洪泽湖沉积物中重金属的污染测定及评价

摘要

This research selects Hongze Lake as object, and collected 17 sediment samples in 2008. In this paper,the total content of six kinds of heavy metals in the sediments （Cu, Cd, Pb, Zn, Ni, Cr） are mainly studied,and the heavy metal pollution conditons in the sediments are evaluated by using potential ecological risk index. The results show that：Cu, Ni, Zn, Pb, Cr pollution mainly distribute in the eastern and northern Lake District;Cd pollution is mainly in the western Lake District. Pb is the most serious pollution heavy metal in the whole Hongze Lake. Cu,Ni,Zn,Pb,and Cr have less ecological hazard potential （low risk） ,Cd has greater potential ecological risk （high risk） ,but its total potential ecological risk is low--risk,and also the contribution of Cd is largest （81%）.%选取洪泽湖为研究对象，于2008年采集洪泽湖沉积物样品17个，以沉积物中6种重金属（Cu、Cd、Pb、Zn、Ni、Cr）的总量为主要研究内容，运用潜在生态危害指教法对沉积物中的重金属污染状况进行了评价。结果表明：洪泽湖Cu、Ni、Zn、Pb、Cr污染的主要分布在东部和北部湖区，Cd污染主要在西部湖区。Pb是全湖污染最严重的重金属。Cu、Ni、Zn、Pb、Cr的潜在生态危害较小（低风险），Cd的潜在生态危害较大（高风险），总的潜在生态危害为低风险，Cd的影响最大（达到81％）。