土壤中重金属累积特征及生态风险评价——以乌拉特后旗有色金属冶炼企业集中区为例
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巴彦淖尔市环境科学研究所,巴彦淖尔市环境科学研究所,山西大学环境与资源学院

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X82

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巴彦淖尔市重金属专项研究项目资助。


Evaluation on Heavy Metal Contamination and It’S Potential Ecological Risk in Soil: A Case Study of Nonferrous Metal Smelting Zone in Wulatehouqi
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Institute of environmental science of Bayannur,Institute of environmental science of Bayannur,College of Environmental Science and Resources,Shanxi University

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    摘要:

    在内蒙古乌拉特后旗有色金属冶炼企业集中区域内土壤中测定了7种重金属元素的含量,利用地统计学方法、地累积指数法及Hankanson指数法研究了土壤中重金属元素的空间变异特征及成因,综合评价了重金属环境风险。结果表明:研究区内重金属元素含量已经很大程度上受到了工业、农业生产活动的影响,结构性因素的影响已经不显著;重金属元素的地累积指数均值排列顺序为Cd>Zn>Pb>Cu>As>Hg>Cr,100% 的土壤样本表现出极强的Cd污染程度,7种重金属的潜在生态风险由强至弱依次为:Cd>Cu>Pb>As>Zn>Hg>Cr,研究区土壤总体处于轻微风险程度;研究区重金属含量的累积成因各有不同,总体来说由区域的有色金属冶炼、城镇交通运输、燃煤和耕地区域内的污水灌溉及农业施肥等导致。

    Abstract:

    The concentrations of 7 heavy metals in soil in the nonferrous smelting area in Wulatehouqi, Inner Mongolia Autonomous Region were determined. The spatial variability, potential sources, and ecological risk of heavy metals were analyzed using geostatisticals, geoaccumulation index, and potential ecological risk index. The results indicated that: 1) the concentration and distribution of 7 heavy metals in soil of this area were mainly influenced by human activities, and the effects of soil forming factors were not significant; 2) the geoaccumulation index for these metals followed the order: Cd>Zn>Pb>Cu>As> Hg>Cr, and the potential ecological risk index followed the order: Cd>Cu>Pb>As>Zn>Hg>Cr. All soil samples were significantly polluted by Cd; 3) the comprehensive ecological risk was at a relatively low level. The potential pollution sources were nonferrous metal mining and smelting, transportation, coal combustion, and irrigation with sewage.

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岳 荣,史 锐,张 红.土壤中重金属累积特征及生态风险评价——以乌拉特后旗有色金属冶炼企业集中区为例[J].土壤,2016,48(2):314-321. YUE Rong, SHI Rui, ZHANG Hong. Evaluation on Heavy Metal Contamination and It’S Potential Ecological Risk in Soil: A Case Study of Nonferrous Metal Smelting Zone in Wulatehouqi[J]. Soils,2016,48(2):314-321

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历史
  • 收稿日期:2015-07-31
  • 最后修改日期:2015-08-31
  • 录用日期:2015-11-02
  • 在线发布日期: 2016-04-01
  • 出版日期: 2016-04-25