| 福建闽西矿区周边土壤Cd、Pb、Cr含量及风险评价 |
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| 引用本文： | 刘兰英,涂杰峰,黄薇,陈丽华,吕新,伍云卿.福建闽西矿区周边土壤Cd、Pb、Cr含量及风险评价[J].福建农业学报,2017,32(1). |
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| 作者姓名： | 刘兰英 涂杰峰 黄薇 陈丽华 吕新 伍云卿 |
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| 作者单位： | 福建省农业科学院农业质量标准与检测技术研究所,福建福州 350003;福建省精密仪器农业测试重点实验室,福建 福州 350003 |
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| 基金项目： | 福建省科技计划项目——省属公益类科研院所基本科研专项 |
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| 摘 要： | 为了解福建闽西矿区周边农田土壤中重金属Cd、Pb、Cr积累特征及健康风险,分别测定了农田土壤中Cd、Pb和Cr含量。通过污染指数法和潜在生态危害指数法评价了研究区农田土壤的污染状况和生态危害程度,并应用概率评估模型评价了3种重金属对人体造成的健康风险。结果表明:研究区农田土壤受到不同程度的Cd、Pb、Cr污染,土壤中各元素的单因子污染指数均值大小顺序为CdPbCr,综合污染指数为1.21,整体处于轻度污染等级。土壤中重金属的潜在生态风险指数均值大小顺序为CdPbCr,综合潜在生态风险指数为226,整体处于中度生态危害等级。研究区土壤中Cd的致癌风险商尚未超过有关专家所建议的风险阈值10~(-4),对人体造成致癌风险的可能性较低;Pb的非致癌风险商基本都低于其风险阈值1,不产生健康风险;Cr的致癌风险商有12.9%超过风险阈值(10~(-4)),存在对人体健康构成威胁的可能。
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| 关 键 词： | 土壤 重金属 污染 矿区 风险评价 |
Monitoring and Risk Assessment on Heavy Metals in Soil at a Mining Area in Fujian |
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| LIU Lan-ying,TU Jie-feng,HUANG Wei,CHEN Li-hua,L Xin,WU Yun-qing.Monitoring and Risk Assessment on Heavy Metals in Soil at a Mining Area in Fujian[J].Fujian Journal of Agricultural Sciences,2017,32(1). |
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| Authors: | LIU Lan-ying TU Jie-feng HUANG Wei CHEN Li-hua L Xin WU Yun-qing |
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| Institution: | LIU Lan-ying,TU Jie-feng,HUANG Wei,CHEN Li-hua,L(U) Xin,WU Yun-qing |
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| Abstract: | Accumulation and health risks of heavy metals in the soils around a mine in Fujian were studied.Contents of Cd,Pb and Cr in the agricultural fields nearby were determined.Heavy metal pollution on the soil and damages to the ecology were evaluated based on various indices,and the health risks to humans were assessed using a probability assessment model.The results showed that the soils in the surveyed areas were contaminated by Cd,Pb and Cr to varying extents.The average individual pollutant index on the metals ranked in the order of Cd＞Pb＞Cr,and the over-all pollution index was 1.21 implying that the soils were under a lightly polluted condition.The average potential ecological risk was Cd＞Pb＞Cr with a comprehensive ecological risk index of 226 indicating a medium level of ecological hazard.The Cd in the soils was assessed to belower than 10-4,a level less likely to risk cancers in humans as suggested by experts.The non-carcinogen risks index on Pb did not exceed the accepted limit of 1,which ought not to cause any health concerns.On the other hand,the Cr contamination in the soils made the carcinogenic risk index 12.9％ greater than the threshold value of 10-4 that could post a thread to human health. |
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| Keywords: | soil heavy metal contamination mining area risk assessment |
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