| 水环境中的溶解有机质及其与金属离子的相互作用——荧光光谱学研究 | |
| Alternative Title | Dissolved Organic Matter in Natural Aquatic Environments and Its Complexation with Metal Ions: A study Based on Fluorescence Spectroscopy |
傅平青
| |
| 2004 | |
| Degree Grantor | 中国科学院地球化学研究所 |
| Place of Conferral | 中国科学院地球化学研究所 |
| Degree Name | 博士 |
| Degree Discipline | 地球化学 |
| Keyword | 溶解有机质 腐殖酸 富里酸 三维荧光光谱 同步荧光光谱 体积排阻色谱 荧光猝灭滴定 红枫湖 百花湖 洱海 沉积物孔隙水 太阳辐射 |
| Abstract | 本论文通过选择这一国际前沿科学领域,主要运用三维荧光光谱仪、紫外-可见分光光度仪、溶解有机碳/氮分析仪、高效体积排阻色谱、荧光猝灭滴定等分析化学方法和手段,对云贵高原湖泊红枫湖、百花湖、洱海沉积物孔隙水以及一些河流等当中的DOM及其水化学特征进行了深入细致的研究,并且运用三维激发发射荧光光谱研究DOM中不同组分与Hg的相互作用,在溶解有机质的化学结构及其与金属汞的相互作用机理等方面取得了一些进展. |
| Other Abstract | Dissolved organic matter (DOM), which is ubiquitous in almost all of the natural waters (e.g. sea and ocean, river, lake, bog water and ground water), was widely studied because of its significant role in shaping the aquatic environments since last decade. DOM influences a wide variety of physical, chemical and biological processes. Light absorption by DOM has a strong influence on the penetration of ultraviolet and photosynchetically active radiation. DOM mainly comprises organic acids and, therefore, affects pH of the waters and in some acidic waters acts as a buffer. The interactions between DOM and metal ions, organic pollutants influence their concentrations, transportation, toxicity and bioavailability. DOM acts as a large organic carbon reservoir exchanging with the atmosphere, where carbon (as CO2) plays as important role in climate regulation. All of these provide very good reasons for acquiring a better understanding of the origin, composition and structure features of DOM and the role it plays in geochemical processes. In this paper, analytical methods such as three-dimensional excitation emission matrix fluorescence spectroscopy (3DEEM), UV-Vis absorbance, and high performance size exclusion chromatography were selected to investigate the physical and chemical properties and seasonal variations of DOM in lake waters (Lake Hongfeng, Lake Baihua), lake sediment porewaters and DOM in Nanming River watershed. The complexation between DOM and metal ions were also investigated by using 3DEEM and fluorescence quenching titration. |
| Pages | 161 |
| Language | 中文 |
| Document Type | 学位论文 |
| Identifier | http://ir.gyig.ac.cn/handle/352002/3702 |
| Collection | 研究生_研究生_学位论文 环境地球化学国家重点实验室 |
| Recommended Citation GB/T 7714 | 傅平青. 水环境中的溶解有机质及其与金属离子的相互作用——荧光光谱学研究[D]. 中国科学院地球化学研究所. 中国科学院地球化学研究所,2004. |
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| LW013770.pdf（2482KB） | 暂不开放 | -- | Application Full Text | |||
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