乌梁素海沉积物中重金属形态分布特征及污染状况评价  

Heavy metal speciation and pollution evaluation in the sediments of Wuliangsuhai Lake

作　　者：王爽[1] 李畅游[1] 史小红[1] 梁文[1] 张俊[1] 计亚丽[1] 

机构地区：[1]内蒙古农业大学水利与土木建筑工程学院,呼和浩特010018

出　　处：《环境化学》2012年第10期1555-1561,共7页Environmental Chemistry

基　　金：国家自然科学基金项目(40901262;50969005;51069007;51169017);校级创新团队资助

摘　　要：以乌梁素海沉积物中重金属为研究对象,对9个采样点的表层沉积物中Cu、Zn、Pb、Cd、Cr、Hg和As7种重金属总量和各形态进行了测定;并采用潜在生态危害评价方法对重金属总量和各形态进行污染评价.结果表明,重金属总量中Hg在全湖的潜在生态危害参数Eir(Eir=215.04)处于高潜在生态风险,全湖生态风险性综合指数RI为294.60,虽然处于中潜在生态风险,但是其值接近较高潜在生态风险.不同形态重金属中除残渣态(B4)以外,(B1+B2+B3)3种重金属形态之和在全湖的潜在生态风险性综合指数RI为122.34,处于低潜在生态风险,其中重金属Hg(Eir=92.20)的污染最为突出,应引起高度重视.The study area of this article is Wuliangsuhai Lake.The concentrations of 7 different kinds of heavy metal,which including Cu,Zn,Pb,Cd,Cr,Hg,As,and their different species in the surface sediments of 9 samplins sites have been studied.Total concentration and different species of heavy metals were evaluated by using potential ecological risk assessment method for pollution evaluation.The results showed that Hg processes high potential ecological risk in the lake sediment.The lake′s ecological risk composite index RI is 294.60,which is at the intermediate level of the potential ecological risk,but close to the high level.Except the residue B4,the RI value of the other three heavy metal species（B1＋B2＋B3） was 122.34,which is at the low level of potential ecological risk.The heavy metal of Hg with the highest level of pollution must be pay more attention.

关 键 词：乌梁素海 沉积物 重金属形态 评价 

分 类 号：X524[环境科学与工程—环境工程]