Investigation And Ecological Effect For Typical Organic Pollutants In Water

When the pollution of organic chemicals in water body is becoming more and more serious, high attention has been paid to some investigation fields including the source of priority chemicals, their migration and biotransformation in the global environment, and their ecotoxicity influencing on animal, plant and human since 1980s. This paper concerns two important kinds of organic contaminants of Polychlorinated Organic Compounds and organic phosphate compounds with the background of the Yantse River in the Nanjing section. Detection method and contaminated level of pollutants, their migration and transformation, as well as their ecotoxicity effect were studied systemly in this dissertation.Chain's rapid economic growth, industrialization, and urbanization, accompanied by inadequate infrastructure investments and management capacity, have all contributed to the widespread problems of water scarcity and water pollution. One of the most widely used chemicals at the past was the Polychlorinated Organic Compounds (PCOCs), particularly the organochlorine pesticides and polychlorinated biphenyls. Although they were banned or restricted because of their toxicity, chronic persistence and bioaccumulation in the environment, they have moved from water into other media such as plant, fish, birds and marine mammals. They might ultimately pass onto people through consumption of traditional food. The Yangtse River is the longest river in China and the third longest in the world. Nanjing, the capital of Jiangsu, is situated on the lower reaches of the Yangtse River. The water in Yantse River is presently a sole resource for the production and drinking water. The determination of their residues in water samples is helpful to evaluate the safety of water body, to predict their distribution in other media, and to solve some environmental problems. In this study, 20 PCOCs from the water samples of the Yangtse River have been qualitatively and quantitatively analyzed. An improved method for the determination of PCOCs was investigated by using SPE and gas chromatography coupled with electron capture detection (GC/ECD). The use of SPE of C18-bonded silica coupled with GC/ECD provides a sensitive and reproducible method for the simultaneous determination of PCOCs in water. The results have been applied to evaluate the water quality and should be helpful for assessments of the impact of the organic components in the Yangtse-river. This survey illustrates the concentrations of most PCOCs are less than 10ng/L, far lower than 1ug/L of...