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为了解曹妃甸工业区围填海工程开发对近岸沉积物重金属污染状况,对2004年~2011年8 a间4个航次的沉积物中5种重金属(Cu、Pb、Zn、Cd和Hg)的含量进行了研究,并分别采用地质累积指数法和潜在生态危害指数法对重金属污染程度及潜在生态危害进行了评价。结果表明:2011年曹妃甸工业区附近海域表层沉积物中5种重金属的平均含量均高于渤海湾沉积物重金属背景值,表层沉积物中Hg为主要污染元素,且具有较强的生态危害;Cu、Pb和Zn处于轻度污染状态;两种沉积物重金属污染评价方法的结果具有一致性,各重金属元素的污染程度顺序为:Hg>Cd>Pb>Cu>Zn;各评价年度综合生态风险等级为“较高”。
In order to understand the heavy metal pollution of coastal sediments in Caofeidian Industrial Area, five heavy metals (Cu, Pb, Zn, Cd and Hg) in the sediments of four voyages from 2004 to 2011 were analyzed Content were studied, and the method of Geological Cumulative Index and Potential Ecological Risk Index were respectively used to evaluate the degree of heavy metal pollution and potential ecological risk. The results showed that the average content of five heavy metals in the surface sediments near the Caofeidian Industrial Area in 2011 was higher than that of the Bohai Bay sediments, and Hg in the surface sediments was the main pollutant. Pb and Zn were slightly polluted. The results of two heavy metal pollution evaluation methods for sediment were consistent. The order of pollution of heavy metal elements was Hg> Cd> Pb> Cu> Zn. The comprehensive ecological risk level For “higher”.