新疆准东煤矿土壤重金属污染方法评价与分析

    The method of evaluation and analysis of heavy mental pollution of soil in Xinjiang Zhundong surface coal mine

    • 摘要: 为对新疆准东煤矿土壤重金属污染情况作出客观实际的评价,借助单因子、综合污染、内梅罗等污染指数法,并结合GIS对耕地土壤重金属空间分布、重金属富集特征及综合污染情况进行分析。对矿区土壤表层中的Hg、As、Cu、Ni、Cr、K、Pb、Zn(0~30cm)进行综合污染评价,结果表明:单因子污染评价表明Ni、Cr、Pb分别在0~10cm、10~20cm、20~30cm土层中为轻度污染,各土层其余元素评价为清洁;Hg在0-10cm、10-20cm土层中污染值跨度最大,且最大值达到重度污染。内梅罗污染评价认为Hg、As、K元素每层均为重度污染,其他元素污染程度较轻,每层污染程度较相似。综合污染评价指出0~10cm、10~20cm土层污染程度为清洁,20~30cm土层为轻度污染。本研究区污染最严重的区域位于五彩湾煤矿(研究区西北部),有许多污染物在这一片区被堆积进而沉淀,而将军庙煤矿(研究区东南部)污染程度较轻。本研究为因地制宜地制定土壤污染治理措施,具有十分重要的现实意义。

       

      Abstract: To assess pollution status of heavy metals in arable soils in area of Xinjiang Zhundong surface coal mine,this paper studied the pollution status of heavy metals including as Hg、As、Cu、Ni、Cr、K、Pb、Zn(0~30cm) comprehensively and respectively,using methods of single factor index,comprehensive pollution and Nemero index.The pollution status of heavy metals in arable soils in this area was analyzed using this model considering spatial distribution of soil heavy metals,accumulation characteristics of heavy metal in crops,and comprehensive pollution analysis based on GIS.The results showed that the single factor index of heavy metals in soil indicates that in the three soil surface Ni、Cr、Zn are the slight pollution,evaluation of the remaining elements are clean;Hg in 0~10cm,10~20cm soil pollution largest span value,and the maximum reached heavy pollution.Nemerow comprehensive pollution index assessment that the Hg,As,K element layers belong to the severe pollution,other elements of a lesser degree of pollution,each pollution levels were similar.Comprehensive pollution evaluation noted 0~10cm,10~20cm soil contamination clean,20~30cm soil is light pollution.The study area is located in the heavy pollution areas Wucaiwan coalmine(research northwestern district),there are so many pollutants in this area is stacked further precipitation,while Jiangjunmiao coalmine(southeast of the study area) contamination to a lesser extent.This study local conditions to develop soil pollution control measures,have a very important practical significance.

       

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