曹妃甸围填海工程开发对近岸沉积物重金属的影响
Impact of the sea reclamation project in Caofeidian on the heavy metals contents in sediments
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摘要: 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:HgCdPbCuZn;各评价年度综合生态风险等级为较高。Abstract: Potential ecological risk and Geoaccumulation index were adopted by concentration of Cu、Pb、Zn、Cd、Hg in surface sediments which was obtained from 2004 to 2011 in order to investigate pollutants of heavy metals in Caofeidian. The results showed that the concentration of Cu、Pb、Zn、Cd、Hg in 2011 was higher than the background value in Bohai Bay.Hg was the main pollutant in surface sediments and the potential ecological risk index was in strong level. The results of the two evaluation methodswere basically in accordance and the pollution order was:HgCdPbCuZn.The ecological risk was in strong level.
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