| 摘要: |
| 为明确钢铁企业周边土壤的污染程度及污染风险, 以福建省某钢铁企业为例, 采用系统布点
法并结合大气沉降范围和地形等因素, 共布点 23 个, 其中在距企业边界 50 m 内布点 5 个 (记空间距离为
50 m), 在边界外大气沉降范围内距企业边界约 500 m 处布点 15 个 (记空间距离为 500 m), 在大气沉降
范围外距企业边界约 1 000 m 处布对照样点 3 个 (记空间距离为 1 000 m), 测定土壤中镉 (Cd)、 汞
(Hg)、 砷 (As)、 铅 (Pb)、 铬 (Cr)、 铜 (Cu)、 镍 (Ni)、 锌 (Zn) 共 8 种重金属含量, 并采用单因
子指数法、 内梅罗综合指数法对土壤环境进行了评价。 结果表明, 50 和 500 m 处土壤的 As、 Cd、 Cr、
Cu、 Hg、 Ni、 Pb、 Zn 含量均超过福建省土壤背景值。 评价结果表明, 距钢铁企业边界 50 和 500 m 处,
内梅罗综合指数分别为 20. 47、 24. 85, 为重污染, Cd 和 Zn 单因子指数均大于 1, 为重污染, 表明钢铁企
业周边土壤受到污染。 |
| 关键词: 钢铁企业 土壤 重金属含量 |
| DOI： |
| 分类号: |
| 基金项目: |
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| Heavy Metal Pollution Characteristics and Risk Assessment of Soil Surrounding A Steel Enterprise |
|
Yuzhengxing
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Sanming Min environmental protection investment Co.. LTD
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| Abstract: |
| To clarify the pollution situation and risks of soil surrounding the iron and steel enterprise, taking a steel enterprise in Fujian province as an example, a systematic point distribution method was adopted,
combined with factors such as atmospheric deposition range and terrain, with a total of 23 points distributed. Among them, 5 points were distributed within 50 meters of the enterprise boundary (with a spatial distance of 50
m), 15 points were distributed about 500 meters away from the enterprise boundary within the atmospheric deposition range outside the boundary (with a spatial distance of 500 m), and 3 control points were distributed about 1000 m away from the enterprise boundary outside the atmospheric deposition range (with a spatial distance
of 1 000 m) to determine the content of 8 heavy metals, including cadmium Cd, mercury Hg, arsenic As,
lead Pb, chromium Cr, copper Cu, nickel Ni, and zinc Zn, in the soil. The single factor index method and
Nemerow comprehensive index method were used to evaluate the soil environment. The results showed that the
content of 8 heavy metals, including As, Cd, Cr, Cu, Hg, Ni, Pb, and Zn, at 50 and 500 m exceeded the
background values. The evaluation results showed that the Mero comprehensive index at 50 and 500 m of the
steel enterprise was 20. 47 and 24. 85, respectively, indicating heavy pollution. The single factor index of Cd and Zn was greater than 1, indicating that the soil around the steel enterprise was polluted. |
| Key words: iron and steel enterprises soil heavy metal content |
