Thesis (Ph. D)--Ohio State University, 2002. / Title from first page of PDF file. Document formatted into pages; contains xxii, 119 p.: ill. Includes abstract and vita. Advisor: Harold W. Walker, Civil Engineering Program. Includes bibliographical references (p. 115-119).

Thesis (M.S.)--University of Tennessee, Knoxville, 2004. / Title from title page screen (viewed Sept. 27, 2004). Thesis advisor: Gregory D. Reed. Document formatted into pages (x, 155 p. : ill. (some col.)). Vita. Includes bibliographical references (p. 103-106).

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1976. / Also available via the Internet.

In this study photoelectrocatalytic technology has been combined with fuel cell technology in an attempt to provide a stand alone water polishing device to be applied to the water purification industry. Tungsten trioxide was chosen as the photoelectrocatalyst to be applied to the fuel cell membrane electrode assembly (MEA). In this thesis two possible WO₃-based photoanodes were studied. Firstly a Nafion-loaded WO₃ photoanode utilising the state of the art proton conductor Nafion in the MEA. The second WO₃-based photoanode was synthesised by a sol-gel method with a view to being directly sintered onto a not yet developed solid state MEA containing a proton conductive glass. In both methods electrochemical studies were undertaken with both WO₃ based photoanodes deposited on fluorine doped tin oxide glass (FTO). The WO₃ catalysts were studied by X-ray diffraction, Raman spectroscopy, Nitrogen adsorption and UV-visible spectroscopy. Electrochemical studies included cyclic voltametry and linear sweep voltametry under illumination to ascertain the photocurrent densities of the photoanodes and hence their ability to degrade water borne contaminants. The underlying materials properties were explored as well as the nature of the deposition to gain insight into the mechanisms responsible for effective photoelectrocatalytic activity. The Nafion-loaded WO₃ was applied to a Nafion membrane based MEA and utilised in a photoelectrocatalytic fuel cell. This was studied for possible application under self sustaining conditions for application in the water industry.

Thesis (Ph. D.)--University of Missouri-Columbia, 2001. / Typescript. Vita. Includes bibliographical references (leaves 373-387). Also available on the Internet.

Thesis (Ph. D.)--University of Missouri-Columbia, 2001. / Typescript. Vita. Includes bibliographical references (leaves 373-387). Also available on the Internet.

Thesis (MTech. degree inChemistry.)--Tshwane University of Technology, 2010. / Introduction: Since the establishment of relationships between BOD, COD and TOC in early 1980’s, total organic carbon (TOC) analysis has been the analytical backbone of many water treatment laboratories (Furlong et al. 1999). It is only a question of time before South Africa follows suite, if only to adhere to export legislation and requirements. The question is whether TOC is just another expensive analytical tool for policing effluent, or is TOC results valid criteria for monitoring pollution. Aim: The purpose of this project was to evaluate the determination of TOC as a management tool on a wastewater treatment plant (WWTP) and compare it to the chemical oxygen demand (COD) analysis traditionally applied. Experimental: Five sampling points throughout the wastewater treatment plant were evaluated. A possible comparison between TOC and COD was investigated. Sampling was done using an ISCO 3700 portable sampler at each individual sampling point. The samples were filtered and analysed for TOC in the laboratory using an ISCO EZ 3500 TOC analyser. COD analysis was done colorimetrically by using a Hach DR 2000 photometer. Both analyses were done according to standard methods for water and wastewater. Because the ISCO EZ 3500 TOC is an online instrument, it was evaluated at two of the wastewater treatment plant. Results: The analysis of TOC is a more rapid method than COD for the determination of organic load and thus has the potential for better early warning and pollution control management. The change in chemical composition of raw sewage made it difficult to find consistent correlation between COD and TOC results. However, it was found that an online TOC analyses was a practical alternative to COD for plant control, process management and monitoring of inflow and effluent flows in wastewater treatment plant. Conclusion: Limitations of TOC analysis must be considered and include practical problems due to the high content of suspended solids in raw sewage and activated sludge, as well as the partial oxidation of certain organic compounds by ultra-violet/persulphate digestion. Although COD analysis is chemically hazardous and time-consuming compared to TOC analysis, it is not likely that TOC will replace COD on the WWTP, due to historical data accumulation, practicality and people’s natural opposition to change. However, it is hoped that the results of this study will increase knowledge about TOC and be used for practical implementation where this technique has advantages over COD

Thesis (Professional Degree)--University of Missouri, School of Mines and Metallurgy, 1926. / The entire thesis text is included in file. Typescript. Title from title screen of thesis/dissertation PDF file (viewed September 15, 2009) Includes bibliographical references and index.

Thesis (M.S.)--Wisconsin. / Includes bibliographical references (leaf 54).

Research has shown biological filtration can be a successful treatment for manganese (Mn) removal from groundwater and surface water. In this study, bench-scale direct biofiltration was used to remove Mn and dissolved organic carbon (DOC) from a pH 6 surface water source in Halifax, Canada. The removal of Mn in pH 6 surface water was significantly (? = 0.05) removed with 200-300 µg/L phosphorus (P), and 500 µg/L hydrogen peroxide (H2O2). DOC removal was significantly (? = 0.05) improved with granular activated carbon (GAC) media, P enhancement at 200-300 µg/L, and H2O2 enhancement at 500 µg/L. Mn was likely removed by biological oxidation and physical adsorption to biogenic Mn and iron (Fe) oxides. These results show direct biofiltration of surface water at pH 6 can remove Mn below the 50 µg/L aesthetic guideline from a Mn loading of over 1 mg/L. Further research is required to verify the microbial mechanism.