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利用单因子评价法和潜在生态风险指数法对连云港倾倒区沉积物重金属污染现状及其潜在生态风险进行评价。结果显示,2011年至2012年连云港倾倒区表层沉积物重金属含量满足当前海洋功能区需求;重金属As、Zn和Cr存在富集现象,重金属的潜在生态风险指数大小依次为Cd>As>Hg>Cu>Pb>Cr>Zn,除近岸局部海域外大部分海域处于低等风险。重金属潜在生态风险主要来源于陆源输入,倾倒活动影响相对较小。
The single factor evaluation and potential ecological risk index were used to evaluate the status of heavy metal pollution in sediments and potential ecological risk in Lianyungang dumping area. The results showed that the contents of heavy metals in the surface sediments of Lianyungang dumping area met the current needs of marine functional areas from 2011 to 2012. As, Zn and Cr in heavy metals were enriched, and the potential ecological risk indices of heavy metals were Cd> As> Hg> Cu > Pb> Cr> Zn, with the lowest risk except most of the coastal waters. The potential ecological risk of heavy metals is mainly due to the input of terrestrial sources, and the impact of dumping activities is relatively small.