宿州市近郊农田土壤重金属空间分布与污染评价

对宿州市近郊农田土壤中4种重金属元素Cu、Pb、Zn和As的含量、空间分布及来源状况进行了分析,并采用综合指数法对其农田土壤重金属污染水平进行了评价。结果发现:宿州市近郊农田土壤中Cu、Pb、Zn的平均含量低于安徽省土壤背景值,As高于背景值;Pb和Zn的含量空间分布受交通污染源的影响,Cu与生活垃圾及废弃物的排放有关,As则来源于农药产品的使用;近郊农田土壤重金属为轻污染水平,以As污染最严重。

Spatial distribution and assessment of soil heavy metals in suburb cropland soil of Suzhou

In this paper, concentrations, spatial distribution and source of four heavy metals （Cu, Pb, Zn, As） in cropland soil from suburb area of Suzhou city were determined and analysed by X-Ray fluorescence spectrometer, interpolation analysis, correlation analysis and cluster analysis. Then based on integrated pollution index （IPI）, pollution levels of the heavy metals were assessed. The results indicated that the mean concentrations of As here was higher than that of the value of Anhui soil background, while the others were lower; Spatial distribution of Pb and Zn was affected by traffic pollution, Cu was related with the inappropriate disposal of garbage and waste, As was came from the use of pesticides; The IPI of heavy metals belonged to light pollution levels, and As was higher than the others.