岚山港海洋临时倾倒区表层沉积物重金属污染、潜在生态风险评价及变化趋势分析

摘要

Based on the monitoring data of the heavy metals in September 2009, the pollution status and the potential ecological risk of the heavy metals in Lanshan Port Temporary Ocean Dumping Site were studied by using the Hakanson ecological risk index, and the variation trend of ERI was analyzed. The results showed that the integrated contamination level and the potential ecological risk of the heavy metals were low in the surface sediments of Lanshan Port Temporary Ocean Dumping Site. The Cd and Hg were key factors of the potential ecological risk in dumping site.The variation trends of ERI showed the order of ecological risk degree was 2006＞2009＞20042008＞2000, In 2009, it was higher than that of 2008, and the Eri of Cd and Hg had a larger increase.%根据2009年9月岚山港海洋临时倾倒区海域表层沉积物重金属监测数据,采用Hakanson生态风险指数法对其重金属污染特征,潜在生态风险性进行了评价,并对其变化趋势进行了分析,结果表明:该倾倒区海域重金属综合污染程度和潜在生态风险性均较低,倾倒区主要潜在生态风险因子为Cd和Hg.潜在生态风险指数(ERI)表明该倾倒区的生态风险程度顺序为:2006年＞2009年＞2004年＞2008年＞2000年,与2008年相比,2009年潜在生态风险指数(ERI)有所增加,其中重金属Cd和Hg的潜在生态风险系数(Eir)有较大增加.