To comprehensively evaluate and analyze the heavy metal pollution status and potential eco-logical risks in the sediments of the Shahe River,six representative sampling sites were selected.Through field investigation,sample collection,and laboratory analysis,the heavy metal elements such as mercury(Hg),cadmium(Cd),zinc(Zn),copper(Cu),lead(Pb),and arsenic(As)in the sediment were determined.The geo accumulation index method and potential ecological risk index method were introduced to assess the degree of pollution and ecological risks.The results showed that the content of heavy metals in the sediments of the Shahe River gradually decreased from upstream to downstream,with the main polluting elements being Hg,Cd,and Zn.The geo-accumulation index analysis indicated that Hg showed moderate pollution level in the upstream area,while other heavy metals such as Cu,Pb,and As showed no significant pollution.The potential ecological risk index a-nalysis indicated that the ecological risk in the upstream area of the Shahe River was higher than that in the downstream area,especially at site G1,where the potential ecological risk index of heavy metals was much higher than those of other sites,which was related to the high content and high toxicity of Hg.
关键词
底质沉积物/重金属污染/地质累积指数/潜在生态风险
Key words
sediment/heavy metal pollution/geo-accumulation index/potential ecological risk
维普
万方数据