连云港近岸海域表层沉积物中重金属污染及其潜在生态危害

Heavy metals pollution and potential ecological risk in sediment of Lianyungang sea area

分三个区域全面分析了连云港近岸海域沉积物中主要重金属的空间分布特征,并采用Haknson潜在生态危害系数与生态危害指数法对重金属的潜在危害进行了研究。结果表明:该海域重金属的潜在生态危害系数属于轻微生态危害,产生潜在生态危害的主要重金属是As;Cd、Cu次之;Pb、Hg最弱;多种重金属的潜在生态危害指数属于轻微生态危害,三个区域潜在生态危害程度由大到小的次序为:碱厂区域>港口区域>核电区域。

The characteristics of spatial distribution of the heavy metals in surface sediments of Lianyungang sea area in Jangsu Province were studied. The potential ecological risk for the heavy metals were analyzed and assessed by the method of potential ecological risk indices presented by H knson, The results shown that the concentration factor in the surface sediments of Lianyungang is light and mian factors caused the ecological risk are As, following Cd, Cu, and Pb, Hg. The contamination level in the surface sediments is light, and is more serious in Soda Ash factory district than in Lianyungang Port district and Nuclear Power Station district.