云南省镇雄县土壤重金属污染及潜在生态风险评估
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周亚龙, 郭志娟, 王成文, 陈杰, 彭敏, 成杭新
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Assessment of heavy metal pollution and potential ecological risks of soils in Zhenxiong County,Yunnan Province
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Ya-Long ZHOU, Zhi-Juan GUO, Cheng-Wen WANG, Jie CHEN, Min PENG, Hang-Xin CHENG
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表2 调查区土壤重金属元素地球化学等级评价样品数占比统计%
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Table 2 Statistics on the number of samples of geochemical grade evaluation of heavy metal elements in the study area %
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评价 | 指标 | 一等 | 二等 | 三等 | 四等 | 五等 | 单因子污染评价 | Pi | Pi≤1 | 1﹤Pi≤2 | 2﹤Pi≤3 | 3﹤Pi≤5 | Pi>5 | | 描述 | 清洁 | 轻微污染 | 轻度污染 | 中度污染 | 重度污染 | | As | 98.46 | 1.49 | 0.04 | 0 | 0 | | Cd | 8.97 | 31.12 | 22.68 | 15.34 | 21.89 | | Cr | 78.42 | 21.14 | 0.44 | 0 | 0 | | Cu | 69.76 | 16.22 | 7.43 | 6.37 | 0.22 | | Hg | 99.91 | 0.04 | 0 | 0 | 0.04 | | Ni | 81.67 | 17.67 | 0.44 | 0.18 | 0.04 | | Pb | 95.25 | 3.34 | 0.70 | 0.44 | 0.26 | | Zn | 93.58 | 5.45 | 0.62 | 0.31 | 0.04 | 内梅罗综合评价 | P综 | P综≤0.7 | 0.7﹤P综≤1 | 1﹤P综≤2 | 2﹤P综≤3 | P综>3 | | 描述 | 清洁 | 尚清洁 | 轻度污染 | 中度污染 | 重度污染 | | P综 | 4.92 | 10.86 | 39.03 | 16.62 | 28.57 | 潜在生态危害评价 | RI | RI﹤150 | 150≤RI﹤300 | 300≤RI﹤600 | RI≥600 | | | 描述 | 低 | 中 | 较高 | 高 | | | RI | 72.75 | 16.40 | 9.63 | 1.23 | |
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