據稿本影印 / 論文(哲學碩士)--香港中文大學硏究院地理學部,1993. / 參考文獻: leaves 212-219 / 郭錦添. / Chapter I. --- 導論 / Chapter A. --- 引言 --- p.1 / Chapter B. --- 研究目的 --- p.1 / Chapter C. --- 研究意義 --- p.3 / Chapter D. --- 理論架構 --- p.4 / Chapter 1. --- 化學形態 --- p.4 / Chapter a. --- 水體中重金屬化學形態分類 --- p.6 / Chapter b. --- 顆粒態重金屬化學形態分類 --- p.7 / Chapter 2. --- 重金屬化學形態與其毒性的關係 --- p.10 / Chapter 3. --- 化學形態分析方法及其困難 --- p.13 / Chapter 4. --- 重金屬在水體與沉積物交接面間的活動 --- p.15 / Chapter 5. --- 重金屬遷移與形態間轉化機制 --- p.17 / Chapter E. --- 香港過往對海港中重金屬的研究 --- p.19 / Chapter II. --- 研究方法 / Chapter A. --- 研究策略 --- p.22 / Chapter B. --- 採樣點分佈 --- p.23 / Chapter C. --- 野外採樣方法 --- p.25 / Chapter D. --- 分析項目及方法 --- p.26 / Chapter 1. --- 重金屬的選擇 --- p.26 / Chapter a. --- 毒性 --- p.26 / Chapter b. --- 濃度 --- p.27 / Chapter c. --- 參考數據 --- p.27 / Chapter 2. --- 分離技術和分析方法 --- p.28 / Chapter a. --- 重金屬分祈法 --- p.28 / Chapter b. --- 水樣分析法 --- p.30 / Chapter c. --- 沉積物樣本分析法 --- p.31 / Chapter d. --- 試劑配備 --- p.32 / Chapter e. --- 選擇以上分析項目的原因 --- p.33 / Chapter f. --- 模擬實驗的設計 --- p.34 / Chapter III. --- 香港近岸沉積物中重金屬含量及其化學形態分佈 / Chapter A. --- 引言 --- p.39 / Chapter B. --- 總濃度分析 --- p.39 / Chapter C. --- 化學形態分析 --- p.40 / Chapter D. --- 總結 --- p.44 / Chapter IV. --- 荃灣個案研究 / Chapter A. --- 研究目的及其重要性 --- p.45 / Chapter B. --- 研究结果 --- p.46 / Chapter 1. --- 水質 --- p.46 / Chapter a. --- 荃灣海域的水文情況 --- p.46 / Chapter b. --- 水污染的空間與時間分佈規律 --- p.48 / Chapter c. --- 水體中重金屬污染物的濃度與存在形態 --- p.49 / Chapter d. --- 小结 --- p.50 / Chapter 2. --- 海底沉積物 --- p.51 / Chapter a. --- 荃灣海域底泥的化學特性 --- p.51 / Chapter b. --- 荃灣海泥中重金屬的存在化學形態 --- p.52 / Chapter C. --- 討論 --- p.54 / Chapter D. --- 從個案研究看全港重金屬污染（沉降）特性 --- p.55 / Chapter V. --- 模擬實驗 / Chapter A. --- 引言 --- p.57 / Chapter B. --- 沉降反應模擬實驗的設計及目的 --- p.57 / Chapter 1. --- 形態轉化模擬 --- p.57 / Chapter 2. --- 沉降模擬 --- p.56 / Chapter 3. --- 渠口反應模擬 --- p.58 / Chapter C. --- 釋放模擬實驗的設計及目的 --- p.59 / Chapter 1. --- 疏浚模擬 --- p.59 / Chapter 2. --- 棄置模擬 --- p.60 / Chapter 3. --- 氧化模擬 --- p.60 / Chapter 4. --- 降雨模擬 --- p.60 / Chapter D. --- 實驗條件 --- p.61 / Chapter E. --- 沉降模擬實驗结果 --- p.66 / Chapter 1. --- 形態轉化模擬實驗结果 --- p.66 / Chapter 2. --- 沉降實驗结果 --- p.68 / Chapter 3. --- 渠口反應模擬實驗结果 --- p.70 / Chapter 4. --- 沉降模擬實驗结論 --- p.79 / Chapter F. --- 釋放模擬實驗结果 --- p.80 / Chapter 1. --- 疏浚模擬實驗结果 --- p.81 / Chapter 2. --- 棄置模擬實驗結果 --- p.82 / Chapter 3. --- 氧化模擬實驗结果 --- p.88 / Chapter 4. --- 降雨模擬實驗结果 --- p.90 / Chapter 5. --- 釋放模擬實驗结論 --- p.91 / Chapter VI. --- 討論 / Chapter A. --- 本港海域的重金屬存在形態與其活動性及毒性的關係 --- p.93 / Chapter B. --- 現存於本港海泥中重金屬形態分佈的形成機制和遷移條件 --- p.95 / Chapter 1. --- 形態分佈的形成機制 --- p.95 / Chapter 2. --- 遷移條件 --- p.96 / Chapter C. --- "環境管理-水質管制,疏浚和填海等工程對底泥中重金屬的影響" --- p.97 / Chapter D. --- 海泥中重金屬污染的空間分佈特性（擴散模型） --- p.98 / Chapter E. --- 總结 --- p.99 / Chapter VII. --- 结論 / Chapter A. --- 總结研究结果 --- p.101 / Chapter B. --- 研究中某些較特別的發現 --- p.104 / Chapter C. --- 研究的局限與展望 --- p.105

by Cheung May Shuen. / Thesis (M.Phil.)--Chinese University of Hong Kong, 1996. / Includes bibliographical references (leaves 157-165). / ABSTRACT --- p.i / ACKNOWLEDGEMENTS --- p.ii / LIST OF FIGURES --- p.vi-ix / LIST OF PLATES --- p.x / LIST OF TABLES --- p.xi / Chapter CHAPTER I - --- INTRODUCTION / Chapter 1.1 --- Background of Quaternary Studies in Hong Kong --- p.1 / Chapter 1.2 --- The Necessity of Regional and Local Practice --- p.3 / Chapter 1.3 --- The Need for Regional Synthesis --- p.6 / Chapter 1.4 --- Linking Onshore Studies with Offshore Ones --- p.8 / Chapter 1.5 --- The Yuen Long Floodplain --- p.10 / Chapter 1.5.1 --- Previous Work --- p.10 / Chapter 1.5.2 --- The Need for Detailed Study --- p.12 / Chapter 1.6 --- Objectives of the Study --- p.13 / Chapter 1.7 --- Significance of the Study --- p.14 / Chapter CHAPTER II - --- LITERATURE REVIEW / Chapter 2.1 --- Introduction --- p.17 / Chapter 2.2 --- The Quaternary Period --- p.18 / Chapter 2.3 --- Global Pleistocene Sea-level Reduction --- p.19 / Chapter 2.4 --- Evidence of Pleistocene Sea-level Reduction in South China and Hong Kong --- p.20 / Chapter 2.5 --- The Postglacial Rise in Sea-level --- p.22 / Chapter 2.6 --- Holocene Sea-level Movements in Zhujiang Delta and Hong Kong --- p.23 / Chapter 2.7 --- Hong Kong Quaternary Studies --- p.26 / Chapter 2.7.1 --- A Wealth of Offshore Studies --- p.26 / Chapter 2.7.2 --- A Lack of Onshore Studies --- p.27 / Chapter 2.8 --- Methods of Investigation --- p.28 / Chapter 2.9 --- Offshore Quaternary Sediments in Hong Kong --- p.30 / Chapter 2.9.1 --- The Chek Lap Kok Formation --- p.31 / Age of Formation --- p.32 / Seismic Characteristics --- p.33 / Lithology --- p.33 / Sedimentary Environment --- p.34 / Chapter 2.9.2 --- The Sham Wat Formation --- p.36 / Age of Formation --- p.36 / Seismic Characteristics --- p.37 / Lithology --- p.37 / Sedimentary Environment --- p.38 / Chapter 2.9.3 --- The Hang Hau Formation --- p.39 / Age of Formation --- p.39 / Seismic Characteristics --- p.40 / Lithology --- p.40 / Sedimentary Environment --- p.41 / Chapter 2.10 --- Summary of Hong Kong Quaternary Superficial Geology --- p.42 / Chapter CHAPTER III - --- STUDY AREA / Chapter 3.1 --- Introduction --- p.44 / Chapter 3.2 --- Geographical Setting and Existing Development --- p.45 / Chapter 3.3 --- Relief --- p.47 / Chapter 3.4 --- Climate --- p.47 / Chapter 3.5 --- Surface Hydrology --- p.51 / Chapter 3.6 --- Geology --- p.51 / Chapter 3.7 --- Geomorphology --- p.53 / Chapter 3.8 --- Superficial Deposits --- p.55 / Chapter 3.9 --- The Hong Kong Geological Survey --- p.58 / Chapter 3.10 --- Location of Boreholes BGS 11 and 23 --- p.58 / Chapter CHAPTER IV - --- METHODOLOGY / Chapter 4.1 --- Introduction --- p.61 / Chapter 4.2 --- Borehole Collection --- p.61 / Chapter 4.3 --- Analytical Approach --- p.62 / Chapter 4.4 --- Laboratory Logging and Description --- p.64 / Chapter 4.5 --- Sedimentological Analysis --- p.65 / Chapter 4.6 --- Geochemical Analysis --- p.66 / Chapter 4.7 --- Micropalaeontological Analysis --- p.71 / Chapter 4.8 --- Chronological Analysis --- p.73 / Chapter 4.9 --- Stratigraphy and Borehole Comparison --- p.74 / Chapter CHAPTER V - --- BGS 11 - DESCRIPTION AND DISCUSSION / Chapter 5.1 --- Introduction --- p.75 / Chapter 5.2 --- Geological Description of Borehole BGS 11 --- p.76 / Chapter 5.3 --- Geochemical Results --- p.90 / Chapter 5.3.1 --- Soil Reaction pH --- p.91 / Chapter 5.3.2 --- Electrical Conductivity --- p.91 / Chapter 5.3.3 --- Organic Carbon --- p.93 / Chapter 5.3.4 --- Calcium Carbonates --- p.93 / Chapter 5.4 --- Micropalaeontological Results --- p.94 / Chapter 5.4.1 --- Diatom Results --- p.94 / Chapter 5.4.2 --- Sponge Spicules Results --- p.98 / Chapter 5.5 --- Radiocarbon Dating Results --- p.100 / Chapter 5.6 --- Environmental Interpretations --- p.101 / Chapter 5.6.1 --- The Terrestrial Sequence (20.70 to 8.10m) --- p.101 / The Colluvial Unit (20.70 to 16.50m) --- p.102 / The Floodplain Unit (16.50 to 8.10m) --- p.103 / The Palaeosol Unit (8.10 to 7.26m) --- p.107 / Chapter 5.6.2 --- The Shallow Marine Sequence (7.26 to 4.05m) --- p.108 / Chapter 5.6.3 --- The Coastal Swamp Sequence (4.05 to 2.35m) --- p.111 / Chapter 5.7 --- Conclusion --- p.113 / Chapter CHAPTER VI - --- BGS 23 - DESCRIPTION AND DISCUSSION / Chapter 6.1 --- Introduction --- p.114 / Chapter 6.2 --- Geological Description of Borehole BGS 23 --- p.114 / Chapter 6.3 --- Geochemical Results --- p.126 / Chapter 6.4 --- Micropalaeontological Results --- p.129 / Chapter 6.5 --- Environmental Interpretation --- p.129 / Chapter 6.5.1 --- The Weathered Shale Sequence (15.90 to 15.00m) --- p.130 / Chapter 6.5.2 --- The Fluvial Sequence (13.65 to 2.85m) --- p.131 / Chapter 6.5.3 --- The Backswamp Sequence (2.85 to 1.73m) --- p.135 / Chapter 6.6 --- Conclusion --- p.137 / Chapter CHAPTER VII - --- STRATIGRAPHICAL INTERPRETATION AND COMPARISON / Chapter 7.1 --- Introduction --- p.138 / Chapter 7.2 --- Stratigraphical Division in Hong Kong and the Zhujiang Delta --- p.138 / Chapter 7.3 --- Stratigraphical Interpretation of BGS 11 --- p.140 / Chapter 7.4 --- Stratigraphical Interpretation of BGS 23 --- p.142 / Chapter 7.5 --- Stratigraphic Comparison --- p.143 / Chapter 7.5.1 --- Comparison with Onshore Boreholes --- p.143 / Chapter 7.5.2 --- Comparison with Offshore Boreholes in Hong Kong and Zhujiang Delta --- p.147 / Chapter 7.6 --- Conclusion --- p.150 / Chapter CHAPTER VIII - --- SUMMARY AND CONCLUSION / Chapter 8.1 --- Summary of Findings --- p.151 / Chapter 8.2 --- Limitations --- p.153 / Chapter 8.3 --- Future Work --- p.155 / REFERENCES --- p.157 / APPENDICES / APPENDIX A The complete logging sheets for BGS11 / APPENDIX B The complete logging sheets for BGS23

No description available.

In 1970 the Arrow oil spill off Cape Breton contaminated 305 kilometres of shoreline. Aerial and land surveys have demonstrated that natural weathering has occurred throughout this period, but it was relatively slow, especially in sheltered areas like Black Duck Cove lagoon. This study analyzed the microbial hydrocarbon degradation potential in the lagoon sediments using direct and culture-based techniques. Mineralization of hydrocarbon substrates (hexadecane, octacosane and naphthalene) indicated the presence of an active degradative microbial community, however, genes from known bacterial hydrocarbon degradation pathways (alkB, ndoB, phnAc) were not detected by direct extraction of sediment DNA and PCR amplification. Sediment enrichment cultures had increased mineralization rates for naphthalene and hexadecane, and a hexadecane-degrading pure culture, Rhodococcus sp. BDC14, with a typical alkB gene was isolated. PCR analysis of total community DNA extracted directly from the enrichments indicated the presence of the Alcanivorax borkumensis alkB1 genotype. The results demonstrated that there were notable differences between culture-based and direct molecular analytical techniques in characterizing the contaminated sediments.

Thesis (Ph. D.)--Centre Universitaire de Perpignan, 1977. / Errata sheet inserted, v. 1. Includes bibliographical references (Vol. 1, p. [i]-xxxix).

No description available.

No description available.

Heinrich Events (HEs) define intervals of major ice rafting from the Laurentide Ice Sheet (LIS) into the North Atlantic during that last glacial period. The discovery of potential European-sourced precursors to HEs suggest that the smaller, but climactically sensitive, European ice sheets (EIS) may have played a role in the triggering of HEs and their impact on global climates. Environmental magnetism has proved itself to be a useful, rapid and non-destructive tool in the identification and quantification of provenance in sediments from various depositional environments. In this work, environmental magnetic analyses are applied to marine sediment records from the European margin of the NE Atlantic and known to contain ice-rafted debris (IRD) from both LIS and EIS sources. The primary aim in the work of this thesis is to evaluate the methodology as a means of distinguishing IRD provenance. From the data obtained here it is possible to identify several magnetic events that correspond to the HEs and other layers of detrital material and which correlate well to previous standard petrological analyses performed on the same core materials. Magnetic signatures differ within the HEs, suggesting a changing balance of input from multiple sources as opposed to a single LIS source. The data suggest a phasing of these compositional differences through individual HEs. The potential of using environmental magnetic techniques in the identification of IRD provenance within marine sediments is discussed, as is the significance of the observed provenance variations within the cores studied.

published_or_final_version / Civil and Structural Engineering / Doctoral / Doctor of Philosophy

published_or_final_version / abstract / Earth Sciences / Master / Master of Philosophy