关中东部农业土壤重金属分布特征与污染评价——以富平县为例  

Distribution characteristics and pollution assessment of heavy metals in agricultural soil of eastern Guanzhong——A case study of Fuping County

作　　者：胡明[1] 

机构地区：[1]渭南师范学院化学与生命科学学院,陕西渭南714000

出　　处：《甘肃农业大学学报》2013年第3期99-104,共6页Journal of Gansu Agricultural University

基　　金：国家自然科学基金"秦岭太白山地区降水化学及其环境意义"(41171061);渭南市科技计划项目"渭南市水土保持的水环境效应分析"(2011KYJ-7)

摘　　要：为了解关中东部地区富平县农业土壤重金属污染及分布现状,采集了25处农业表层土壤,研究农田土壤中Zn、Pb、Cr、Cu、Mn的累积与污染情况,以单因子污染指数法、内梅罗综合污染指数法对其污染现状进行评价,并采用Arcgis 9.3软件绘制重金属污染分布图.结果表明:富平县农业土壤中Cr、Cu的污染情况较严重,且全部为重度和中度污染,其中重度污染的样点分别占总采样点的76%和40%;Pb处于轻度污染,空间分布较均匀;Zn、Mn的污染程度较低.从综合污染指数来看,研究区内东南部及西北偏东部污染最严重,西南、东北部污染相对较轻,农业土壤重金属污染整体处于中度污染水平.In order to understand the distribution characteristics and pollution of heavy metals in agricultural soil of eastern Guanzhong, the concentrations of Zn, Pb, Cr, Cu, and Mn in 25 topsoil samples collected from the agricultural soil in Fuping County were determined. The pollution situation was evaluated by the single-factor pollution index method and Nemerow comprehensive pollution index method, and the heavy metal pollution distribution map was drawn by Arcgis 9.3 software. The results showed that Cr and Cu pollution were both serious,all pollution was heavy pollution and moderate pollution, Cr and Cu heavy pollution samples was 76 %,40 % respectively in totel samples. Pb was light pollution, Zn and Mn pollution were both lighter. From the view of comprehensive pollution index, heavy metal pollution of agricultural soil was in moderate level in research area. Thus, appropriate measures should be adopted to strengthen the prevention and control of pollution in the region and avoid the harm to human health.

关 键 词：土壤重金属 空间分布特征 污染评价 富平县 

分 类 号：X53[环境科学与工程—环境工程]