阳澄湖水源地健康风险评价及污染源分析

介绍饮用水水源受到重金属污染所致的健康危害的风险度计算模型，并应用于阳澄湖水源地饮水途径健康风险评价。在此基础上，选择阳澄西湖的下湖湾为研究对象，又进一步进行水源地重金属的来源分析，分别计算出重金属污染物经由河流汇入、底泥释放和大气沉降进入湖体的总量。结果表明：（1）基因毒物质镉所致健康风险为9．14E-06a^-1，并且远大于躯体毒物质所致的健康风险；（2）湖区工业是阳澄湖重金属的最大来源；（3）底泥释放也是一个重要的重金属输入方式。

Health Risk Assessment and Sources Analysis in Yangcheng Lake Water Resources

Some mathematical models for surface water quality health risk assessment is established to calculate risk values caused by heavy metals, and it is applied to assess the quality of water supply sources in Yangcheng lake. On this basis, the bottom bay of Yangcheng west lake is selected as the research object to conduct the further sources analysis of heavy metals, then the amount of heavy metals importing to lake via rivers, sediments release and atmospheric deposition. Results indicate that （ 1 ）The health risk caused by gene toxic substances Cd is 9. 14E -06a^-1 , and it is much more than the risk caused by non - gene toxic substances ; （2） Industry. is the largest heavy metals resource of the Yangcheng Lake ; （3） Sediment release of heavy metals is also an important input methods.