外秦淮河疏浚后底泥重金属污染与潜在生态风险评价

简要介绍了Hakanson的生态风险指数法，用该法对疏浚后外秦淮河南京市区段丰水期和枯水期采集的13处底泥样品进行分析，评价重金属对水域的污染程度及其对水域造成的潜在生态风险影响。结果表明，除清凉门大桥污染程度和潜在风险略高外，外秦淮河其他市区段底泥重金属污染程度及其对水域造成的潜在生态风险较低；疏浚后外秦淮河底泥中的重金属在短期内得到控制，一段时间后重金属污染仍然存在。对有效磷与重金属污染物之间的关系作相关分析，其中有效磷和全量铅之间的线性相关系数0963 5，说明磷与铅具有同源性。

POLLUTION AND POTENTIAL ECOLOGICAL RISK ASSESSMENT OF HEAVY METAL IN SEDIMERT OF QINHUAI RIVER

Qinhuai River,a famous river across Nanjing City and running the local ancient culture,plays a great role in the geography,water environment and urban development of Nanjing City.The Hakanson's ec- ological risk index method is briefly introduced and applied to assess the potential ecological risk of the Qinhuai River.The concentrations of copper,zinc and lead in sediment samples collected from Qinhuai Riv- er are analyzed.It is concluded that the degree of contamination and the potential ecological risk of Qinhuai River are low except for those of Qinliangmen River which are moderate.The risk degree in high-water sea- son is higher than the degree in the low-water period commonly after sediment-dredging.The correlative characteristics between available phosphorus and other pollutants are also analyzed.The highly significant correlation with 0.963 5 of correlation coefficient between available phosphorus and lead indicates that a- vailable phosphorus and lead might have the same sources.