[Distribution characteristic and assessment of soil heavy metal pollution in the iron mining of Baotou in Inner Mongolia].
[Distribution characteristic and assessment of soil heavy metal pollution in the iron mining of Baotou in Inner Mongolia].
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发表时间：
2011-10
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通讯作者：
Wei Guo;Ren-xin Zhao;Jun Zhang;Yuxin Bao;Hong Wang;Ming Yang;Xiaoli Sun;Fan Jin
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作者：
Wei Guo;Ren-xin Zhao;Jun Zhang;Yuxin Bao;Hong Wang;Ming Yang;Xiaoli Sun;Fan Jin
分析了位于内蒙古草原生态系统中的包头尾矿库和巴彦鄂博铁矿开采区周边土壤重金属污染现状及总量。研究目的：为草原矿区土壤重金属污染防治提供基础资料。结果表明，尾矿库不同方向的土壤均受到Pb、Cu、Zn、Mn的污染。单因子污染指数为Mn > Zn > Pb > Cu。根据内梅罗综合污染指数，尾矿库东北部、东南部、西南部和西北部的内梅罗综合污染指数分别为2.43、10.2、1.88、1.64。由于西北风的主导作用，东南方向土壤重金属污染最严重。尾矿库周边50 m范围内，除Cu外，其它重金属污染最严重。巴彦鄂博铁矿区土壤单因子污染指数表明，6个调查区土壤均受到Pb、Cu、Zn、Mn的污染。综合污染指数表明，矿区、排土场、排土场外、城区外、铁路东、西6个区域的综合污染指数分别为14.3、4.30、2.69、3.41、2.88、2.20。矿区土壤污染程度最高。此外，矿石的运输还造成了沿着土壤重金属污染。总体而言，两个研究区土壤具有相似的污染特征，重金属污染元素与尾矿浓度具有对应性。土壤重金属对草地生态系统的健康和稳定构成威胁。
The pollution status and total concentration of soil heavy metals were analyzed around tailing reservoir of Baotou and iron mining of Bayan Obo located in Inner Mongolia grassland ecosystem. Aim of the study is to control soil heavy metal pollution of grassland mining area and provide the basic information. The results indicated that the soils from different directions of the tailing reservoir were contaminated by Pb, Cu, Zn and Mn. According to the single factor pollution index, the pollution degree was Mn > Zn > Pb > Cu. According to Nemerow integrated pollution index, the indexes of the northeast, southeast, southwest, and northwest of the tailing reservoir, were 2.43, 10.2, 1.88, 1.64. Soils from the southeast had the most serious heavy metal contamination because of the dominant wind of northwest. Within 50 m from the edge of tailing reservoir, heavy metal contamination was most serious except Cu. With regard to Bayan Obo iron mining, the single factor pollution index indicated that the soils from the six surveyed regions were contaminated by Pb, Cu, Zn and Mn. The integrated pollution index indicated that the indexes of the six regions, such as the mining area, the dump, outside the dump, outside the urban area, east region of the railway, and west region of the railway, were 14.3, 4.30, 2.69, 3.41, 2.88, and 2.20, respectively. The soil pollution degree of the mining area was the highest. Additionally, the transport of ore resulted in soil heavy metal pollution along railway. In general, soils of the two studied areas had the similar pollution characteristic, and the elements of heavy metal contamination were corresponding with the concentrations of tailings. The health and stabilization of grassland ecosystem are being threatened by soil heavy metals.