenol, 4-chlorophenol (4-CP), 4-nitrophenol… (more)

▼ This study explores the potential of using PEBA as a sorbent for removing phenolic compounds from wastewater. The sorption isotherms of phenol, 4-chlorophenol (4-CP), 4-nitrophenol (4-NP), 4-methylphenol (4-MP) and catechol from their respective single solute solutions were studied based on the Linear, Langmuir and Freundlich models. The Freundlich model was shown to be suitable to represent the equilibrium sorption of all the phenolic compounds in the PEBA sorbent, and the sorption capacity of these phenolic compounds in PEBA is in the order: catechol<phenol<4-MP<4-NP<4-CP. Thermodynamic analysis revealed that phenol sorption in PEBA was a spontaneous exothermic process. The sorption kinetics was studied using PEBA sorbent in the form of a flat membrane with well-defined dimensions to help identify the mechanism and rate controlling step of the sorption process. The kinetic data were fitted with the pseudo-first and -second order models as well as the diffusion model. The pseudo-second order model was shown to fit the experimental data better than the pseudo-first order model, and an oversight in the model fitting with regard to equilibrium sorption capacity in prior work was discussed and corrected. Sorption of phenol, 4-CP, 4-NP, 4-MP and catechol in PEBA was represented by the pseudo-second order model, while mass diffusion inside the sorbent was not negligible for thick membranes. Multi-solute sorption isotherms and kinetics were determined for binary and quinary solute systems. The competitive Freundlich model and the IAST model were fitted to the equilibrium data. It was found that the competitive Freundlich model was adequate to represent isotherms for all binary solute systems studied; however, there was a considerable deviation between the model predictions and the experimental data in the quinary solute system. Strongly sorbed solutes tended to inhibit the sorption of weakly sorbed solutes. The sorption competition was shown to affect the sorption kinetics of individual solutes, and such effect was found to be related to the molecular size of the sorbate component and its affinity to the sorbent. Chemical elution, thermal regeneration and vacuum-assisted thermal regeneration were proposed and studied for regeneration of PEBA sorbent exhausted with the phenolic compounds. Ethanol, methanol and NaOH solution were all effective regenerants for the sorbent, and no significant change in the sorption characteristics was observed for a number of sorption-regeneration cycles. Thermal regeneration (90°C for 2 h) was also effective for regenerating PEBA exhausted with phenol and 4-MP. When exhausted with 4-MP, the PEBA sorbent could be regenerated using vacuum-assisted thermal regeneration (80°C for 3 h at a vacuum pressure of 5 kPa), and highly concentrated solutions (≈70,000 ppm) of 4-MP were collected. PEBA fibres were prepared and immobilized in a packed-bed for column sorption studies. The effects of inlet feed concentration, flow rate, fibre diameter and flow interruption on the breakthrough…

Subjects/Keywords: PEBA; phenolic compounds; sorption isotherms; sorption kinetics; packed-bed sorption; regeneration; multi-solute sorption

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APA (6^th Edition):

Lai, S. (2017). Sorptive separation of phenolic compounds from wastewater. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/11813

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):

Lai, Shuixiu. “Sorptive separation of phenolic compounds from wastewater.” 2017. Thesis, University of Waterloo. Accessed March 02, 2021. http://hdl.handle.net/10012/11813.

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

MLA Handbook (7^th Edition):

Lai, Shuixiu. “Sorptive separation of phenolic compounds from wastewater.” 2017. Web. 02 Mar 2021.

Vancouver:

Lai S. Sorptive separation of phenolic compounds from wastewater. [Internet] [Thesis]. University of Waterloo; 2017. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/10012/11813.

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

Council of Science Editors:

Lai S. Sorptive separation of phenolic compounds from wastewater. [Thesis]. University of Waterloo; 2017. Available from: http://hdl.handle.net/10012/11813

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

Virginia Tech

2. Fahrenfeld, Nicole Leah. Fate of 2,4,6-trinitrotoluene (TNT) in historically contaminated aquifer sediments.

Degree: PhD, Civil Engineering, 2012, Virginia Tech

URL: http://hdl.handle.net/10919/37811

► The nitroaromatic explosive 2,4,6-trinitrotoluene is a widespread, toxic groundwater contaminant. The objective of this work was to describe TNT fate in contaminated aquifer sediments. A… (more)

▼ The nitroaromatic explosive 2,4,6-trinitrotoluene is a widespread, toxic groundwater contaminant. The objective of this work was to describe TNT fate in contaminated aquifer sediments. A series of bench scale experiments and model simulations were performed to evaluate the fate of TNT in historically contaminated aquifer sediments. A TNT contaminated site on the National Priorities List, Former Nansemond Ordnance Depot (FNOD), Suffolk, VA, served as the model site for this work. To describe desorption rate in contaminated sediments, two approaches for a first order single-site desorption were evaluated. In Model 1, the driving force for desorption is mathematically related to the sorbed phase concentrations, whereas in Model 2 the rate is based on aqueous phase concentrations. Two data sets were used to evaluate the models: (1) batch draw-and-fill experiments using FNOD sediment and (2) results from a previously published report from the Louisiana Army Ammunition Plant. Both models provided adequate fit, but Model 2 was better behaved and first order parameters fell within a smaller confidence interval. Draw-and-fill experiments were observed to yield first-order mass transfer coefficients well aligned with those derived from column experiments. The effect of organic amendments on anaerobic TNT degradation rate and microbial community structure in culture enriched from the FNOD site was studied in batch anaerobic microcosms. TNT readily degraded under all experimental conditions. A reductive pathway of TNT degradation was observed across all conditions, however, denaturing gradient gel electrophoresis (DGGE) analysis revealed distinct bacterial community compositions. In all microcosms, Gram-negative γ- or β-Proteobacteria and Gram-positive Negativicutes or Clostridia were observed. According to non-metric multidimensional scaling analysis of DGGE profiles, the microcosm communities were most similar to field site sediment corresponding to the highest TNT concentration, relative to moderately and uncontaminated sediments, suggesting that TNT contamination itself is a major driver of microbial community structure. Candidate degraders were identified and a Pseudomonas sp. was observed to be stimulated under all conditions, which was confirmed to rapidly degrade TNT in pure culture. Mathematical modeling of the batch microcosm results revealed that TNT degraded 1.7 times faster in lactate amended microcosms than in ethanol amended microcosms, which degraded 3.0 times faster than natural organic matter amended microcosms. Simulation of the TNT degradation pathway included determination of branching coefficients representing whether the first reduction of nitro group occurred in the ortho or para position or whether TNT was removed from the aqueous phase (i.e. bound to dissolved organic matter). Branching coefficients were greater for initial reduction of para (17-27% initial TNT concentration) over ortho (3-9% initial TNT concentration) for all test conditions. However, a greater degradate recovery and a different… Advisors/Committee Members: Schreiber, Madeline E. (committee member), Vikesland, Peter J. (committee member), Widdowson, Mark A. (committeecochair), Pruden, Amy (committeecochair).

Subjects/Keywords: sorption; bioremediation; TNT

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APA (6^th Edition):

Fahrenfeld, N. L. (2012). Fate of 2,4,6-trinitrotoluene (TNT) in historically contaminated aquifer sediments. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/37811

Chicago Manual of Style (16^th Edition):

Fahrenfeld, Nicole Leah. “Fate of 2,4,6-trinitrotoluene (TNT) in historically contaminated aquifer sediments.” 2012. Doctoral Dissertation, Virginia Tech. Accessed March 02, 2021. http://hdl.handle.net/10919/37811.

MLA Handbook (7^th Edition):

Fahrenfeld, Nicole Leah. “Fate of 2,4,6-trinitrotoluene (TNT) in historically contaminated aquifer sediments.” 2012. Web. 02 Mar 2021.

Vancouver:

Fahrenfeld NL. Fate of 2,4,6-trinitrotoluene (TNT) in historically contaminated aquifer sediments. [Internet] [Doctoral dissertation]. Virginia Tech; 2012. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/10919/37811.

Council of Science Editors:

Fahrenfeld NL. Fate of 2,4,6-trinitrotoluene (TNT) in historically contaminated aquifer sediments. [Doctoral Dissertation]. Virginia Tech; 2012. Available from: http://hdl.handle.net/10919/37811

Ruhr Universität Bochum

3. Tanner, Lukas. Optimierung von Sorptionsvorgängen bei Feinreinigung inerter Schutzgase.

Degree: 2011, Ruhr Universität Bochum

URL: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-34824

► Zur Erhöhung der Produktqualität von Leuchtmitteln ist es erforderlich, Schutzgas für Handschuh-Kästen, s.g. Gloveboxen, mit hoher Reinheit bereitzustellen. Da das Schutzgas wiederverwendet werden muss, wird… (more)

Subjects/Keywords: Sorption; Gasreinigung; Argon; Wasser; Sauerstoff

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APA (6^th Edition):

Tanner, L. (2011). Optimierung von Sorptionsvorgängen bei Feinreinigung inerter Schutzgase. (Thesis). Ruhr Universität Bochum. Retrieved from http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-34824

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):

Tanner, Lukas. “Optimierung von Sorptionsvorgängen bei Feinreinigung inerter Schutzgase.” 2011. Thesis, Ruhr Universität Bochum. Accessed March 02, 2021. http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-34824.

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

MLA Handbook (7^th Edition):

Tanner, Lukas. “Optimierung von Sorptionsvorgängen bei Feinreinigung inerter Schutzgase.” 2011. Web. 02 Mar 2021.

Vancouver:

Tanner L. Optimierung von Sorptionsvorgängen bei Feinreinigung inerter Schutzgase. [Internet] [Thesis]. Ruhr Universität Bochum; 2011. [cited 2021 Mar 02]. Available from: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-34824.

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

Council of Science Editors:

Tanner L. Optimierung von Sorptionsvorgängen bei Feinreinigung inerter Schutzgase. [Thesis]. Ruhr Universität Bochum; 2011. Available from: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-34824

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

Ruhr Universität Bochum

4. Rother, Jens. Systematische Untersuchung von festen und flüssigen Sorbentien für die Reinigung wasserstoffhaltiger und biogener Gase.

Degree: 2012, Ruhr Universität Bochum

URL: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-36671

► Ziel dieser Arbeit war die systematische Untersuchung diverser Sorbentien für die Beurteilung der Reinigung wasserstoffhaltiger und biogener Gase. Zu diesem Zweck wurde eine volumetrische Multiprobenapparatur… (more)

Subjects/Keywords: Sorption; Biogas; Magnetschwebewaage; Aktivkohle; Gasgemisch

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APA (6^th Edition):

Rother, J. (2012). Systematische Untersuchung von festen und flüssigen Sorbentien für die Reinigung wasserstoffhaltiger und biogener Gase. (Thesis). Ruhr Universität Bochum. Retrieved from http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-36671

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):

Rother, Jens. “Systematische Untersuchung von festen und flüssigen Sorbentien für die Reinigung wasserstoffhaltiger und biogener Gase.” 2012. Thesis, Ruhr Universität Bochum. Accessed March 02, 2021. http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-36671.

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

MLA Handbook (7^th Edition):

Rother, Jens. “Systematische Untersuchung von festen und flüssigen Sorbentien für die Reinigung wasserstoffhaltiger und biogener Gase.” 2012. Web. 02 Mar 2021.

Vancouver:

Rother J. Systematische Untersuchung von festen und flüssigen Sorbentien für die Reinigung wasserstoffhaltiger und biogener Gase. [Internet] [Thesis]. Ruhr Universität Bochum; 2012. [cited 2021 Mar 02]. Available from: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-36671.

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

Council of Science Editors:

Rother J. Systematische Untersuchung von festen und flüssigen Sorbentien für die Reinigung wasserstoffhaltiger und biogener Gase. [Thesis]. Ruhr Universität Bochum; 2012. Available from: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-36671

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

University of Auckland

5. Song, Yantao. Trace metal speciation in complex aquatic environments : the copper, cadmium, ferrihydrite, phthalic acid and bacterial system.

Degree: 2009, University of Auckland

URL: http://hdl.handle.net/2292/5229

► Trace metal speciation in aquatic environments is inherently complex due to the large number of possible interactions with dissolved and particulate components. Adsorption onto iron… (more)

▼ Trace metal speciation in aquatic environments is inherently complex due to the large number of possible interactions with dissolved and particulate components. Adsorption onto iron oxyhydroxide and bacterial surfaces, as well as the formation of metal-ligand complexes can play important roles in controlling the fate and transport of trace metals in natural environments. The objective of this study is to describe and understand metal speciation and distribution in a complex biogeochemical system by incrementally increasing the complexity from simple binary systems to a dynamic quaternary system containing a trace metal, iron oxide and bacteria that are active and metabolizing an organic ligand. Copper, cadmium, and phthalic acid (H2Lp) adsorption onto ferrihydrite in binary systems was well reproduced using the diffuse layer model (DLM). The adsorption of H2Lp adsorption was analogous to that of inorganic diprotic acids in terms of the relationship between the adsorption constants and acidity constants. In ternary systems H2Lp caused Cu2+ or Cd2+ adsorption to be either enhanced (due to surface ternary complex formation) or inhibited (due to solution complex formation) depending on the conditions. The DLM could only describe the effect of H2Lp on metal ion sorption by including ternary complexes of the form ???FeOHMLp (0), where ???FeOH is a surface site and M is Cu or Cd. The relationship between binary metal adsorption constants and the ternary complex adsorption constants from this and previous studies suggest several properties of ternary complexes. First, ternary complex structures on both ferrihydrite and goethite are either the same or similar. Second, those cations having large adsorption constants also have large equilibrium constants for ternary complex formation. Third, ligands forming stronger solution complexes with cations will also form stronger surface ternary complexes but because of the strong solution complexes these ligands will not necessarily enhance cation adsorption. The bacterial strain Comamonas spp. was isolated from the activated sludge of a wastewater treatment plant. Comamonas spp. could effectively degrade H2Lp in the presence of Cd2+ and ferrihydrite and was therefore chosen to study the effect of H2Lp degradation on Cd2+ speciation. Proton, cadmium and H2Lp adsorption onto Comamonas spp. were measured. The Comamonas spp. titration curve is flatter than that of ferrihydrite, indicating a higher degree of site heterogeneity at the bacterial surface. Adsorption edges of Cd2+ adsorption onto Comamonas spp. occurred over about 4~5 pH units compared to those of ferrihydrite which occurred over ??? 2 pH units on a dry weight basis. Comamonas spp. can accumulate a larger amount of Cd2+ than ferrihydrite especially under lower pH conditions. Proton and Cd2+ adsorption onto Comamonas spp. cells over a wide sorbent/sorbate and pH range was reasonably well described by a four site non-electrostatic model. The acid-base and Cd2+ adsorption behaviour of Comamonas… Advisors/Committee Members: Dr Naresh Singhal, Dr Peter James Swedlund, Dr Simon Swift.

Subjects/Keywords: Trace Metal; Bacteria; Ferrihydrite; Sorption

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APA (6^th Edition):

Song, Y. (2009). Trace metal speciation in complex aquatic environments : the copper, cadmium, ferrihydrite, phthalic acid and bacterial system. (Doctoral Dissertation). University of Auckland. Retrieved from http://hdl.handle.net/2292/5229

Chicago Manual of Style (16^th Edition):

Song, Yantao. “Trace metal speciation in complex aquatic environments : the copper, cadmium, ferrihydrite, phthalic acid and bacterial system.” 2009. Doctoral Dissertation, University of Auckland. Accessed March 02, 2021. http://hdl.handle.net/2292/5229.

MLA Handbook (7^th Edition):

Song, Yantao. “Trace metal speciation in complex aquatic environments : the copper, cadmium, ferrihydrite, phthalic acid and bacterial system.” 2009. Web. 02 Mar 2021.

Vancouver:

Song Y. Trace metal speciation in complex aquatic environments : the copper, cadmium, ferrihydrite, phthalic acid and bacterial system. [Internet] [Doctoral dissertation]. University of Auckland; 2009. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/2292/5229.

Council of Science Editors:

Song Y. Trace metal speciation in complex aquatic environments : the copper, cadmium, ferrihydrite, phthalic acid and bacterial system. [Doctoral Dissertation]. University of Auckland; 2009. Available from: http://hdl.handle.net/2292/5229

Stony Brook University

6. Lorenz, Emily Ann. Role of Speciation in Tungstate Sorption on Iron Oxyhydroxides: A Spectroscopic Study .

Degree: 2009, Stony Brook University

URL: http://hdl.handle.net/1951/52248

Subjects/Keywords: Tungstate sorption

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APA (6^th Edition):

Lorenz, E. A. (2009). Role of Speciation in Tungstate Sorption on Iron Oxyhydroxides: A Spectroscopic Study . (Thesis). Stony Brook University. Retrieved from http://hdl.handle.net/1951/52248

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):

Lorenz, Emily Ann. “Role of Speciation in Tungstate Sorption on Iron Oxyhydroxides: A Spectroscopic Study .” 2009. Thesis, Stony Brook University. Accessed March 02, 2021. http://hdl.handle.net/1951/52248.

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

MLA Handbook (7^th Edition):

Lorenz, Emily Ann. “Role of Speciation in Tungstate Sorption on Iron Oxyhydroxides: A Spectroscopic Study .” 2009. Web. 02 Mar 2021.

Vancouver:

Lorenz EA. Role of Speciation in Tungstate Sorption on Iron Oxyhydroxides: A Spectroscopic Study . [Internet] [Thesis]. Stony Brook University; 2009. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/1951/52248.

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

Council of Science Editors:

Lorenz EA. Role of Speciation in Tungstate Sorption on Iron Oxyhydroxides: A Spectroscopic Study . [Thesis]. Stony Brook University; 2009. Available from: http://hdl.handle.net/1951/52248

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

Clemson University

7. Neuendorf, Morgan. Prescribed Fire-Induced Changes in Soil Properties of the Southeastern Forests of the United States: Sorption Behavior of Polar and Nonpolar Compounds.

Degree: MS, Environmental Engineering and Earth Sciences, 2020, Clemson University

URL: https://tigerprints.clemson.edu/all_theses/3425

► Due to an increase in wildfires across the US and world, prescribed fires are implemented to reduce fuel loads. Obvious changes occur in the… (more)

Subjects/Keywords: Fire; Nonpolar; Polar; Soil; Sorption

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APA (6^th Edition):

Neuendorf, M. (2020). Prescribed Fire-Induced Changes in Soil Properties of the Southeastern Forests of the United States: Sorption Behavior of Polar and Nonpolar Compounds. (Masters Thesis). Clemson University. Retrieved from https://tigerprints.clemson.edu/all_theses/3425

Chicago Manual of Style (16^th Edition):

Neuendorf, Morgan. “Prescribed Fire-Induced Changes in Soil Properties of the Southeastern Forests of the United States: Sorption Behavior of Polar and Nonpolar Compounds.” 2020. Masters Thesis, Clemson University. Accessed March 02, 2021. https://tigerprints.clemson.edu/all_theses/3425.

MLA Handbook (7^th Edition):

Neuendorf, Morgan. “Prescribed Fire-Induced Changes in Soil Properties of the Southeastern Forests of the United States: Sorption Behavior of Polar and Nonpolar Compounds.” 2020. Web. 02 Mar 2021.

Vancouver:

Neuendorf M. Prescribed Fire-Induced Changes in Soil Properties of the Southeastern Forests of the United States: Sorption Behavior of Polar and Nonpolar Compounds. [Internet] [Masters thesis]. Clemson University; 2020. [cited 2021 Mar 02]. Available from: https://tigerprints.clemson.edu/all_theses/3425.

Council of Science Editors:

Neuendorf M. Prescribed Fire-Induced Changes in Soil Properties of the Southeastern Forests of the United States: Sorption Behavior of Polar and Nonpolar Compounds. [Masters Thesis]. Clemson University; 2020. Available from: https://tigerprints.clemson.edu/all_theses/3425

University of Saskatchewan

8. Karoyo, Abdalla. Structural studies of supramolecular host-guest systems.

Degree: 2015, University of Saskatchewan

URL: http://hdl.handle.net/10388/ETD-2015-05-1835

► Abstract This research work details a systematic study of the structure and function of supramolecular host-guest systems. Host-guest inclusion complexes were formed between β-Cyclodextrin (β-CD)… (more)

▼ Abstract This research work details a systematic study of the structure and function of supramolecular host-guest systems. Host-guest inclusion complexes were formed between β-Cyclodextrin (β-CD) and its copolymers (as hosts), with several types of guest molecules both in aqueous solution and the solid state. The research is divided into two themes; (1) structural characterization and dynamic properties of the inclusion compounds of β-CD with various guest systems in aqueous solution and the solid phase, and (2) heterogeneous adsorption and structural studies of β-CD based copolymers with various guest systems in aqueous solutions. The guest systems include alkyl and perfluoroalkyl carboxylates, perfluoroalkyl sulfonate, and p-nitrophenol (PNP) at variable experimental conditions. In the first theme (chapter 2-5), host-guest complexes in the solid state were prepared using dissolution and slow cool methods at variable host/guest mole ratios (i.e., 1:1 and 2:1). The complexes were further characterized using 19F/13C DP/MAS and CP/MAS solid-state NMR spectroscopy. The solution state complexes were prepared in D2O for structural characterization using 1H/19F NMR spectroscopy. The NMR studies were complemented using FT-IR, thermal analyses (DSC, and TGA), and powder X-ray diffraction (PXRD). Evidence for the formation of host-guest inclusion compounds (ICs) was provided using CP/MAS solids NMR spectroscopy and complexation-induced chemical shift (CIS) values of 1H/19F nuclei in aqueous solution. The β-CD/PFC ICs displayed variable guest geometry and hydration states as determined by the host-guest stoichiometry and the conformation of the guest. PFOA and SPFO form 1:1 and 2:1 ICs with β-CD, wherein the guest adopts a range of gauche and trans conformations, respectively. 1:1 host-guest complexes were concluded for short perfluorocarbon chains (i.e., PFBA) where the gauche conformation of the PFC guest in the bound state was favoured. In the second theme (chapters 6–8), β-CD based copolymers were used as host materials. The structural characterization of a soluble poly-CD material (known as HDI-1) revealed that the solution behaviour of such polymeric hosts are sensitive to the presence of guest compounds such as p-nitrophenol (PNP) (i.e. chemo-responsive), as well as temperature variations (i.e. thermo-responsive). The host-guest chemistry of the soluble poly-CD material, as studied by 2-D solution NMR and induced circular dichroism (ICD) spectroscopy, indicates that PNP was bound within the cavity sites of β-CD and the interstitial domains of the copolymer (cf. Scheme 1.6 and chapter 6). The observed responsive nature of such polymeric host materials to temperature variation and chemical potential resembles behaviour characteristic of ‘smart materials’. Herein, ‘smart materials’ refer to systems which are responsive to external stimuli (e.g. temperature and chemical). The adsorption properties of the soluble (HDI-1) and insoluble (HDI-3 and -6) poly-CD adsorbents with octyl and perfluorooctyl carboxylate and… Advisors/Committee Members: Wilson, Lee D., Hazendonk, Paul, Reid, Steven, Bowles, Richard, Dmitriev, Oleig.

Subjects/Keywords: Cyclodextrin; host-guest complex; sorption

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APA (6^th Edition):

Karoyo, A. (2015). Structural studies of supramolecular host-guest systems. (Thesis). University of Saskatchewan. Retrieved from http://hdl.handle.net/10388/ETD-2015-05-1835

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):

Karoyo, Abdalla. “Structural studies of supramolecular host-guest systems.” 2015. Thesis, University of Saskatchewan. Accessed March 02, 2021. http://hdl.handle.net/10388/ETD-2015-05-1835.

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

MLA Handbook (7^th Edition):

Karoyo, Abdalla. “Structural studies of supramolecular host-guest systems.” 2015. Web. 02 Mar 2021.

Vancouver:

Karoyo A. Structural studies of supramolecular host-guest systems. [Internet] [Thesis]. University of Saskatchewan; 2015. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/10388/ETD-2015-05-1835.

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

Council of Science Editors:

Karoyo A. Structural studies of supramolecular host-guest systems. [Thesis]. University of Saskatchewan; 2015. Available from: http://hdl.handle.net/10388/ETD-2015-05-1835

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

Texas A&M University

9. Roberts, Kimberly Ann. The sorption of thorium, protacintium and plutonium onto silica particles in the presence of a colloidal third phase.

Degree: PhD, Oceanography, 2009, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2798

► The fate of actinides in the environment is of interest for a several reasons. In oceanic surface waters actinides such as thorium and protactinium, and… (more)

▼ The fate of actinides in the environment is of interest for a several reasons. In oceanic surface waters actinides such as thorium and protactinium, and in particular their ratio, are used as tracers of processes such as boundary scavenging and paleocirculation. Thorium is also used to estimate residence times and particle and colloid fluxes from the euphotic zone, which is useful in global carbon budgets used to assess effects of global warming. Terrestrially, contaminated areas in need of remediation, such as former nuclear weapons production facilities, remain as repositories for no longer needed actinide stockpiles or waste by-products such as plutonium. All three of these actinides: thorium, protactinium, and plutonium are known to be particle-reactive but the extent to which they sorb to immobile particles and mobile colloids can vary with environmental conditions. Understanding controls on adsorption is important in understanding uses and any limitations of these radioactive tracers caused by colloids. Often laboratory studies to understand actinide behavior are conducted at concentrations (micro- to millimolar), which are orders of magnitude higher than they are found in the environment (femto- to picomolar). Colloids, a size class of particles operationally defined as 1 nm to 1 µm in size, are ubiquitous in aquatic systems. The effect colloids have on actinide particle association, i.e. competitive or enhancing, can have a profound influence on the ultimate behavior of the actinide. The overall aim of this study is to assess sorption of thorium, protactinium and plutonium onto silica particles as a proxy for inorganic particles found in surface or ocean waters. In addition to the binary system of actinide/silica, the ternary system actinide/ organic colloid/ silica were also carried out to determine the affect of the organic colloid has on particle association. In particular, extracellular polymeric substances (EPS) extracted from laboratory grown bacteria and phytoplankton cultures were utilized as they too are ubiquitous in aquatic systems and have shown to strongly complex actinide ions, with EPS involved in oceanic scavenging of Th, as well as immobilization/mobilization of Pu in contaminated areas on land. Advisors/Committee Members: Santschi, Peter H (advisor), Amon, Rainer (committee member), Cifuentes, Luis (committee member), Herbert, Bruce (committee member), Honeyman, Bruce D. (committee member).

Subjects/Keywords: actinide; sorption

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APA (6^th Edition):

Roberts, K. A. (2009). The sorption of thorium, protacintium and plutonium onto silica particles in the presence of a colloidal third phase. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2798

Chicago Manual of Style (16^th Edition):

Roberts, Kimberly Ann. “The sorption of thorium, protacintium and plutonium onto silica particles in the presence of a colloidal third phase.” 2009. Doctoral Dissertation, Texas A&M University. Accessed March 02, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2798.

MLA Handbook (7^th Edition):

Roberts, Kimberly Ann. “The sorption of thorium, protacintium and plutonium onto silica particles in the presence of a colloidal third phase.” 2009. Web. 02 Mar 2021.

Vancouver:

Roberts KA. The sorption of thorium, protacintium and plutonium onto silica particles in the presence of a colloidal third phase. [Internet] [Doctoral dissertation]. Texas A&M University; 2009. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2798.

Council of Science Editors:

Roberts KA. The sorption of thorium, protacintium and plutonium onto silica particles in the presence of a colloidal third phase. [Doctoral Dissertation]. Texas A&M University; 2009. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2798

Penn State University

10. Woodward, Emily Elizabeth. Optimization of estrogen analyses and quantification of environmental samples from Pennsylvania water systems.

Degree: 2016, Penn State University

URL: https://submit-etda.libraries.psu.edu/catalog/27604

► The increase in the presence of pharmaceuticals and endocrine disrupting hormones (EDCs) in the environment has had a direct impact on aquatic organisms in the… (more)

▼ The increase in the presence of pharmaceuticals and endocrine disrupting hormones (EDCs) in the environment has had a direct impact on aquatic organisms in the environment. Estrogen hormones, one class of EDCs, have been quantified in natural soil and water systems at concentrations as low as parts per trillion (ng L-1). The presence of three estrogen compounds in particular, estrone (E1), 17β-estradiol (E2), and 17α-ethynylestradiol (EE2), have been linked to human and animal waste disposal methods including land application of manure, wastewater irrigation, leaking septic systems, and direct stream discharge of wastewater effluent. To better understand estrogen behavior in the environment, numerous laboratory studies have focused on estrogen interactions with solid and solution matrices. The goals of this dissertation were to (1) determine an optimal estrogen extraction solvent that yielded the largest E1, E2, and EE2 recovery percentages, (2) optimize separation of ten estrogen and estrogenic compounds using different stationary and mobile phase combinations and high performance liquid chromatography (HPLC), (3) characterize E1, E2, and EE2 sorption in soils varying in organic carbon content and in sorption systems where pure water was used to equilibrate soils versus effluent, and (4) evaluate the possible presence of E1, E2, and EE2 in two different geographic regions within Pennsylvania: the Sinnemahoning Creek Watershed and the Penn State Living Filter Wastewater Irrigation Site For the first objective, four organic solvents and three solid phase extraction (SPE) loading ratios were evaluated in order to determine an optimal method to extract estrogens from an agricultural soil (1.09 %TOC). Solvents used to extract the soil included methanol (MeOH), dichloromethane (DCM), ethyl acetate (EA) and 50:50 MeOH:DCM. The three SPE loading ratios tested were 0:100, 5:95, and 10:90 MeOH:water. This study also tested different soil sterilization methods to see if sterilization had any effect on estrogen recoveries from soil: sodium azide (NaN3) at varying concentrations (100, 250 and 350 mg L-1) and autoclaving. Extraction results indicated that either a MeOH extraction combined with an SPE procedure that uses a 10:90 MeOH:water loading ratio or a DCM extraction would be the optimal method. These methods yielded extraction recoveries ranging from 25.76 to 39.54%. Results from the microbial inhibition study indicated that out of the two inhibition methods tested, autoclaving the soil is the optimal soil sterilization method; autoclaving yielded the highest estrogen recoveries. For the second objective, standard solutions containing ten estrogenic compounds were separated using six different stationary phase and mobile phase combinations. Three stationary phases were evaluated, C18, biphenyl, and RP-Amide, and two mobile phase organic modifiers were evaluated, ACN and MeOH. Results indicated that the combination of C18 and ACN provided the greatest separation. When C18 and ACN were used to analyze the combined… Advisors/Committee Members: John Earl Watson, Dissertation Advisor/Co-Advisor, Patrick Joseph Drohan, Committee Member, Herschel Adams Elliott, Committee Member, Franklin Lewis Dorman Jr., Committee Member, Dr Clinton Williams, Special Member.

Subjects/Keywords: Estrogen Hormones; Soils; Effluent; Sorption

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APA (6^th Edition):

Woodward, E. E. (2016). Optimization of estrogen analyses and quantification of environmental samples from Pennsylvania water systems. (Thesis). Penn State University. Retrieved from https://submit-etda.libraries.psu.edu/catalog/27604

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):

Woodward, Emily Elizabeth. “Optimization of estrogen analyses and quantification of environmental samples from Pennsylvania water systems.” 2016. Thesis, Penn State University. Accessed March 02, 2021. https://submit-etda.libraries.psu.edu/catalog/27604.

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

MLA Handbook (7^th Edition):

Woodward, Emily Elizabeth. “Optimization of estrogen analyses and quantification of environmental samples from Pennsylvania water systems.” 2016. Web. 02 Mar 2021.

Vancouver:

Woodward EE. Optimization of estrogen analyses and quantification of environmental samples from Pennsylvania water systems. [Internet] [Thesis]. Penn State University; 2016. [cited 2021 Mar 02]. Available from: https://submit-etda.libraries.psu.edu/catalog/27604.

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

Council of Science Editors:

Woodward EE. Optimization of estrogen analyses and quantification of environmental samples from Pennsylvania water systems. [Thesis]. Penn State University; 2016. Available from: https://submit-etda.libraries.psu.edu/catalog/27604

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

University of Ottawa

11. Zhu, Ying. Sorption of Microconstituents onto Primary and Activated Sludge to which Alum Has Been Added .

Degree: 2014, University of Ottawa

URL: http://hdl.handle.net/10393/31377

► Microconstituents (MCs) have become an emerging concern to scientists and researchers. Due to the development of analytical technology, it is now possible to study MCs… (more)

▼ Microconstituents (MCs) have become an emerging concern to scientists and researchers. Due to the development of analytical technology, it is now possible to study MCs at ηg/L to μg/L levels. Wastewater treatment plants (WWTPs) are the major point source for MCs entering the environment based on the literature. WWTPs are known to be unable to remove many MCs to a safe level. In order to fully understand the fate of MCs in WWTPs and to further improve the design of WWTPs in terms of MC removal, it is necessary to examine removal mechanisms such as sorption and biodegradation in WWTPs. Three MCs, bisphenol A (BPA), 17-α-ethinylestradiol (EE2) and triclosan (TCS), were chosen for this study. They are chemicals reported to be hydrophobic and have low vapor pressure, which makes sorption a highly potential removal mechanism. Primary sludge and activated sludge (AS) were used to perform sorption kinetics and isotherm experiments for BPA, EE2 and TCS. Primary sludge was collected from local WWTPs, and AS was generated from a lab-scale continuous flow bioreactor system maintained at solids retention times of 15, 10 and 5 d and hydraulic retention time (HRT) of 6 h. Alum was added to synthetic wastewater influent at concentrations typically used for phosphorus removal at some plants. Alum has the potential to change sludge structure and influence the sorption process. A comparison was made with AS as the adsorbent with and without alum addition to the AS to study the influence of alum on the sorption processes. The selected MCs were found to reach sorption equilibrium with primary sludge within 7 h. A pseudo second-order kinetic model was an excellent fit to describe the sorption processes of selected MCs. The solids-liquid partitioning coefficient (Kd) was determined for the three chosen MCs. The Kd values found for primary sludge and AS are very close. The Kd for MCs sorbed to AS in this study were compared with the Kd for AS without alum addition. Although alum addition showed no influence on effluent soluble chemical oxygen demand, it decreases the Kd for BPA and EE2 sorbed to AS. In contrast, a much higher Kd for TCS was observed for AS with alum addition. Judging from the R2 values, the linear sorption model is not suitable for some of the isotherms. Langmuir and Freundlich sorption isotherms were further used to fit the experimental data by applying linear regression and nonlinear regression approaches. The Freundlich isotherm was found to be the most suitable model to describe the experiment data.

Subjects/Keywords: microconstituents; alum; sorption; wastewater treatment

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APA (6^th Edition):

Zhu, Y. (2014). Sorption of Microconstituents onto Primary and Activated Sludge to which Alum Has Been Added . (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/31377

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):

Zhu, Ying. “Sorption of Microconstituents onto Primary and Activated Sludge to which Alum Has Been Added .” 2014. Thesis, University of Ottawa. Accessed March 02, 2021. http://hdl.handle.net/10393/31377.

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

MLA Handbook (7^th Edition):

Zhu, Ying. “Sorption of Microconstituents onto Primary and Activated Sludge to which Alum Has Been Added .” 2014. Web. 02 Mar 2021.

Vancouver:

Zhu Y. Sorption of Microconstituents onto Primary and Activated Sludge to which Alum Has Been Added . [Internet] [Thesis]. University of Ottawa; 2014. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/10393/31377.

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

Council of Science Editors:

Zhu Y. Sorption of Microconstituents onto Primary and Activated Sludge to which Alum Has Been Added . [Thesis]. University of Ottawa; 2014. Available from: http://hdl.handle.net/10393/31377

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

University of Manitoba

12. Caron, Emmanuelle. Fate of estrogenic compounds in agricultural soils and development of an immunoassay for their environmental detection.

Degree: Soil Science, 2011, University of Manitoba

URL: http://hdl.handle.net/1993/4730

► Estrogens produced by livestock can be released into soils when their manure is spread onto agricultural land. This is the first study to determine the… (more)

Subjects/Keywords: estrogen; immunoassay; sorption; mineralization

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APA (6^th Edition):

Caron, E. (2011). Fate of estrogenic compounds in agricultural soils and development of an immunoassay for their environmental detection. (Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/4730

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):

Caron, Emmanuelle. “Fate of estrogenic compounds in agricultural soils and development of an immunoassay for their environmental detection.” 2011. Thesis, University of Manitoba. Accessed March 02, 2021. http://hdl.handle.net/1993/4730.

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

MLA Handbook (7^th Edition):

Caron, Emmanuelle. “Fate of estrogenic compounds in agricultural soils and development of an immunoassay for their environmental detection.” 2011. Web. 02 Mar 2021.

Vancouver:

Caron E. Fate of estrogenic compounds in agricultural soils and development of an immunoassay for their environmental detection. [Internet] [Thesis]. University of Manitoba; 2011. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/1993/4730.

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

Council of Science Editors:

Caron E. Fate of estrogenic compounds in agricultural soils and development of an immunoassay for their environmental detection. [Thesis]. University of Manitoba; 2011. Available from: http://hdl.handle.net/1993/4730

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

KTH

13. Hadialhejazi, Golshid. Assessment of vanadium sorption by different soils.

Degree: Land and Water Resources Engineering (moved 20130630), 2012, KTH

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171798

► Vanadium is a white bright metal that belongs to group 5 in the periodic table of elements. It can exist in different oxidation states… (more)

▼ Vanadium is a white bright metal that belongs to group 5 in the periodic table of elements. It can exist in different oxidation states from -2 to +5 although the forms can be found naturally in the environment are (III), (IV) and (V). As vanadium is toxic at high concentrations, and as vanadium is a common contaminant from e.g., steel slags, more detailed knowledge on the environmental behavior of this metal is required. One important property is its sorption to soils, as this will determine the bioavailability and the risk of leaching from soils. In surface soils vanadium(V) is commonly the predominating redox species. Therefore the purpose of this study was to determine vanadium(V) sorption in 7 different soils in order to investigate the factors determining vanadium(V) sorption and to estimate the capacity of the soils to bind vanadium. From laboratory adsorption experiments, vanadium sorption has been studied as a function of pH, vanadium(V) concentration, and phosphorus status. The adsorbed vanadium(V) of investigated soils was compared on the basis of the Freundlich parameters m and log <em>K_f</em>. The clay content of the soil and the content of oxalate soluble iron and aluminum were two important factors for the vanadium(V) sorption behavior. The higher the values of these soil properties, the stronger was vanadium(V) sorption. Among the soils investigated here the sorption strength was highest for the Kungängen A₃ soil and then decreased in the following order Säby, Kungsängen D₃, Pustnäs, Termunck, Guadalajara and Zwijnaarde. It is notable that the three soils with the strongest vanadium(V) sorption were clay soils, whereas the other four were sandy or silty soils. The pH dependence of vanadium sorption was also determined. The results show that the percentage sorbed vanadium(V) increases with decreasing pH. This is due probably to the anion properties of vanadium(V) (i.e. vanadate) in combination with increased positive surface charge on the soil colloids at lower pH. Moreover there is a competition between phosphate and vanadium(V) for sorption sites, which will cause less vanadium(V) sorption in soils. Therefore both the pH value and the phosphorus status are two additional factors that influence the vanadium sorption properties of soils.

Subjects/Keywords: Vanadium; soil; Freundlich model; sorption

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APA (6^th Edition):

Hadialhejazi, G. (2012). Assessment of vanadium sorption by different soils. (Thesis). KTH. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171798

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):

Hadialhejazi, Golshid. “Assessment of vanadium sorption by different soils.” 2012. Thesis, KTH. Accessed March 02, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171798.

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

MLA Handbook (7^th Edition):

Hadialhejazi, Golshid. “Assessment of vanadium sorption by different soils.” 2012. Web. 02 Mar 2021.

Vancouver:

Hadialhejazi G. Assessment of vanadium sorption by different soils. [Internet] [Thesis]. KTH; 2012. [cited 2021 Mar 02]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171798.

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

Council of Science Editors:

Hadialhejazi G. Assessment of vanadium sorption by different soils. [Thesis]. KTH; 2012. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-171798

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

University of Notre Dame

14. Luke R. Sadergaski. The Behavior of Uranyl Peroxide Nanoclusters at the Mineral-Water Interface</h1>.

Degree: Civil and Environmental Engineering and Earth Sciences, 2019, University of Notre Dame

URL: https://curate.nd.edu/show/5712m616c6r

► This dissertation pioneers the macroscopic characterization of uranyl peroxide nanocluster interactions with different mineral surfaces. Batch sorption experiments were conducted in order to determine… (more)

Subjects/Keywords: uranyl peroxide nanocluster; sorption; mineral

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APA (6^th Edition):

Sadergaski, L. R. (2019). The Behavior of Uranyl Peroxide Nanoclusters at the Mineral-Water Interface</h1>. (Thesis). University of Notre Dame. Retrieved from https://curate.nd.edu/show/5712m616c6r

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):

Sadergaski, Luke R.. “The Behavior of Uranyl Peroxide Nanoclusters at the Mineral-Water Interface</h1>.” 2019. Thesis, University of Notre Dame. Accessed March 02, 2021. https://curate.nd.edu/show/5712m616c6r.

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

MLA Handbook (7^th Edition):

Sadergaski, Luke R.. “The Behavior of Uranyl Peroxide Nanoclusters at the Mineral-Water Interface</h1>.” 2019. Web. 02 Mar 2021.

Vancouver:

Sadergaski LR. The Behavior of Uranyl Peroxide Nanoclusters at the Mineral-Water Interface</h1>. [Internet] [Thesis]. University of Notre Dame; 2019. [cited 2021 Mar 02]. Available from: https://curate.nd.edu/show/5712m616c6r.

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

Council of Science Editors:

Sadergaski LR. The Behavior of Uranyl Peroxide Nanoclusters at the Mineral-Water Interface</h1>. [Thesis]. University of Notre Dame; 2019. Available from: https://curate.nd.edu/show/5712m616c6r

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

University of Tasmania

15. Hasan, CK. Development, characterisation, and application of a novel polydimethylsiloxane-microdiamond composite sorbent for selective extraction and preconcentration.

Degree: 2020, University of Tasmania

URL: https://eprints.utas.edu.au/34974/1/Hasan_whole_thesis.pdf ; Hasan, CK ORCID: 0000-0002-9638-0559 <https://orcid.org/0000-0002-9638-0559> 2020 , 'Development, characterisation, and application of a novel polydimethylsiloxane-microdiamond composite sorbent for selective extraction and preconcentration', PhD thesis, University of Tasmania.

► The thesis encompasses the development and characterisation of a novel polydimethylsiloxane-microdiamond (PDMS-μDiamond) composite sorbent for application within ‘in-sample extraction’ prior to either liquid desorption (LD)… (more)

▼ The thesis encompasses the development and characterisation of a novel polydimethylsiloxane-microdiamond (PDMS-μDiamond) composite sorbent for application within ‘in-sample extraction’ prior to either liquid desorption (LD) or thermal desorption (TD) and gas chromatography (GC) analysis. Chapter 1 introduces a review of the novel coatings (other than PDMS) developed over the last five years for stir bar sorptive extraction (SBSE). The review focuses on the selectivity of each, as well as the physical, chemical and thermal stabilities of these coatings, which are based on a range of carbon materials, functional polymers, metal organic frameworks, and various nanoparticles. The majority of these materials exhibit high thermal and chemical stability, along with unique selectivity profiles to extend the potential application of SBSE. The review also identifies how the extractive stir bars (SBs) modified with these coatings have been used to develop methods based more on LD-high performance liquid chromatography (HPLC) than on the TD-GC. Therefore, highlighting how future research should focus on how these novel coatings can be applied with TD-GC. Chapter 2 describes several systematic experiments involving preparation, characterisation, and final application of the non-porous and porous PDMS-μDiamond composite rods as sorptive phases for extracting model solutes from wine samples, followed by their quantitation using LD-GC-FID. Introducing ~60 wt.% of μDiamond particles (2-4 μm) within the PDMS matrix gave several advantages: (1) significant increase in density (up to ~170% increase compared to PDMS) while maintaining physical integrity, (2) significant improvement in mechanical stability, (3) increased thermal stability up to 450-500 ºC, and (4) significantly higher thermal conductivity (~108% higher than that of the PDMS). The composite sorptive rods were applied in the development of a robust PDMS-μDiamond-LD-GC-FID method for the analysis of the model solutes (R(²)>0.98, intra-day precision RSD ~1.3-19.4%, accuracy in terms of % recovery ~87->100% RSD 2.1-12.5%). The porous rods showed improved % recovery for most of the test solutes (>10-20%) compared to a commercial PDMS phase under identical analytical conditions. The method’s limit of detection (LOD) (0.6-27.3 μg L(^-1)) further confirmed its robustness and its applicability for the trace chemical analysis. In the Chapter 3, the development of a rapid and a solvent-free method for removing siloxane oligomers from the PDMS-μDiamond composite rods is reported. The method involved post-cure thermal conditioning of the composite rods within a GC liner at 350 °C for 12 h under a helium flow of 2.5 mL min(^-1). Significant reduction of siloxane oligomers, as seen in the chromatograms (obtained by placing the rods within the GC liner at 200-350 ºC), compared to the control chromatograms confirmed the effectiveness of the method, which was ~8 times faster than an alternative solvent purification method (washing the rods in toluene for 72 h, followed by…

Subjects/Keywords: Composites; microdiamond; polydimethylsiloxane; sorption

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APA (6^th Edition):

Hasan, C. (2020). Development, characterisation, and application of a novel polydimethylsiloxane-microdiamond composite sorbent for selective extraction and preconcentration. (Thesis). University of Tasmania. Retrieved from https://eprints.utas.edu.au/34974/1/Hasan_whole_thesis.pdf ; Hasan, CK ORCID: 0000-0002-9638-0559 <https://orcid.org/0000-0002-9638-0559> 2020 , 'Development, characterisation, and application of a novel polydimethylsiloxane-microdiamond composite sorbent for selective extraction and preconcentration', PhD thesis, University of Tasmania.

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):

Hasan, CK. “Development, characterisation, and application of a novel polydimethylsiloxane-microdiamond composite sorbent for selective extraction and preconcentration.” 2020. Thesis, University of Tasmania. Accessed March 02, 2021. https://eprints.utas.edu.au/34974/1/Hasan_whole_thesis.pdf ; Hasan, CK ORCID: 0000-0002-9638-0559 <https://orcid.org/0000-0002-9638-0559> 2020 , 'Development, characterisation, and application of a novel polydimethylsiloxane-microdiamond composite sorbent for selective extraction and preconcentration', PhD thesis, University of Tasmania..

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

MLA Handbook (7^th Edition):

Hasan, CK. “Development, characterisation, and application of a novel polydimethylsiloxane-microdiamond composite sorbent for selective extraction and preconcentration.” 2020. Web. 02 Mar 2021.

Vancouver:

Hasan C. Development, characterisation, and application of a novel polydimethylsiloxane-microdiamond composite sorbent for selective extraction and preconcentration. [Internet] [Thesis]. University of Tasmania; 2020. [cited 2021 Mar 02]. Available from: https://eprints.utas.edu.au/34974/1/Hasan_whole_thesis.pdf ; Hasan, CK ORCID: 0000-0002-9638-0559 <https://orcid.org/0000-0002-9638-0559> 2020 , 'Development, characterisation, and application of a novel polydimethylsiloxane-microdiamond composite sorbent for selective extraction and preconcentration', PhD thesis, University of Tasmania..

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

Council of Science Editors:

Hasan C. Development, characterisation, and application of a novel polydimethylsiloxane-microdiamond composite sorbent for selective extraction and preconcentration. [Thesis]. University of Tasmania; 2020. Available from: https://eprints.utas.edu.au/34974/1/Hasan_whole_thesis.pdf ; Hasan, CK ORCID: 0000-0002-9638-0559 <https://orcid.org/0000-0002-9638-0559> 2020 , 'Development, characterisation, and application of a novel polydimethylsiloxane-microdiamond composite sorbent for selective extraction and preconcentration', PhD thesis, University of Tasmania.

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

Colorado School of Mines

16. Dangelmayr, Martin A. Biogeochemical controls of uranium remediation and transport.

Degree: PhD, Civil and Environmental Engineering, 2018, Colorado School of Mines

URL: http://hdl.handle.net/11124/172151

► In the U.S. almost 140 sites have been contaminated by uranium mining and milling operations or by the storage of radioactive materials. In-situ recovery (ISR)… (more)

▼ In the U.S. almost 140 sites have been contaminated by uranium mining and milling operations or by the storage of radioactive materials. In-situ recovery (ISR) facilities still face challenges restoring water to pre-mining conditions and leave behind elevated uranium concentrations. Bioremediation and reactive transport modeling are potential tools to mitigate the impact of uranium contamination on human and environmental health, through their ability to immobilize uranium and assess the effectiveness of natural uranium attenuation. This project investigated biogeochemical aspects of both active and natural remediation of uranium contaminated subsurface for two field sites: The Smith Ranch Highland (SRH) site in WY, and the Rifle, Integrated Field Research Challenge (IFRC) site in CO. Our project objectives were to study the transformation of organic substrate during biostimulation and assess uranium retardation due to sorption with sediments taken from an ISR site. This thesis presents two research projects that address the remediation and risk assessment of uranium contaminated sites. The first project evaluated the impact of added organic carbon on the long-term biogeochemical attenuation of uranium in the subsurface of a former mill tailings site. Fluorescence and specific ultraviolet absorption (SUVA) analyses were used together with dissolved organic carbon (DOC) measurements to track organic carbon dynamics during and post-biostimulation of the 2011 Rifle IFRC experiment. An electron mass balance was performed on well CD01 to determine if any carbon sinks were unaccounted for. DOC values increased to 1.76 mM-C during biostimulation, and 3.18 mM-C post-biostimulation over background DOC values of 0.3-0.4 mM-C. Elevated DOC levels persisted 90 days after acetate injections ceased. The electron mass balance revealed that assumed electron acceptors would not account for the total amount of acetate consumed. Fluorescence spectra showed an increase in signals associated with soluble microbial products (SMP), during biostimulation, which disappeared post-biostimulation despite an increase in DOC. SUVA analyses, indicated that DOC present post-biostimulation is less aromatic in nature, compared to background DOC. Our results suggest that microbes convert injected acetate into a carbon sink that may be available to sustain iron reduction post-stimulation The second project consisted of two sets of column experiments and attempted to evaluate the impact of alkalinity and pH on the sorption of uranium in sediments from an ISR site. The ability of thermodynamic models to predict uranium behavior under conditions relevant to ISR restoration sites was also tested. Sediments at three different depths from a monitoring well at the SRH site were used in nine column studies and six batch experiments to study the sorption capacity of SRH sediments and estimate uncertainties associated with fitted parameters. Sediments were characterized by X-Ray Diffraction (XRD) and X-Ray Fluorescence (XRF) for dominant mineralogy and… Advisors/Committee Members: Figueroa, Linda A. (advisor), Stone, James J. (advisor), Sharp, Jonathan O. (committee member), Ranville, James F. (committee member), Bellona, Christopher (committee member).

Subjects/Keywords: groundwater; uranium; sorption; bioremediation

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APA (6^th Edition):

Dangelmayr, M. A. (2018). Biogeochemical controls of uranium remediation and transport. (Doctoral Dissertation). Colorado School of Mines. Retrieved from http://hdl.handle.net/11124/172151

Chicago Manual of Style (16^th Edition):

Dangelmayr, Martin A. “Biogeochemical controls of uranium remediation and transport.” 2018. Doctoral Dissertation, Colorado School of Mines. Accessed March 02, 2021. http://hdl.handle.net/11124/172151.

MLA Handbook (7^th Edition):

Dangelmayr, Martin A. “Biogeochemical controls of uranium remediation and transport.” 2018. Web. 02 Mar 2021.

Vancouver:

Dangelmayr MA. Biogeochemical controls of uranium remediation and transport. [Internet] [Doctoral dissertation]. Colorado School of Mines; 2018. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/11124/172151.

Council of Science Editors:

Dangelmayr MA. Biogeochemical controls of uranium remediation and transport. [Doctoral Dissertation]. Colorado School of Mines; 2018. Available from: http://hdl.handle.net/11124/172151

17. Lee, BooYoung. Removal of antibiotics from contaminated waters using natural zeolite.

Degree: MS(M.S.), Earth and Atmospheric Sciences, 2012, City University of New York

URL: https://academicworks.cuny.edu/cc_etds_theses/91

► The occurrence of residual antibiotics in the environment has been a worldwide issue, and there is a need to develop methods for antibiotics removal from… (more)

Subjects/Keywords: Antibiotics; Sorption; Natural Zeolilte

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APA (6^th Edition):

Lee, B. (2012). Removal of antibiotics from contaminated waters using natural zeolite. (Thesis). City University of New York. Retrieved from https://academicworks.cuny.edu/cc_etds_theses/91

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):

Lee, BooYoung. “Removal of antibiotics from contaminated waters using natural zeolite.” 2012. Thesis, City University of New York. Accessed March 02, 2021. https://academicworks.cuny.edu/cc_etds_theses/91.

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

MLA Handbook (7^th Edition):

Lee, BooYoung. “Removal of antibiotics from contaminated waters using natural zeolite.” 2012. Web. 02 Mar 2021.

Vancouver:

Lee B. Removal of antibiotics from contaminated waters using natural zeolite. [Internet] [Thesis]. City University of New York; 2012. [cited 2021 Mar 02]. Available from: https://academicworks.cuny.edu/cc_etds_theses/91.

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

Council of Science Editors:

Lee B. Removal of antibiotics from contaminated waters using natural zeolite. [Thesis]. City University of New York; 2012. Available from: https://academicworks.cuny.edu/cc_etds_theses/91

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

University of Guelph

18. Safieh, Peter. Use of Lecithin-Based Emulsion Gels to Absorb Toluene and Hexane Spills from Surface Waters.

Degree: Master of Applied Science, School of Engineering, 2019, University of Guelph

URL: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/16924

► Natural sorbents for the removal of free toluene, hexane, and toluene/hexane mixtures from surface water were made using lecithin, food grade oils (canola, sunflower, safflower… (more)

Subjects/Keywords: Emulsion; Lecithin; Sorption; Sorbents; Natural

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APA (6^th Edition):

Safieh, P. (2019). Use of Lecithin-Based Emulsion Gels to Absorb Toluene and Hexane Spills from Surface Waters. (Masters Thesis). University of Guelph. Retrieved from https://atrium.lib.uoguelph.ca/xmlui/handle/10214/16924

Chicago Manual of Style (16^th Edition):

Safieh, Peter. “Use of Lecithin-Based Emulsion Gels to Absorb Toluene and Hexane Spills from Surface Waters.” 2019. Masters Thesis, University of Guelph. Accessed March 02, 2021. https://atrium.lib.uoguelph.ca/xmlui/handle/10214/16924.

MLA Handbook (7^th Edition):

Safieh, Peter. “Use of Lecithin-Based Emulsion Gels to Absorb Toluene and Hexane Spills from Surface Waters.” 2019. Web. 02 Mar 2021.

Vancouver:

Safieh P. Use of Lecithin-Based Emulsion Gels to Absorb Toluene and Hexane Spills from Surface Waters. [Internet] [Masters thesis]. University of Guelph; 2019. [cited 2021 Mar 02]. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/16924.

Council of Science Editors:

Safieh P. Use of Lecithin-Based Emulsion Gels to Absorb Toluene and Hexane Spills from Surface Waters. [Masters Thesis]. University of Guelph; 2019. Available from: https://atrium.lib.uoguelph.ca/xmlui/handle/10214/16924

University of Minnesota

19. Pawlowski, Ethan. Assessment of Lead and Beryllium Sorption To Exposed Stream Channel Sediment Under Varying Freshwater Channel Conditions.

Degree: MS, Natural Resources Science and Management, 2019, University of Minnesota

URL: http://hdl.handle.net/11299/216063

► Purpose: Beryllium (Be) and lead (Pb) sorption is important to the utility of the radioisotopes of these elements for sediment fingerprinting. I examined the sorption… (more)

▼ Purpose: Beryllium (Be) and lead (Pb) sorption is important to the utility of the radioisotopes of these elements for sediment fingerprinting. I examined the sorption of Be and Pb to exposed fluvial sediment under varying chemical conditions representative of freshwater streams draining two distinct Critical Zone environments in the eastern United States: the mid-Atlantic piedmont and heavily glaciated Great Lakes region. Materials and Methods: Batch experiments were completed using well-characterized in-stream deposit sediments collected from these two systems and varying solutions to reflect background and elevated levels of iron oxide in the form of goethite across times ranging from 0.25 to 360 h. The mid-Atlantic piedmont sediment had further treatments testing dissolved organic carbon (up to 11.86 mg L-1) and increased sediment to solution ratio (up to 8000 mg: 1 L) effects on Pb and Be sorption. Results and Discussion: Beryllium partition coefficients (Kd) ranged from a log Kd of 1.46 to 3.48 L kg-1 and Pb ranged from 0 to 5.03 L kg-1 across all treatments displaying several noticeable patterns. Two-stage sorption was observed such that sorption increased over time across all treatments and substrates. Goethite additions either enhanced or reduced sorption relative to the base treatment depending on the original sediment and mixing time. Lead sorption with the addition of 100 mg of goethite increased during shorter mixing times before being surpassed by the base treatment at longer mixing times for both the mid-Atlantic piedmont and glaciated Great Lakes sediment. Beryllium sorption was increased with the mid-Atlantic piedmont sediment whereas it was primarily decreased with the glaciated Great Lakes sediment. The 1 mg of goethite generally showed equal to or slightly enhanced sorption relative to the base treatment of both Pb and Be with the exception of Pb sorption to the Great Lakes sediment. The highest DOC concentration that I tested (11.86 mg L-1) retained a greater amount of Be and Pb in solution compared to other treatments after 360 h. Increasing the sediment to solution ratio showed decreased partition coefficients across all analogous times for Be compared to the base treatment whereas Pb sorption surpassed the unaltered treatment after 24 h. Conclusions: It is not recommended to use either 7Be or 210Pb in fluvial systems with high background concentrations of DOC because the DOC was shown to inhibit sorption to sediment surfaces and it could produce erroneous results in sediment fingerprinting studies unless that inhibition or loss is accounted for. The goethite treatments produced mixed results and further research is needed to parse out conditions that enhance or inhibit the sorption of fallout radionuclides in the presence of stream sediments with varying amounts of organic matter occlusion of surface binding sites. Increased sediment to solution ratios increased sorption of Pb suggesting that Pb would be a conservative tracer in fluvial systems with high sediment delivery. These results…

Subjects/Keywords: beryllium; lead; sediment; sorption

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APA (6^th Edition):

Pawlowski, E. (2019). Assessment of Lead and Beryllium Sorption To Exposed Stream Channel Sediment Under Varying Freshwater Channel Conditions. (Masters Thesis). University of Minnesota. Retrieved from http://hdl.handle.net/11299/216063

Chicago Manual of Style (16^th Edition):

Pawlowski, Ethan. “Assessment of Lead and Beryllium Sorption To Exposed Stream Channel Sediment Under Varying Freshwater Channel Conditions.” 2019. Masters Thesis, University of Minnesota. Accessed March 02, 2021. http://hdl.handle.net/11299/216063.

MLA Handbook (7^th Edition):

Pawlowski, Ethan. “Assessment of Lead and Beryllium Sorption To Exposed Stream Channel Sediment Under Varying Freshwater Channel Conditions.” 2019. Web. 02 Mar 2021.

Vancouver:

Pawlowski E. Assessment of Lead and Beryllium Sorption To Exposed Stream Channel Sediment Under Varying Freshwater Channel Conditions. [Internet] [Masters thesis]. University of Minnesota; 2019. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/11299/216063.

Council of Science Editors:

Pawlowski E. Assessment of Lead and Beryllium Sorption To Exposed Stream Channel Sediment Under Varying Freshwater Channel Conditions. [Masters Thesis]. University of Minnesota; 2019. Available from: http://hdl.handle.net/11299/216063

University of Adelaide

20. Knight, Emma Rae. Fate and Bioavailability of Per- and Poly-Fluorinated Substances (PFASs) in Soils.

Degree: 2020, University of Adelaide

URL: http://hdl.handle.net/2440/128232

► Per- and poly-fluorinated substances (PFASs) are a group of compounds with similar structures and have a unique set of properties which make them resistant to… (more)

▼ Per- and poly-fluorinated substances (PFASs) are a group of compounds with similar structures and have a unique set of properties which make them resistant to biodegradation, available to bioaccumulate, and potentially toxic to many organisms in the environment. Yet there is currently limited information on the fate and bioavailability of PFASs in the soil environment. The thesis investigates the sorption and bioavailability of three commonly reported perfluoroalkyl acids (PFAAs) in a wide range of soils with varying properties and determines if sorption coefficients and bioaccumulation can be predicted from soil properties and are affected by residence time in soil. Preliminary studies found that sorption of 14C-perfluoroocatanioc acid (PFOA) was considerable on common laboratory consumables, e.g. centrifuge tubes and syringe filters. In contrast to reports in the literature, sorption losses on polypropylene tubes were found to be significantly higher than on glass tubes. Sorption losses were also significant using syringe filter membranes. This highlights that significant errors can occur, creating analytical bias during routine laboratory procedures. Sorption (Kd) of perfluorooctane sulphonic acid (PFOS), 14C-PFOA and perfluorohexane sulphonic acid (PFHxS) was investigated in a wide range of Australian soils with varying properties. Modelling was conducted to determine if soil properties could predict sorption coefficients using two modelling strategies: multiple linear regression (MLR) using traditional laboratory chemical analyses of soils; and diffuse reflectance Fourier transform mid-infrared spectroscopy coupled to partial least squares regression (DRIFT-PLSR). The sorption coefficients for all three compounds were at the lower end of the ranges previously reported, perhaps due to the low amounts of organic carbon (OC) and alkaline pH of many Australian soils. The retention of PFOA was weak in all soils, but even more so in subsoils, indicating that PFOA could easily be leached through surface- and sub-soil horizons into ground-waters. The retention of PFOS and PFHxS was not affected by soil depth. The sorption of all three PFAAs was influenced by their structural differences and different soil properties. The sorption of PFOA was positively affected by OC and silt-plus-clay content, PFOS sorption was positively correlated to OC content and negatively correlated to pH and PFHxS sorption was positively correlated to OC content, clay content and concentrations of exchangeable cations. DRIFT-PLSR modelling indicated that soils dominated with quartz and pyrophyllite minerals had a low affinity for PFOA sorption. The DRIFT-PLSR modelling of PFOS and PFHxS sorption was unreliable, likely due to the low and narrow range of Kd values found. For PFOA modelling, similar results were found between the MLR and DRIFT-PLSR modelling strategies which suggested that DRIFT-PLSR could be used as a quicker and cheaper technique to predict sorption compared to traditional laboratory analyses of soil coupled with MLR. The aging… Advisors/Committee Members: McLaughlin, Michael (advisor), Kookana, Rai (advisor), Navarro, Divina (advisor), School of Agriculture, Food and Wine (school).

Subjects/Keywords: Sorption; bioaccumulation; PFAAs; plant uptake

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APA (6^th Edition):

Knight, E. R. (2020). Fate and Bioavailability of Per- and Poly-Fluorinated Substances (PFASs) in Soils. (Thesis). University of Adelaide. Retrieved from http://hdl.handle.net/2440/128232

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):

Knight, Emma Rae. “Fate and Bioavailability of Per- and Poly-Fluorinated Substances (PFASs) in Soils.” 2020. Thesis, University of Adelaide. Accessed March 02, 2021. http://hdl.handle.net/2440/128232.

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

MLA Handbook (7^th Edition):

Knight, Emma Rae. “Fate and Bioavailability of Per- and Poly-Fluorinated Substances (PFASs) in Soils.” 2020. Web. 02 Mar 2021.

Vancouver:

Knight ER. Fate and Bioavailability of Per- and Poly-Fluorinated Substances (PFASs) in Soils. [Internet] [Thesis]. University of Adelaide; 2020. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/2440/128232.

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

Council of Science Editors:

Knight ER. Fate and Bioavailability of Per- and Poly-Fluorinated Substances (PFASs) in Soils. [Thesis]. University of Adelaide; 2020. Available from: http://hdl.handle.net/2440/128232

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

Virginia Tech

21. Bierlein, Kevin Andrew. Modeling Manganese Sorption and Surface Oxidation During Filtration.

Degree: MS, Environmental Planning, 2012, Virginia Tech

URL: http://hdl.handle.net/10919/32164

► Soluble manganese (Mn) is a common contaminant in drinking water sources. High levels of Mn can lead to aesthetic water quality problems, necessitating removal of… (more)

▼ Soluble manganese (Mn) is a common contaminant in drinking water sources. High levels of Mn can lead to aesthetic water quality problems, necessitating removal of Mn during treatment to minimize consumer complaints. Mn may be removed during granular media filtration by the â natural greensand effect,â in which soluble Mn adsorbs to manganese oxide-coated (MnOx(s)) media and is then oxidized by chlorine, forming more manganese oxide. This research builds on a previous model developed by Merkle et al. (1997) by either neglecting the empirically determined available fraction of sorption sites (referred to as the â simpleâ model), which took into account the fact that some adsorption sites in the porous media were inaccessible, or by explicitly accounting for the transport and reaction processes within the porous structure of the MnOx(s) coating (referred to as the â mechanisticâ model). Both models were applied to experimental data and used to evaluate the oxidation rate constant, which was the only unknown parameter. An inverse relationship between the fitted reaction rate constant and chlorine concentration was observed, showing that the oxidation reaction does not depend on chlorine concentration for the experimental conditions considered. In a sensitivity analysis, the adsorption isotherm and reaction rate were found to have the greatest impact on predicted Mn removal. The simple model should prove useful for designing contactor units for manganese removal, provided its limitations are clearly understood, while the mechanistic model should be able to resolve differences in the various types of oxide coating (internal porosity, surface area and coating thickness) and will allow a more fundamental and mechanistically-consistent evaluation of the appropriate form of the oxidation rate expression. However, further research is needed to more completely characterize the adsorption and reaction mechanisms over the range of conditions commonly encountered in water treatment plants. Advisors/Committee Members: Little, John C. (committeechair), Knocke, William R. (committee member), Tobiason, John E. (committee member).

Subjects/Keywords: manganese; filtration; oxidation; sorption

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APA (6^th Edition):

Bierlein, K. A. (2012). Modeling Manganese Sorption and Surface Oxidation During Filtration. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/32164

Chicago Manual of Style (16^th Edition):

Bierlein, Kevin Andrew. “Modeling Manganese Sorption and Surface Oxidation During Filtration.” 2012. Masters Thesis, Virginia Tech. Accessed March 02, 2021. http://hdl.handle.net/10919/32164.

MLA Handbook (7^th Edition):

Bierlein, Kevin Andrew. “Modeling Manganese Sorption and Surface Oxidation During Filtration.” 2012. Web. 02 Mar 2021.

Vancouver:

Bierlein KA. Modeling Manganese Sorption and Surface Oxidation During Filtration. [Internet] [Masters thesis]. Virginia Tech; 2012. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/10919/32164.

Council of Science Editors:

Bierlein KA. Modeling Manganese Sorption and Surface Oxidation During Filtration. [Masters Thesis]. Virginia Tech; 2012. Available from: http://hdl.handle.net/10919/32164

University of Texas – Austin

22. -0131-0310. Sorption of semi-volatile organic compounds to dust and other surfaces in indoor environments.

Degree: PhD, Civil Engineering, 2018, University of Texas – Austin

URL: http://dx.doi.org/10.26153/tsw/3190

► Semi-volatile organic compounds (SVOCs) are ubiquitous in indoor environments. Because they partition strongly to dust other surfaces in the indoor environments, most SVOCs persist for… (more)

▼ Semi-volatile organic compounds (SVOCs) are ubiquitous in indoor environments. Because they partition strongly to dust other surfaces in the indoor environments, most SVOCs persist for years after the source is removed. Biomonitoring data based on blood and urine testing suggested the universal and significant human exposure to SVOCs, which may result in serious adverse health effects. However, because of the poor understanding of their transfer process from sources to indoor surfaces, significant uncertainties exist for the estimation of exposure to SVOCs through various pathways and effective strategies to limit such exposure remains hamstrung. The goal of this dissertation is to explicitly elucidate the sorption of important and emerging SVOCs to dust and other surfaces in the indoor environments. The specific research objectives are to 1) investigate the emission, sorption, and fate of phthalates in a residential test house; 2) characterize the direct transfer of SVOCs from sources to settled dust through systematic chamber study; and 3) measure SVOC levels in heating, ventilation, and air conditioning (HVAC) filter dust of U.S. lowincome homes and investigate their association with concentrations in settled dust, seasons, building characteristics, and childhood asthma. Strong sorption of phthalates was observed on interior surfaces, including dust, dish plates, windows, mirrors, fabric cloth, and wood, in a residential test house. In addition, when dust is in contact with the PVC floorings, equilibrium dust concentrations of phthalates are orders of magnitude higher than typical dust concentrations reported in the literature. And we found that the equilibrium concentrations of phthalates in dust can be predicted with the concentrations of phthalates within the gas layer in adjacent with the flooring materials. Finally, the results suggest that HVAC filter dust is a useful sampling media to monitor indoor SVOC concentrations with high sensitivity. When using settled dust, in addition to considering seasonal influences, it is very important to know the sampling location because the types and levels of SVOCs might be related to the local materials. Advisors/Committee Members: Xu, Ying (Assistant professor) (advisor), Corsi, Richard L. (committee member), Kinney, Kerry A. (committee member), Novoselac, Atila (committee member), Little, John C. (committee member).

Subjects/Keywords: Sorption; SVOCs; Dust; Surfaces; Indoor

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APA (6^th Edition):

-0131-0310. (2018). Sorption of semi-volatile organic compounds to dust and other surfaces in indoor environments. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://dx.doi.org/10.26153/tsw/3190

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Chicago Manual of Style (16^th Edition):

-0131-0310. “Sorption of semi-volatile organic compounds to dust and other surfaces in indoor environments.” 2018. Doctoral Dissertation, University of Texas – Austin. Accessed March 02, 2021. http://dx.doi.org/10.26153/tsw/3190.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

MLA Handbook (7^th Edition):

-0131-0310. “Sorption of semi-volatile organic compounds to dust and other surfaces in indoor environments.” 2018. Web. 02 Mar 2021.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Vancouver:

-0131-0310. Sorption of semi-volatile organic compounds to dust and other surfaces in indoor environments. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2018. [cited 2021 Mar 02]. Available from: http://dx.doi.org/10.26153/tsw/3190.

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

Council of Science Editors:

-0131-0310. Sorption of semi-volatile organic compounds to dust and other surfaces in indoor environments. [Doctoral Dissertation]. University of Texas – Austin; 2018. Available from: http://dx.doi.org/10.26153/tsw/3190

Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete

University of Vienna

23. Schönhofer, Manuel. Sorption ausgewählter organischer Modellsubstanzen an Reifenmaterialien.

Degree: 2018, University of Vienna

URL: http://othes.univie.ac.at/52715/

► Die vielfältige Verwendungsweise von Plastik, sei es als Gehäuseteile oder als Mikroplastik in Scheuermitteln führte seit den 1950er Jahren zu einem rasanten Anstieg im globalen… (more)

▼ Die vielfältige Verwendungsweise von Plastik, sei es als Gehäuseteile oder als Mikroplastik in Scheuermitteln führte seit den 1950er Jahren zu einem rasanten Anstieg im globalen Bedarf. (Mikro-) Plastik kann durch seine hohen Sorptionskapazitäten organische Substanzen aufnehmen und könnte dadurch zu einem toxikologischen Risiko werden. Zusätzlich führen die hohen Produktionszahlen und der unvorsichtige Einsatz von Plastik zu einem starken Eintrag in die Umwelt. Besonders Reifengranulat (TCR) erfreut sich als günstige Alternative zu elektrochemischen und photochemischen Methoden zur Entfernung von Schadstoffen sowie Aktivkohle als Passivsammler größter Beliebtheit und wird oft auch bewusst in der Bauindustrie als Zement-Verbundstoff und Füllmaterial für Sportplätze in die Umwelt eingetragen. Da TCR als Elastomer in vielen Statistiken nicht als Plastik geführt wird, wird dieses bisher als potentielles Risiko ignoriert und deshalb nur wenig untersucht. Die seltenen Studien zu diesem Thema belegen jedoch große Sorptionskapazitäten. Als Grund wird der hohe Anteil an Kohlenstoff vermutet. Welche molekularen Eigenschaften das Sorptionsverhalten beeinflussen ist weitgehend unerforscht, doch scheinen Hydrophobizität und Polarität der organischen Materialien den größten Einfluss auf die hohen Sorbatkonzentrationen am TCR zu haben. Ziel dieser Arbeit ist es deshalb, einige dieser Wissenslücken um das TCR und dessen häufigsten Bestandteile Styrol-Butadien-Kautschuk (SBR) und Industrieruß (CB) zu untersuchen, die molekularen Wechselwirkungen zu identifizieren und diese mittels Sorptionsisothermen zu beschreiben. Zusätzlich wird mit verschiedenen wissenschaftlichen Methoden versucht, einige der Materialeigenschaften von CB, SBR und TCR zu definieren. Erwartet wird, aufbauend auf der vorhandenen Literatur, dass CB der Hauptträger der Sorptionseigenschaften von TCR ist und dass sich SBR stark davon unterscheidet. Zusätzlich wird Hydrophobizität und Polarität als maßgebliche Wechselwirkungen der Sorption angenommen, die jedoch von weiteren Eigenschaften, wenn auch in einem geringeren Ausmaß, verstärkt werden. Die Ergebnisse dieser Arbeit bestätigen, dass CB, SBR und TCR eine große Sorptionsaffinität gegenüber den gewählten Sorbaten besitzen, diese jedoch nicht ausschließlich durch die Hydrophobizität und Polarität der organischen Moleküle gesteuert werden. Als sekundäre Sorptionseigenschaften wurden die Molekülstruktur, Dipol-Dipol-Wechselwirkungen, Van-der-Waals-Kräfte und Aromatizität identifiziert. Nicht bestätigt werden konnte die Hypothese, dass der CB-Anteil im TCR die Sorption dominiert. Die Sorptionsisothermen lassen auf ein ähnliches Sorptionsverhalten zwischen SBR und TCR schließen, welches von CB verschieden ist. SBR kann somit als Hauptverursacher der Sorption im TCR identifiziert werden. CB hat auf die Sorption nur einen geringen Einfluss, möglicherweise dadurch bedingt, dass die Poren des CB mit Polymer verfüllt sind. Die Sorptionsisothermen belegen bei allen verwendeten Sorbaten nichtlineare Adsorption durch…

Subjects/Keywords: 38.99 Geowissenschaften: Sonstiges; Sorption / Mikroplastik; sorption / micro plastics

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APA (6^th Edition):

Schönhofer, M. (2018). Sorption ausgewählter organischer Modellsubstanzen an Reifenmaterialien. (Thesis). University of Vienna. Retrieved from http://othes.univie.ac.at/52715/

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):

Schönhofer, Manuel. “Sorption ausgewählter organischer Modellsubstanzen an Reifenmaterialien.” 2018. Thesis, University of Vienna. Accessed March 02, 2021. http://othes.univie.ac.at/52715/.

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

MLA Handbook (7^th Edition):

Schönhofer, Manuel. “Sorption ausgewählter organischer Modellsubstanzen an Reifenmaterialien.” 2018. Web. 02 Mar 2021.

Vancouver:

Schönhofer M. Sorption ausgewählter organischer Modellsubstanzen an Reifenmaterialien. [Internet] [Thesis]. University of Vienna; 2018. [cited 2021 Mar 02]. Available from: http://othes.univie.ac.at/52715/.

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

Council of Science Editors:

Schönhofer M. Sorption ausgewählter organischer Modellsubstanzen an Reifenmaterialien. [Thesis]. University of Vienna; 2018. Available from: http://othes.univie.ac.at/52715/

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

24. Li, Zhi. Devenir des résidus de médicaments dans les sols, biodégradation-sorption : discussion dans un contexte de réutilisation des eaux usées : Fate of pharmaceutical residus in the soil, biodegradation and sorption : discussion in the case of wastewater irrigation.

Degree: Docteur es, Hydrogéologie UM1, 2012, Université Montpellier I

URL: http://www.theses.fr/2012MON13523

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L'irrigation par les eaux usées est une pratique intéressante dans les régions arides et semi-arides où la ressource en eau subit une pression accrue. Cependant,… (more)

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L'irrigation par les eaux usées est une pratique intéressante dans les régions arides et semi-arides où la ressource en eau subit une pression accrue. Cependant, cette pratique risque de contaminer les sols par des contaminants chimiques tels que les polluants organiques émergents comme les médicaments. Les mécanismes de transfert et de transformation de ces molécules sont encore peu connus. L'objectif de cette thèse a été d'étudier les processus de biodégradation et de sorption des médicaments en conditions contrôlées, avec une réflexion dans le contexte de la réutilisation des eaux usées pour l'irrigation. Nous avons exploité la signature chirale de l'antidépresseur venlafaxine (VEN) et de son métabolite humain majeur O-desméthyl venlafaxine (ODV) afin de discriminer le processus biologique et les processus abiotiques. Les résultats au laboratoire ont montré une corrélation entre le taux de biodégradation et le changement de fraction énantiomérique. La fraction énantiomérique de la VEN a été ensuite suivie à la sortie d'une STEP et dans une rivière recevant ce rejet, où un changement de la fraction énantiomérique a été observé, montrant l'intérêt de mieux développer cette approche pour des études de biodégradation in situ. Le processus de sorption des molécules cationiques VEN et ODV a été étudié avec deux approches, statique en batch et dynamique en colonne de lixiviation, avec une comparaison avec les molécules neutres carbamazépine et son métabolite trans-10,11-dihydro-10,11-dihydroxy carbamazepine. L'étude en batch a montré que pH et force ionique a influencé la sorption des molécules cationiques mais pas celle des molécules neutres. L'échange cationique pourrait ainsi jouer un rôle important dans la sorption des molécules cationiques. L'étude de la lixiviation a montré que les molécules neutres ont été plus mobiles que les molécules cationiques et elles sont susceptibles de contaminer l'eau souterraine dans le cas de l'irrigation par des eaux usées.

Wastewater irrigation represents great interest in arid and semi-arid regions where water demand is important. However, wastewater irrigation results in, for example, soil contamination by emerging organic pollutants such as pharmaceuticals. Transport and transformation mechanisms of these substances are still poorly understood. The objective of this thesis was to study the processes of biodegradation and sorption of pharmaceutical products in laboratory experiments, with a special reflection in the context of wastewater irrigation. Firstly, we exploited the chiral signature of the antidepressant venlafaxine (VEN) and its major human metabolite O-desmethyl venlafaxine (ODV) in order to discriminate the biological processes from other processes. Laboratory experiment showed a correlation between the biodegradation rate and the change in enantiomer fraction. The VEN was then monitored at the outlet of a WWTP and in the river receiving the discharge. A change in enantiomer fraction showed the interest for a better development of this application to investigate in…

Advisors/Committee Members: Fenet, Hélène (thesis director), Gomez Hernandez, Maria Elena (thesis director).

Subjects/Keywords: Résidus de médicaments; Biodégradation; Sorption; Pharmaceutical products; Biodegradation; Sorption; 614

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

APA (6^th Edition):

Li, Z. (2012). Devenir des résidus de médicaments dans les sols, biodégradation-sorption : discussion dans un contexte de réutilisation des eaux usées : Fate of pharmaceutical residus in the soil, biodegradation and sorption : discussion in the case of wastewater irrigation. (Doctoral Dissertation). Université Montpellier I. Retrieved from http://www.theses.fr/2012MON13523

Chicago Manual of Style (16^th Edition):

Li, Zhi. “Devenir des résidus de médicaments dans les sols, biodégradation-sorption : discussion dans un contexte de réutilisation des eaux usées : Fate of pharmaceutical residus in the soil, biodegradation and sorption : discussion in the case of wastewater irrigation.” 2012. Doctoral Dissertation, Université Montpellier I. Accessed March 02, 2021. http://www.theses.fr/2012MON13523.

MLA Handbook (7^th Edition):

Li, Zhi. “Devenir des résidus de médicaments dans les sols, biodégradation-sorption : discussion dans un contexte de réutilisation des eaux usées : Fate of pharmaceutical residus in the soil, biodegradation and sorption : discussion in the case of wastewater irrigation.” 2012. Web. 02 Mar 2021.

Vancouver:

Li Z. Devenir des résidus de médicaments dans les sols, biodégradation-sorption : discussion dans un contexte de réutilisation des eaux usées : Fate of pharmaceutical residus in the soil, biodegradation and sorption : discussion in the case of wastewater irrigation. [Internet] [Doctoral dissertation]. Université Montpellier I; 2012. [cited 2021 Mar 02]. Available from: http://www.theses.fr/2012MON13523.

Council of Science Editors:

Li Z. Devenir des résidus de médicaments dans les sols, biodégradation-sorption : discussion dans un contexte de réutilisation des eaux usées : Fate of pharmaceutical residus in the soil, biodegradation and sorption : discussion in the case of wastewater irrigation. [Doctoral Dissertation]. Université Montpellier I; 2012. Available from: http://www.theses.fr/2012MON13523

25. Wlodarczyk, Damien. Elaboration contrôlée de membranes à base de chitosane pour le traitement de l'eau : Elaboration of chitosane membrane for water treatment.

Degree: Docteur es, Génie des procédés, 2015, Montpellier

URL: http://www.theses.fr/2015MONTS271

►

Le travail de thèse présenté dans ce manuscrit a pour objectif de mettre en place un nouveau procédé d’élaboration de membranes à base de chitosane… (more)

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Le travail de thèse présenté dans ce manuscrit a pour objectif de mettre en place un nouveau procédé d’élaboration de membranes à base de chitosane pour le traitement d’effluents acides contenants des ions métallique. Soluble en milieu aqueux acide, le chitosane présente la propriété de gélifier lorsque le pH devient basique, ce qui permet d’envisager l’élaboration de membrane sans solvant organique contrairement aux polymères synthétiques classiques. Par ailleurs, ce travail de thèse s’est intéressé à un procédé original de gélification par voie enzymatique, dans lequel la gélification in-situ de la solution de chitosane permet une structuration contrôlée de la membrane contrairement aux procédés classiques qui donnent lieu à un front de gélification. Une étude des cinétiques de gélification en fonction des paramètres d’élaboration (température et concentration en urée) a mis en évidence que seule la température est significativement influente sur le temps de gélification dès lors que la concentration en urée n’est pas limitante. Un modèle a été mis en place pour décrire la gélification enzymatique du chitosane afin de comprendre les mécanismes des cinétiques réactionnelles et de transferts lors de la formation du gel. Des membranes de chitosane ont ainsi été élaborées par le procédé par voie enzymatique, la porosité de ces membranes ayant été générée avec un agent porogène (PEG 6000) et une réaction d’acétylation du chitosane ayant permis d’obtenir des membranes insolubles en milieu acide. Les membranes obtenues ont été caractérisées en termes de morphologie et de propriétés fonctionnelles (filtration, sorption du Cu(II) comme élément métallique modèle).

The Ph-D work presented in this manuscript aims to develop a new process for elaborate chitosan membranes for treatment of acidic media containing metal ions. Soluble In acidic aqueous media, gelation occurs when the pH becomes basic, allowing elaboration of membrane without the use of organic solvents unlike classical synthetic polymers. Moreover, this Ph-D work has focused on an original process enzymatic gelation which the in-situ gelation of chitosan solution allows a controlled structuration of the membrane unlike conventional processes which leads to a front gelling.A study of gelation time as a function of the elaboration parameters (temperature and urea concentration) highlighted that only the temperature is a main parameter on gelation time since the urea concentration is not limiting. A model was developed to describe the chitosan enzymatic gelation in order to understand mechanisms of reaction kinetics and transfers during the gel formation.Chitosan membranes have been prepared by enzymatic process, the porosity of such membranes have been generated with a blowing agent (PEG 6000) and an acetylation of chitosan having yielded insoluble membranes in acid medium. The resulting membranes were characterized by their morphology and functional properties (filtration, sorption of Cu (II) as model metal element).

Advisors/Committee Members: Faur, Catherine (thesis director).

Subjects/Keywords: GélificatIon enzymatique; Ultrafiltration; Sorption; Enzymatic gelation; Ultrafiltration; Sorption

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

APA (6^th Edition):

Wlodarczyk, D. (2015). Elaboration contrôlée de membranes à base de chitosane pour le traitement de l'eau : Elaboration of chitosane membrane for water treatment. (Doctoral Dissertation). Montpellier. Retrieved from http://www.theses.fr/2015MONTS271

Chicago Manual of Style (16^th Edition):

Wlodarczyk, Damien. “Elaboration contrôlée de membranes à base de chitosane pour le traitement de l'eau : Elaboration of chitosane membrane for water treatment.” 2015. Doctoral Dissertation, Montpellier. Accessed March 02, 2021. http://www.theses.fr/2015MONTS271.

MLA Handbook (7^th Edition):

Wlodarczyk, Damien. “Elaboration contrôlée de membranes à base de chitosane pour le traitement de l'eau : Elaboration of chitosane membrane for water treatment.” 2015. Web. 02 Mar 2021.

Vancouver:

Wlodarczyk D. Elaboration contrôlée de membranes à base de chitosane pour le traitement de l'eau : Elaboration of chitosane membrane for water treatment. [Internet] [Doctoral dissertation]. Montpellier; 2015. [cited 2021 Mar 02]. Available from: http://www.theses.fr/2015MONTS271.

Council of Science Editors:

Wlodarczyk D. Elaboration contrôlée de membranes à base de chitosane pour le traitement de l'eau : Elaboration of chitosane membrane for water treatment. [Doctoral Dissertation]. Montpellier; 2015. Available from: http://www.theses.fr/2015MONTS271

Loughborough University

26. Sameh, Ebong F. Sorption of Ni and Eu to granitic rocks and minerals.

Degree: PhD, 2011, Loughborough University

URL: http://hdl.handle.net/2134/9324

► The work presented in this thesis is divided into two parts. The first part is the sorption of Ni and Eu to granitic materials, and… (more)

Subjects/Keywords: 551.9; CAM modelling; Hysteresis; Sorption kinetics; Autoradiography; Competitive sorption; Exchange capacity

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

APA (6^th Edition):

Sameh, E. F. (2011). Sorption of Ni and Eu to granitic rocks and minerals. (Doctoral Dissertation). Loughborough University. Retrieved from http://hdl.handle.net/2134/9324

Chicago Manual of Style (16^th Edition):

Sameh, Ebong F. “Sorption of Ni and Eu to granitic rocks and minerals.” 2011. Doctoral Dissertation, Loughborough University. Accessed March 02, 2021. http://hdl.handle.net/2134/9324.

MLA Handbook (7^th Edition):

Sameh, Ebong F. “Sorption of Ni and Eu to granitic rocks and minerals.” 2011. Web. 02 Mar 2021.

Vancouver:

Sameh EF. Sorption of Ni and Eu to granitic rocks and minerals. [Internet] [Doctoral dissertation]. Loughborough University; 2011. [cited 2021 Mar 02]. Available from: http://hdl.handle.net/2134/9324.

Council of Science Editors:

Sameh EF. Sorption of Ni and Eu to granitic rocks and minerals. [Doctoral Dissertation]. Loughborough University; 2011. Available from: http://hdl.handle.net/2134/9324

27. Duchateau, Maxime. Étude de l’élaboration en milieu CO2 supercritique de films de TiO2 supportés pour le traitement en mode dynamique d'effluents aqueux radioactifs. : Preparation of TiO2 supported layers in supercritical CO2 media for the treatment of radioactive aqueous effluents in dynamic mode.

Degree: Docteur es, Chimie et Physicochimie des matériaux, 2014, Montpellier, Ecole nationale supérieure de chimie

URL: http://www.theses.fr/2014ENCM0019

►

L'industrie nucléaire publique et militaire génère une quantité importante d'effluents liquides radioactifs qu'il faut traiter avant leur rejet dans l'environnement. Des procédés de décontamination alternatifs… (more)

▼

L'industrie nucléaire publique et militaire génère une quantité importante d'effluents liquides radioactifs qu'il faut traiter avant leur rejet dans l'environnement. Des procédés de décontamination alternatifs aux techniques industrielles (évaporation, traitement chimique) sont en cours de développement, comme par exemple le traitement en colonne ou le couplage filtration/sorption. Une partie des recherches associées à ces techniques de décontamination porte sur l'élaboration et la mise en forme de sorbants spécifiques. Dans ce contexte, les objectifs de cette thèse étaient d'une part d'étudier la synthèse en milieu CO2 supercritique (SC) de films de TiO2 déposés sur des supports macroporeux et d'autre part d'évaluer leur potentiel d'extraction dans ces procédés alternatifs. Une méthode de synthèse reproductible a été mise au point, basée sur la décomposition thermique de l'isopropoxyde de titane en milieu CO2 SC entre 150°C et 350°C. Dès 150°C, cette méthode permet la réalisation de films de TiO2 nanostructurés et adhérents sur des supports macroporeux en céramique (mousses, supports tubulaires en alumine α). L'effet de la température de synthèse de ces matériaux sur leurs caractéristiques physico-chimiques et leurs propriétés de sorption a été étudié sur des poudres de TiO2 élaborées dans les mêmes conditions que les films supportés. Les meilleures performances de sorption ont été observées pour la poudre obtenue à 150°C, du fait de sa plus grande densité de sites de surface par rapport aux poudres élaborée à 250°C et 350°C. Cette température de synthèse (150°C) a donc été sélectionnée pour l'étude détaillée des sorbants composites (TiO2/supports) afin d'évaluer leurs performances de sorption dans les procédés de traitement en continu. Les essais de sorption en colonne ont montré qu'une mousse en alumine macroporeuse (Φpore=400µm) revêtue de TiO2 est adaptée pour traiter des effluents en mode dynamique à fort débit. La taille des macropores et la hauteur de colonne sont des paramètres importants à maitriser. Pour le traitement par filtration/sorption, les membranes de TiO2 présentent une bonne résistance mécanique et sont capables d'extraire le strontium en mode dynamique. D'autre part dans le cas du strontium, les sorbants composites (TiO2/mousse ou TiO2/support tubulaire) sont régénérables à 100% à l'aide d'une solution aqueuse acidifiée (pH=3).

Public and military nuclear industry generates a significant amount of radioactive liquid waste which must be treated before being released into the environment. Decontamination methods alternative to the industrial techniques (evaporation, chemical treatment) are being developed, such as column treatments or coupled filtration/sorption processes. Current researches mainly focus on the development and shaping of specific sorbents. In this context, the objectives of this thesis were first to study the synthesis of TiO2 layers on macroporous ceramic supports in supercritical (SC) CO2 and then to evaluate their potential for radionuclide extraction in these alternative…

Advisors/Committee Members: Julbe, Anne (thesis director).

Subjects/Keywords: CO2 supercritique; TiO2; Couches; Sorption; Supercritical CO2; TiO2; Layers; Sorption; 540

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❌

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

APA (6^th Edition):

Duchateau, M. (2014). Étude de l’élaboration en milieu CO2 supercritique de films de TiO2 supportés pour le traitement en mode dynamique d'effluents aqueux radioactifs. : Preparation of TiO2 supported layers in supercritical CO2 media for the treatment of radioactive aqueous effluents in dynamic mode. (Doctoral Dissertation). Montpellier, Ecole nationale supérieure de chimie. Retrieved from http://www.theses.fr/2014ENCM0019

Chicago Manual of Style (16^th Edition):

Duchateau, Maxime. “Étude de l’élaboration en milieu CO2 supercritique de films de TiO2 supportés pour le traitement en mode dynamique d'effluents aqueux radioactifs. : Preparation of TiO2 supported layers in supercritical CO2 media for the treatment of radioactive aqueous effluents in dynamic mode.” 2014. Doctoral Dissertation, Montpellier, Ecole nationale supérieure de chimie. Accessed March 02, 2021. http://www.theses.fr/2014ENCM0019.

MLA Handbook (7^th Edition):

Duchateau, Maxime. “Étude de l’élaboration en milieu CO2 supercritique de films de TiO2 supportés pour le traitement en mode dynamique d'effluents aqueux radioactifs. : Preparation of TiO2 supported layers in supercritical CO2 media for the treatment of radioactive aqueous effluents in dynamic mode.” 2014. Web. 02 Mar 2021.

Vancouver:

Duchateau M. Étude de l’élaboration en milieu CO2 supercritique de films de TiO2 supportés pour le traitement en mode dynamique d'effluents aqueux radioactifs. : Preparation of TiO2 supported layers in supercritical CO2 media for the treatment of radioactive aqueous effluents in dynamic mode. [Internet] [Doctoral dissertation]. Montpellier, Ecole nationale supérieure de chimie; 2014. [cited 2021 Mar 02]. Available from: http://www.theses.fr/2014ENCM0019.

Council of Science Editors:

Duchateau M. Étude de l’élaboration en milieu CO2 supercritique de films de TiO2 supportés pour le traitement en mode dynamique d'effluents aqueux radioactifs. : Preparation of TiO2 supported layers in supercritical CO2 media for the treatment of radioactive aqueous effluents in dynamic mode. [Doctoral Dissertation]. Montpellier, Ecole nationale supérieure de chimie; 2014. Available from: http://www.theses.fr/2014ENCM0019

Univerzitet u Beogradu

28. Lopičić, Zorica R. 1977-. Proučavanje sorpcionog i energetskog potencijala otpadne biomase Prunus persica L.

Degree: Tehnološko-metalurški fakultet, 2017, Univerzitet u Beogradu

URL: https://fedorabg.bg.ac.rs/fedora/get/o:16540/bdef:Content/get

►

Tehnološko inženjerstvo / Inženjerstvo zaštite životne sredine - Technological engineering / Environmental engineering

Rastuća industrijalizacija i smanjivanje energetskih rezervi uslovilo je istraživanja u pravcu razvoja… (more)

Subjects/Keywords: Lignocellulosic biomass; waste valorization; Prunus persica L.; sorption; copper; sorption kinetic; equilibrium; sorption thermodynamic; thermal degradation

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

APA (6^th Edition):

Lopičić, Z. R. 1. (2017). Proučavanje sorpcionog i energetskog potencijala otpadne biomase Prunus persica L. (Thesis). Univerzitet u Beogradu. Retrieved from https://fedorabg.bg.ac.rs/fedora/get/o:16540/bdef:Content/get

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

Chicago Manual of Style (16^th Edition):

Lopičić, Zorica R 1977-. “Proučavanje sorpcionog i energetskog potencijala otpadne biomase Prunus persica L.” 2017. Thesis, Univerzitet u Beogradu. Accessed March 02, 2021. https://fedorabg.bg.ac.rs/fedora/get/o:16540/bdef:Content/get.

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

MLA Handbook (7^th Edition):

Lopičić, Zorica R 1977-. “Proučavanje sorpcionog i energetskog potencijala otpadne biomase Prunus persica L.” 2017. Web. 02 Mar 2021.

Vancouver:

Lopičić ZR1. Proučavanje sorpcionog i energetskog potencijala otpadne biomase Prunus persica L. [Internet] [Thesis]. Univerzitet u Beogradu; 2017. [cited 2021 Mar 02]. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:16540/bdef:Content/get.

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

Council of Science Editors:

Lopičić ZR1. Proučavanje sorpcionog i energetskog potencijala otpadne biomase Prunus persica L. [Thesis]. Univerzitet u Beogradu; 2017. Available from: https://fedorabg.bg.ac.rs/fedora/get/o:16540/bdef:Content/get

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

University of Lund

29. Saeidpour, Mahsa. Experimental studies of sorption and transport of moisture in cement based materials with supplementary cementitious materials.

Degree: 2015, University of Lund

URL: https://lup.lub.lu.se/record/7791514 ; https://portal.research.lu.se/ws/files/4026457/7793782.pdf

► Most deterioration processes in cement based materials are closely related to moisture sorption and moisture transport properties. Therefore, it is important to study these properties,… (more)

▼ Most deterioration processes in cement based materials are closely related to moisture sorption and moisture transport properties. Therefore, it is important to study these properties, both theoretically and practically. This work is an experimental investigation in this field. Nowadays, the cement industry produces cements with increasing amounts of supplementary cementitious materials (SCMs) to limit CO2 emissions from concrete production. Knowledge about the moisture properties of concrete made from these blended cements is limited. This project has therefore been an attempt to further develop our understanding of the moisture properties of cement based materials, such as sorption isotherms and sorption transport properties in the presence of SCMs. This has been done by studying sorption isotherms mainly using the sorption balance method, and moisture transport coefficients using both the cup method and a sorption dynamic method. The experimental investigations were made on three types of hydrated cement pastes and mortars (OPC, OPC + 70% slag and OPC + 10% silica fume) with three different w/b –ratios (w/b) for cement paste (0.6, 0.5, 0.4) and two different w/b for cement mortar (0.5, 0.4). Sorption isotherms were determined for cement pastes and mortars in both hygroscopic and the super-hygroscopic relative humidity ranges using the sorption balance method, and the pressure plate method. The conclusion from this part of the study was that the desorption isotherms at low RH (0-30%) for different binders and different w/b-ratios are similar. At higher RHs the samples with silica fume and slag have higher moisture content than OPC samples. This is explained by that they have a higher amount of gel pores and a lower amount of capillary pores than OPC samples. The sorption isotherm at high RHs is difficult to validate experimentally, due to the critical RH of pore solutions. Steady-state and transient measurements of transport coefficients were also made. The dynamic sorption method was used to evaluate the diffusivity in small paste samples. The results show that Fick's law cannot completely describe the transport process in such small samples and sorption behavior is therefore anomalous with two processes with different time scales. One of these is macro-diffusion into the sample, which takes place on a shorter timescale in the small samples used. The second process takes place on longer timescales and it is possibly related to the sorption in nanometer-structure of materials. To better understand the transport properties in sorption cycles, steady-state diffusion coefficients of mortar samples were measured with a newly developed cup method set-up. The measurements were done on both the absorption and desorption limbs of sorption isotherms. For OPC samples the results show a clear difference between the diffusion coefficients in absorption and desorption with vapor content as potential (Dv) and presented as a function of relative humidity (RH). The Dv in desorption is higher than absorption especially at high RHs.…

Subjects/Keywords: Materials Engineering; Cement; Concrete; Moisture transport; Hysteresis; Supplementary cementitious materials; Water vapor sorption; Sorption isotherms; Anomalous sorption

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

APA (6^th Edition):

Saeidpour, M. (2015). Experimental studies of sorption and transport of moisture in cement based materials with supplementary cementitious materials. (Doctoral Dissertation). University of Lund. Retrieved from https://lup.lub.lu.se/record/7791514 ; https://portal.research.lu.se/ws/files/4026457/7793782.pdf

Chicago Manual of Style (16^th Edition):

Saeidpour, Mahsa. “Experimental studies of sorption and transport of moisture in cement based materials with supplementary cementitious materials.” 2015. Doctoral Dissertation, University of Lund. Accessed March 02, 2021. https://lup.lub.lu.se/record/7791514 ; https://portal.research.lu.se/ws/files/4026457/7793782.pdf.

MLA Handbook (7^th Edition):

Saeidpour, Mahsa. “Experimental studies of sorption and transport of moisture in cement based materials with supplementary cementitious materials.” 2015. Web. 02 Mar 2021.

Vancouver:

Saeidpour M. Experimental studies of sorption and transport of moisture in cement based materials with supplementary cementitious materials. [Internet] [Doctoral dissertation]. University of Lund; 2015. [cited 2021 Mar 02]. Available from: https://lup.lub.lu.se/record/7791514 ; https://portal.research.lu.se/ws/files/4026457/7793782.pdf.

Council of Science Editors:

Saeidpour M. Experimental studies of sorption and transport of moisture in cement based materials with supplementary cementitious materials. [Doctoral Dissertation]. University of Lund; 2015. Available from: https://lup.lub.lu.se/record/7791514 ; https://portal.research.lu.se/ws/files/4026457/7793782.pdf

Ruhr Universität Bochum

30. Fieback, Tobias. Entwicklung und Aufbau einer universellen Apparatur zur Messung der selektiven Sorption von gasförmigen und überkritischen Gemischen in festen und flüssigen Sorbentien.

Degree: 2009, Ruhr Universität Bochum

URL: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-25102

► In dieser Arbeit wurde eine universelle Sorptionsmessapparatur für den Druckbereich von Vakuum bis 40MPa und Temperaturen bis zu 200 °C entwickelt. Sie besteht aus einer… (more)

Subjects/Keywords: Sorption; Ionische Flüssigkeit; Magnetschwebewaage; Hochdruck; Gravimetrie

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

APA (6^th Edition):

Fieback, T. (2009). Entwicklung und Aufbau einer universellen Apparatur zur Messung der selektiven Sorption von gasförmigen und überkritischen Gemischen in festen und flüssigen Sorbentien. (Thesis). Ruhr Universität Bochum. Retrieved from http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-25102

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):

Fieback, Tobias. “Entwicklung und Aufbau einer universellen Apparatur zur Messung der selektiven Sorption von gasförmigen und überkritischen Gemischen in festen und flüssigen Sorbentien.” 2009. Thesis, Ruhr Universität Bochum. Accessed March 02, 2021. http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-25102.

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

MLA Handbook (7^th Edition):

Fieback, Tobias. “Entwicklung und Aufbau einer universellen Apparatur zur Messung der selektiven Sorption von gasförmigen und überkritischen Gemischen in festen und flüssigen Sorbentien.” 2009. Web. 02 Mar 2021.

Vancouver:

Fieback T. Entwicklung und Aufbau einer universellen Apparatur zur Messung der selektiven Sorption von gasförmigen und überkritischen Gemischen in festen und flüssigen Sorbentien. [Internet] [Thesis]. Ruhr Universität Bochum; 2009. [cited 2021 Mar 02]. Available from: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-25102.

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

Council of Science Editors:

Fieback T. Entwicklung und Aufbau einer universellen Apparatur zur Messung der selektiven Sorption von gasförmigen und überkritischen Gemischen in festen und flüssigen Sorbentien. [Thesis]. Ruhr Universität Bochum; 2009. Available from: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-25102

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

Open Access Theses and Dissertations