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丹江口水库新增淹没区农田土壤重金属生态危害评价

王 剑 尹 炜 强小燕 朱 惇 史志华

王 剑, 尹 炜, 强小燕, 朱 惇, 史志华. 丹江口水库新增淹没区农田土壤重金属生态危害评价[J]. 环境科学研究, 2015, 28(4): 568-574.
引用本文: 王 剑, 尹 炜, 强小燕, 朱 惇, 史志华. 丹江口水库新增淹没区农田土壤重金属生态危害评价[J]. 环境科学研究, 2015, 28(4): 568-574.
WANG Jian, YIN Wei, QIANG Xiaoyan, ZHU Dun, SHI Zhihua. Ecological Risk Assessment of Heavy Metals in Farmland Soil from New Submerged Area around Danjiangkou Reservoir[J]. Research of Environmental Sciences, 2015, 28(4): 568-574.
Citation: WANG Jian, YIN Wei, QIANG Xiaoyan, ZHU Dun, SHI Zhihua. Ecological Risk Assessment of Heavy Metals in Farmland Soil from New Submerged Area around Danjiangkou Reservoir[J]. Research of Environmental Sciences, 2015, 28(4): 568-574.

丹江口水库新增淹没区农田土壤重金属生态危害评价

基金项目: 国家自然科学基金项目(41101250)

Ecological Risk Assessment of Heavy Metals in Farmland Soil from New Submerged Area around Danjiangkou Reservoir

  • 摘要: 为研究丹江口水库新增淹没区农田土壤重金属污染状况,通过野外调查,采集169个土壤样品,分析了土壤中7种重金属(Cr、Cd、Pb、Ni、Zn、Cu、As)的污染特征和空间分布,并采用Igeo(地质累积指数)法对土壤重金属进行生态危害评价. 结果表明:w(Cr)低于河南省土壤环境背景值,w(Cd)、w(Pb)、w(Ni)、w(Cu)、w(As)、w(Zn)均高于河南省土壤环境背景值,其中,w(Cr)比河南省土壤环境背景值低18.90 mg/kg,w(Zn)比河南省土壤环境背景值高11.21 mg/kg,w(Cd)则为河南省土壤环境背景值的16倍. 空间分析表明,河南省淅川县、湖北省丹江口市附近的库区以及河南省九重镇、盛湾镇库周的土壤重金属质量分数较高,而其余区域较低;Igeo法评价结果表明,Cd是丹江口水库新增淹没区主要的污染元素,Cr、Pb、Ni、Zn、Cu、As则处于无污染水平.

     

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