三亚湾表层沉积物中重金属污染特征及生态风险评价

摘要

Six heavy metals in ten surface sediment samples from Sanya Bay were analyzed and the degree of contamination and potential ecological risks were assessed by using potential ecological index methods.The results showed that the order of average heavy metal concentration of was Zn〉Pb〉Cu〉As〉Cd〉Hg.Every heavy metal in ten samples reached the pollution standard.The average degree of contamination was Pb〉Zn〉Cu〉As〉Hg〉Cd.The degree of integrated contamination index of six heavy metals was slightly polluted.The order of potential ecological risk level was Hg〉Pb〉Cd〉Cu=As〉Zn.The potential ecological risk level of the monitored area is slightly risky.%对三亚湾10个表层沉积物中的6种重金属元素进行分析,并运用潜在生态危害指数法对重金属的污染程度和潜在生态风险程度进行了评价。研究结果表明：表层沉积物中6种重金属平均含量高低依次为Zn〉Pb〉Cu〉As〉Cd〉Hg。10个站位单个重金属都处于低污染水平,重金属平均污染程度由大到小依次为Pb〉Zn〉Cu〉As〉Hg〉Cd;研究区域多种重金属综合污染程度均属于低污染。6种重金属生态危害程度大小是Hg〉Pb〉Cd〉Cu=As〉Zn;监测海域的总体潜在生态风险程度低。