郭村水库重金属分布及污染评价

Distribution of Heavy Metals and Pollution Assessment in Guocun Reservoir

2010年5月对郭村水库水体重金属含量进行研究,并应用均值综合污染指数法对研究区域重金属污染进行了评价。结果表明,Cr、Ni、Cu、Zn、Pb、Cd平均含量分别为0.103、0.046、0.340、0.152、0.087、0.008 mg/L。重金属超标倍数以Cu最大,为32.99倍,Pb次之,为1.24倍,Cr、Ni、Zn、Cd超标倍数均不超过1。重金属超标率表现为Cu、Zn最大,分别为100%、90%;Cd、Cr、Ni、Pb超标率相对较小,分别为40%、30%、30%、30%。对污染分担率进行统计,发现Cu为主要污染元素。应用均值型综合污染指数法对重金属污染进行评价,结果表明,郭村水库属于重度污染水平。

On May 2010,the content of heavy metals in Guocun reservoir was studied,and then the comprehensive pollution index was adopted to evaluate the heavy metal pollution in the study area.As indicated by the results,the average contents of Cr,Ni,Cu,Zn,Pb and Cd were 0.103,0.046,0.340,0.152,0.087 and 0.008 mg/L respectively.Over standard multiples of Cu was the biggest with 32.99,followed by Pb with 1.24,that of Cr,Ni,Zn and Cd all below 1.Over standard rates of heavy metals of Cu and Zn were the biggest of 100% and 90%,while that of Cd,Cr,Ni and Pb were relative small with 40%,30%,30% and 30%.Pollution share rate analysis showed that Cu was the main pollution element.Average comprehensive pollution index was used to evaluate heavy metal pollution,and the results showed that Guocun reservoir was seriously polluted.