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闽西南某Pb异常区表层土壤重金属综合污染评价
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摘要
以福建省西南地区某Pb异常区土壤为研究对象,采集并测定了64个表层土壤样品中重金属Pb,As的含量,探讨了数学模型组合GIS软件在土壤重金属污染综合评价中的可靠性与有效性,采用模糊数学模型对各采样点土壤重金属污染状况进行综合评价,借助GIS软件通过加权插值对研究区土壤重金属污染状况进行整体预测和综合评价。结果表明:研究区表层土壤中重金属含量分布差别较大,重金属Pb平均含量显著高于国家土壤质量背景值,As平均含量显著高于福建省土壤质量背景值,说明研究区表层土壤已经出现了严重的重金属累积。模糊数学组合GIS软件评价结果表明研究区表层土壤重金属综合污染程度较高。
Taking a Pb soil anomaly area in southwest of Fujian, China as the research object, collected and measured the content of heavy metals Pb, As of 64 surface soil samples, explored the reliability and validity by mathematical model combined GIS software to evaluate the soil heavy metal comprehensive pollution,used the fuzzy mathematical model for evaluation of each sampling point on the heavy metal comprehensive pollution, with the aid of GIS software by weighted interpolation on the conditions of heavy metal contamination of soil in the study area are predicted overall and comprehensive evaluation. The results showed that the distribution of heavy metal content in surface soil of the study area was vary greatly, the average content of heavy metal Pb was significantly higher than that of the national soil quality background value, the average content of heavy metal As was significantly higher than that of the Fujian Province soil quality background value, indicating that the surface soil of the study area there have been serious heavy metal accumulation. Fuzzy mathematics combined GIS software evaluation results showed that the surface soil heavy metal comprehensive pollution degree was higher.
引文

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