北京西城区雨水管道沉积物中重金属污染风险评价

Assessment on the pollution risk of heavy metal in the storm sewer sediments in Xicheng District,Beijing

采用地累积指数法、次生相与原生相分布比值法以及Hakanson潜在生态风险指数法从不同角度对雨水管道沉积物中重金属的污染风险进行了评价。地累积指数法的评价结果表明,不同重金属的污染级别为Zn>Cu>Cd>Cr>Pb>Ni。而次生相与原生相分布比值法以及Hakanson潜在生态风险指数法的评价结果表明,不同重金属的潜在污染效应关系和潜在生态危害系数大致排序均为Cd>Cu>Zn>Pb>Ni>Cr。

The potential pollution risks of heavy metal in the storm sewer sediments in Xicheng District of Bei- jing were evaluated by three methods of geological acumination index （Igeo）, ratio of secondary phase and primary phase （RSP） and the potential ecological index （PER）. The assessment results of Igeo method showed that the con- tamination degree of 6 heavy metals follow the sequence of Zn〉cu〉cd〉cr〉Pb〉Ni, and the results assessed by RSP and PER methods reveal that the order of potential contamination risk and potential ecological index of 6 heavy metals was Cd〉cu〉zn〉Pb〉Ni〉Cr.