| 李乔,王淑芬,曹有智,王卫,洪成林.准东煤田周边农田土壤重金属污染生态风险评估与来源分析[J].农业环境科学学报,2017,36(8):1537-1543. |
| 准东煤田周边农田土壤重金属污染生态风险评估与来源分析 |
| Ecological risk assessment and source analysis of heavy-metal pollution in farmland soils surrounding the coal mine of East Junggar Basin,China |
| 投稿时间：2016-12-21 |
| DOI：10.11654/jaes.2016-1639 |
| 中文关键词: 熵值法 重金属 风险评估 空间分布 多元统计分析 |
| 英文关键词: entropy method heavy metals risk assessment geostatistical analysis multivariate statistical analysis |
| 基金项目:国家自然科学基金项目（21267020，21467026）；石河子大学应用基础研究青年项目（400380101） |
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| 中文摘要: |
| 在新疆准东煤田周边的农业用地共采集163份表层土壤样品。采用重金属富集系数和潜在风险指数对土壤重金属（Cd、Cr、Cu、Ni、Zn和Hg）污染生态风险进行评估，并通过多元统计分析和地统计分析对重金属的来源进行了解析。富集系数显示：重金属Cu存在轻微的富集，Cd和Hg存在显著的富集，其他金属均不存在富集。潜在风险指数表明：重金属Cd和Hg存在不同程度的污染，其他金属均不存在污染，研究区域的综合潜在风险很高。多元统计分析结果表明：Cr、Cu、Ni和Zn为第一类，来源于自然背景；Cd和Hg分别为第二类和第三类，来源于农业、工业和旅游业。采用熵值法计算第一类金属中Cr、Cu、Ni和Zn各自的权重，并将第一类金属统一为一个新的变量，通过对3类重金属三维空间分布图分析得出：第一类重金属可能来源于土壤母质；第二类重金属主要来源于工业污染；第三类重金属主要来源于农业活动。 |
| 英文摘要: |
| Assessment of the ecological risk and analysis of the sources of heavy metals can provide scientific basis for controlling and managing soil pollution. 163 soil samples were collected from the farmland surrounding the coal mine of East Junggar Basin, and the ecological risks of heavy metals were evaluated via the index of enrichment factor(EF) and the potential ecological risk index(RI). Meanwhile, the sources of heavy metals were analyzed by using multivariate statistical analysis and geostatistical analysis. The EF results showed that Cd was slightly enriched, Cu and Hg were significantly enriched, and the other heavy metals studied were not enriched. The RI results showed that Cd and Hg had very high ecological risk, the other heavy metals studied did not have ecological risk, and the study area had extremely high ecological pollution. Principal Component Analysis(PCA) and Cluster Analysis(CA) showed that Cr, Cu, Ni, and Zn were the first components and came from the natural background; Cd was the second component; and Hg was the third component, which came from agriculture, industry, and tourism. The weights of different heavy metals were calculated by using entropy method, and the first component was unified as a new variable quantity. The three dimensional spatial distribution of different components revealed that the first kind of heavy metals mainly came from the natural contents of soils, the second kind of heavy metals mainly came from industrial pollution, and the third kind of heavy metals mainly came from agricultural activities. |
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