秦皇岛石河口海域沉积物重金属污染及生态风险评价

为了研究石河口海域的沉积物环境,于2009年9月对石河口海域表层沉积物的Cu、Pd、Zn、Cd、Hg、As含量进行了测定,探讨了重金属含量的分布特征和相关关系,采用地累积指数法和潜在生态风险指数法对重金属的富集程度和潜在生态风险进行了评价。结果表明:Cu和Pd、Cu和Cd、Pd和Cd之间存在显著正相关性。重金属富集程度排序为CdHgCuZnPdAs。石河口海域多种重金属潜在生态风险指数属于轻微风险状态。重金属潜在生态风险指数排序为CdHgPdCuAsZn,Cd的生态风险指数属中度风险状态,研究区域在一定程度上受到了Cd的污染。

Pollution of Heavy Metals in the Surface Sediments and Potential Ecological Risk from Shihe Rivers in Qinhuangdao

The contents of Cu, Pb, Zn, Cd, Hg in the surface sediments samples in Qinhuangdao Shihe River were measured, in September of 2009. The correlation coefficient and distributed characteristics of heavy metal contents were discussed, The environmental risk was evaluated by using such methods as Sediment Enrichment Factors and Hakanson Potential Ecological Risk Index. The results shows: there is a positive correlation between Cu and Pd, Cu and Cd, Pd and Cd. The order of enrichment of heavy metals: Cd>Hg>Cu>Zn>Pd>As. The potential ecological risk index of heavy metals is a minor risk status.The order of potential ecological risk factor was Cd>Hg>Pd>Cu>As>Zn, Ecological risk factor of Cd is a moderate risk status, The results shows:the investigation area was some extent polluted by Cd.