应用地质累积指数评价南昌市城市污泥重金属污染

Application of Index of Geoaccumulation (I_(geo)) in Evaluation of Heavy Metals Pollution in Municipal Sludge from Nanchang

应用地质累积指数对南昌市城市污泥(包括污水处理厂污泥和纸厂废水处理污泥)的重金属污染进行了分析评价。结果表明,城市污泥重金属中Pb、Cr按地质累积指数分级均为0,属无污染;As地质累积指数为0～1之间,表现为无污染～中度污染;青山湖污水处理厂污泥主要的重金属污染元素为Cd、Hg、Cu、Zn,其平均的地质累积指数为2～4,表现为中度污染～强污染。

Pollution of heavy metals in geoaccumulation, including the sewage municipal sludge from Nanchang was evaluated with the index of sludge from the sewage treatment plant of qingshan lake and waster treatment of chengming paper mill. The results showed that classifications of Pb and Cr in municipal sludge by the index of geoaccumulations （Igeo ） were all 0, belonging to the pollution - free. Meanwhile, those of As were mostly between 0 and 1, belonging to the pollution - free and the medium polluted. The main elements caused Qcss pollution was Cd, Hg, Cu, Zn, which average Igeo were from 2 to 4, belonging to the medium polluted and the strong polluted.