Evaluation Of Pollution And Fate Of Mercury In Water Column Of Chonging District And Three Gorges Reservoir Region After Impoundment

Mercury is one of the most toxic heavy metals in the environment, and its negative impact on human and animal health aroused worldwide concern after the Minamata disease occurred in Japan during the early 1950s. Three Gorges Reservoir is the largest water conservancy vital point large-scale integrated hinge project in the world. But it is situated on the area of more mercury in soil, and mercury pollution brought by dam building has become an active field of research by scientists engaged in relevant subject. After impoundment, the environmental conditions, such as the velocity of water flow, the sedimentation rate of suspended substance, will be changed greatly. So the fate of mercury in water will be changed. In this paper, the transport and distribution are studied in water from Three Gorges Reservoir and Jialing River. The major contents are described as follows:1. Study on determination of sub-part-per-billion level of mercury in water sample by hydride-generation cold atomic spectroscopy with sulfhydryl cottonThe absorption of sulfhydryl cotton was highly selective and was effectively used to separate mercury in water. Trace mercury was determined by flow injection hydride-generation atomic absorption spectroscopy. The method was easy to perform, low-cost and highly selective. The paper...