辽宁太子河沉积物重金属污染及潜在生态危害评价

Heavy Metals in Sediments of Taizi River in Liaoning:Pollution Situation and Potential Ecological Risk

为全面了解辽宁太子河底泥沉积物中重金属的污染特征,测试了太子河表层沉积物中重金属元素铜、铅、镉和锌的含量,并采用地积累指数法和潜在生态危害指数法评价了沉积物中重金属污染及其潜在生态危害程度。结果表明,辽宁太子河底泥沉积物中各种重金属元素的污染程度由强至弱依次为:Cd>Zn≥Cu>Pb;金属污染构成的潜在生态危害由强至弱依次为:Cd>Cu≈Zn>Pb,其中Cd的影响占绝对主导地位。

Samples were taken from the top-layer of sediment of Taizi River in Liaoning Province in order to measure and evaluate the pollution of heavy metals such as Cu,Pb,Cd and Zn in the river sediment.The geo-accumulation and potential ecological risk indices were employed in the evaluations relating to pollution levels and eco-risk.Results indicated that pollution level in so far as the above-mentioned four metals in descending order was CdZn≥CuPb;and potential eco-risk intensity in descending order was CdCu≈ZnPb.Consequently,cadmium was the primary among the heavy metals polluting Taizi River.