Leung, Tsz Yan. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2008. / Includes bibliographical references (leaves 132-146). / Abstracts in English and Chinese. / Acknowledgements --- p.i / Abstract --- p.ii / Table of Contents --- p.vii / List of Figures --- p.xii / List of Plates --- p.xiv / List of Tables --- p.xvii / Abbreviations --- p.xviii / Equations --- p.xxi / Chapter 1. --- Introduction --- p.1 / Chapter 1.1 --- Water crisis and water disinfection --- p.1 / Chapter 1.2 --- Common disinfection methods --- p.2 / Chapter 1.2.1 --- Chlorination --- p.2 / Chapter 1.2.2 --- Ozonation --- p.4 / Chapter 1.2.3 --- Ultraviolet-C (UV-C) irradiation --- p.6 / Chapter 1.2.4 --- Solar disinfection (SODIS) --- p.7 / Chapter 1.2.5 --- Mixed disinfectants --- p.9 / Chapter 1.2.6 --- Other disinfection methods --- p.10 / Chapter 1.3 --- Advanced oxidation processes (AOPs) --- p.11 / Chapter 1.4 --- Photocatalytic oxidation (PCO) --- p.13 / Chapter 1.4.1 --- Understanding of PCO process --- p.15 / Chapter 1.4.2 --- Proposed disinfection mechanism of PCO --- p.18 / Chapter 1.4.3 --- Titanium dioxide (Ti02) photocatalyst --- p.21 / Chapter 1.4.4 --- Irradiation sources --- p.22 / Chapter 1.4.5 --- Bacterial species --- p.23 / Chapter 1.4.5.1 --- Escherichia coli K12 --- p.23 / Chapter 1.4.5.2 --- Shigella sonnei --- p.24 / Chapter 1.4.5.3 --- Alteromonas alvinellae --- p.25 / Chapter 1.4.5.4 --- Photobacterium phosphoreum --- p.26 / Chapter 1.4.6 --- Bacterial defense mechanism towards oxidative stress --- p.27 / Chapter 1.4.6.1 --- Superoxide dismutase (SOD) activity --- p.28 / Chapter 1.4.6.2 --- Catalase (CAT) activity --- p.29 / Chapter 1.4.6.3 --- Fatty acid (FA) profile --- p.30 / Chapter 1.4.7 --- Significance of the project --- p.31 / Chapter 2. --- Objectives --- p.34 / Chapter 3. --- Material and Methods --- p.36 / Chapter 3.1 --- Chemicals --- p.36 / Chapter 3.2 --- Screening of freshwater and marine bacterial culture --- p.36 / Chapter 3.3 --- Photocatalytic reaction --- p.39 / Chapter 3.3.1 --- Preparation of reaction mixture --- p.39 / Chapter 3.3.2 --- Preparation of bacterial culture --- p.39 / Chapter 3.3.3 --- Photocatalytic reactor --- p.41 / Chapter 3.3.4 --- PCO disinfection reaction --- p.42 / Chapter 3.3.4.1 --- Effect of initial pH --- p.44 / Chapter 3.3.4.2 --- Effect of reaction temperature --- p.45 / Chapter 3.3.4.3 --- Effect of growth phases --- p.45 / Chapter 3.4 --- Measurement of superoxide dismutase (SOD) activity --- p.47 / Chapter 3.5 --- Measurement of catalase (CAT) activity --- p.49 / Chapter 3.6 --- Fatty acid (FA) profile --- p.50 / Chapter 3.7 --- Bacterial regrowth test --- p.51 / Chapter 3.8 --- Atomic absorption spectrophotometry (AAS) --- p.52 / Chapter 3.9 --- Total organic carbon (TOC) analysis --- p.53 / Chapter 3.10 --- Chlorination --- p.55 / Chapter 3.11 --- UV-C irradiation --- p.56 / Chapter 3.12 --- Transmission electron microscopy (TEM) --- p.56 / Chapter 4. --- Results --- p.60 / Chapter 4.1 --- Screening of UV-A resistant freshwater and marine bacteria --- p.60 / Chapter 4.2 --- Control experiments --- p.62 / Chapter 4.3 --- Treatment experiments --- p.65 / Chapter 4.3.1 --- UV-A irradiation from lamps --- p.65 / Chapter 4.3.2 --- Fluorescent light from fluorescent lamps --- p.65 / Chapter 4.3.3 --- Effect of initial pH --- p.67 / Chapter 4.3.4 --- Effect of reaction temperature --- p.70 / Chapter 4.3.5 --- Effect of growth phases --- p.70 / Chapter 4.4 --- Factors affecting bacterial sensitivity towards PCO --- p.73 / Chapter 4.4.1 --- Superoxide dismutase (SOD) and catalase (CAT) activities --- p.73 / Chapter 4.4.2 --- Superoxide dismutase (SOD) and catalase (CAT) induction --- p.74 / Chapter 4.4.3 --- Fatty acid (FA) profile --- p.75 / Chapter 4.5 --- Bacterial regrowth test --- p.78 / Chapter 4.6 --- Disinfection mechanisms of fluorescent light-driven photocatalysis --- p.79 / Chapter 4.6.1 --- Atomic absorption spectrophotometry (AAS) --- p.79 / Chapter 4.6.2 --- Total organic carbon (TOC) analysis --- p.81 / Chapter 4.6.3 --- Transmission electron microscopy (TEM) --- p.83 / Chapter 4.7 --- Chlorination --- p.89 / Chapter 4.7.1 --- Disinfection efficiency --- p.89 / Chapter 4.7.2 --- Transmission electron microscopy (TEM) --- p.92 / Chapter 4.8 --- UV-C irradiation --- p.96 / Chapter 4.8.1 --- Disinfection efficiency --- p.96 / Chapter 4.8.2 --- Transmission electron microscopy (TEM) --- p.96 / Chapter 5. --- Discussions --- p.103 / Chapter 5.1 --- Screening of UV-A resistant freshwater and marine bacteria --- p.103 / Chapter 5.2 --- Comparison of PCO coupled with UV-A lamps and fluorescent lamps --- p.103 / Chapter 5.3 --- Effect of initial pH --- p.105 / Chapter 5.4 --- Effect of reaction temperature --- p.106 / Chapter 5.5 --- Effect of growth phases --- p.107 / Chapter 5.6 --- Factors affecting bacterial sensitivity towards PCO --- p.108 / Chapter 5.6.1 --- Superoxide dismutase (SOD) and catalase (CAT) activities --- p.108 / Chapter 5.6.2 --- Superoxide dismutase (SOD) and catalase (CAT) induction --- p.110 / Chapter 5.6.3 --- Fatty acid (FA) profile --- p.110 / Chapter 5.6.4 --- Cell wall structure --- p.112 / Chapter 5.6.5 --- Bacterial size --- p.114 / Chapter 5.6.6 --- Other possible factors --- p.114 / Chapter 5.7 --- Bacterial regrowth test --- p.115 / Chapter 5.8 --- Disinfection mechanisms of fluorescent light-driven photocatalysis --- p.116 / Chapter 5.8.1 --- Atomic absorption spectrophotometry (AAS) --- p.116 / Chapter 5.8.2 --- Total organic carbon (TOC) analysis --- p.117 / Chapter 5.8.3 --- Transmission electron microscopy (TEM) --- p.118 / Chapter 5.9 --- Chlorination --- p.122 / Chapter 5.9.1 --- Disinfection efficiency --- p.122 / Chapter 5.9.2 --- Transmission electron microscopy (TEM) --- p.122 / Chapter 5.10 --- UV-C irradiation --- p.123 / Chapter 5.10.1 --- Disinfection efficiency --- p.123 / Chapter 5.10.2 --- Transmission electron microscopy (TEM) --- p.124 / Chapter 5.11 --- Comparisons of three disinfection methods --- p.124 / Chapter 6. --- Conclusions --- p.126 / Chapter 7. --- References --- p.132
| Identifer | oai:union.ndltd.org:cuhk.edu.hk/oai:cuhk-dr:cuhk_326576 |
| Date | January 2008 |
| Contributors | Leung, Tsz Yan., Chinese University of Hong Kong Graduate School. Division of Biology. |
| Source Sets | The Chinese University of Hong Kong |
| Language | English, Chinese |
| Detected Language | English |
| Type | Text, bibliography |
| Format | print, xxi, 146 leaves : ill. (some col.) ; 30 cm. |
| Rights | Use of this resource is governed by the terms and conditions of the Creative Commons “Attribution-NonCommercial-NoDerivatives 4.0 International” License (http://creativecommons.org/licenses/by-nc-nd/4.0/) |
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