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OALib Journal期刊
ISSN: 2333-9721
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武汉市郊区设施蔬菜地土壤重金属含量及其生态风险
DOI: 10.3724/SP.J.1145.2012.00582, PP. 582-585
Keywords: 设施蔬菜地土壤,重金属,污染评价,生态风险
Abstract:
采用野外调查采样和室内分析相结合的方法，对武汉市郊部分设施蔬菜地土壤5种重金属砷（as）、汞（hg）、铬（cr）、镉（cd）、铅（pb）的累积现状和潜在生态风险进行了分析评价.结果表明，研究区土壤中as、hg、cr、cd、pb的平均含量分别为0.06、0.15、19.85、1.07、5.44mg/kg，其中cd和hg的平均含量分别达到湖北省土壤背景值的9.41和2.36倍；设施蔬菜地土壤中不同重金属的单因子污染状况具有cd>hg>cr>pb>as的特征，就综合污染指数而言，cd元素是污染发生的主要贡献因子；从多种重金属潜在综合生态风险指数（ri）来看，研究区仅有18.23%的采样点达到中等生态风险，其余样点的潜在生态风险指数在轻微风险水平范围内.图4表3参15
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