福建漳州菜园土壤重金属污染评价及防治

调查福建省漳州市菜园土壤重金属Cd、Pb、Hg、Cr及非金属有害元素As含量,并采用单项污染指数法和综合污染指数法进行评价。结果表明,以福建土壤背景值为评价标准,漳州市部分菜园土壤受到重金属污染,单项污染指数的顺序为Cd(2.39) >Hg(2.00) >Pb(1.40) >Cr(0.63) >As(0.57),污染元素主要为Cd、Pb、Hg,其中Cd、Hg为中度污染;综合污染指数为1.75,属轻度污染。而以土壤环境质量二级标准为评价标准,其综合污染指数为0.14,污染等级为未受污染。

Evaluation of Heavy Metal Contamination in Vegetable Soils of Zhangzhou, Fujian Province

The contents of heavy metals as Cd,Pb,Hg,Cr and As in vegetable soils of Zhangzhou were investigated and the heavy metal contamination was evaluated by taking the ways of single pollution index and complex pollution index.It showed that,by taking the background value of soil of Fujian as the evaluation standard,soils of some vegetable lands of Zhangzhou were polluted by heavy metals with a pollution order of single pollution index as Cd(2.39)>Hg(2.00)>Pb(1.40)> Cr(0.63)>As(0.57) and the main pollution elements were Cd,Pb and Hg of which the pollution of Cd and Hg ranked medium grade,meanwhile the complex pollution index was 1.75 which ranked light grade.By taking the second grade standard of soil environmental quality as the evaluation standard,the complex pollution index was 0.14,belonging to non-pollution grade.