包头某铝厂周边土壤重金属污染及健康风险评价

发布时间：2018-01-20 17:09

本文关键词： 包头铝厂重金属污染地累积指数健康风险评价　出处：《中国环境监测》2017年01期 　论文类型：期刊论文

【摘要】：以包头市某铝业周边500 m内土壤为研究对象,测定其东北、东南、西北、西南4个方向不同水平距离及深度处土样中Cu、Cd、Pb、Zn、Ni和Cr的含量,并采用地累积指数法和健康风险评价法对重金属污染状况进行评价。结果表明,该区域表层土壤中6种重金属普遍高于内蒙古土壤背景值,且在西南方向50 m处含量最高,人类活动对该区域重金属干扰强烈,而风向对重金属分布影响不大;铝厂周围土壤中Cd、Pb处于中污染-重污染,Cu和Ni处于无污染-中污染,Zn和Cr为无污染,各金属污染程度随土壤深度的增加而减轻;健康风险评价表明,研究区域内Cu、Pb、Ni和Cd均不存在非致癌健康风险,而Cd的致癌危害虽在可接受范围内,但已存在潜在致癌风险,Ni的致癌健康风险指数已超过预警值,应予以高度重视和防治。
[Abstract]:The soil samples from Baotou City within 500 meters around the aluminum industry were measured in the northeast, southeast, northwest and southwest of the soil samples with different horizontal distances and depths. The contents of Ni and Cr were evaluated by the method of ground accumulation index and health risk assessment. The results showed that the six heavy metals in the topsoil were generally higher than the background values in Inner Mongolia. The concentration of heavy metals was the highest at 50 m southwest, and the heavy metals in the area were strongly disturbed by human activities, but the wind direction had little effect on the distribution of heavy metals. CD ~ (2 +) Pb in the soil around the aluminum factory is in the middle pollution-heavy pollution, Cu and Ni are non-polluted, Zn and Cr are no pollution, and the degree of each metal pollution is reduced with the increase of soil depth. The health risk assessment showed that there was no non-carcinogenic health risk for both Cu PbN Ni and CD in the study area, while the carcinogenic hazard of CD was within the acceptable range, but there was already a potential carcinogenic risk. The health risk index of Ni has exceeded the warning value, which should be paid more attention to and prevented.
【作者单位】：内蒙古科技大学能源与环境学院;
【基金】：内蒙古自治区自然科学基金资助项目(2015MS0408)
【分类号】：X53;X825
【正文快照】： 根据2014年《全国土壤污染状况调查公报》,我国土壤环境现状总体不容乐观,部分地区土壤污染较重,耕地土壤环境质量堪忧,工矿业废弃地土壤环境问题突出,污染类型以无机型为主,尤以重金属污染为最[1]。土壤重金属污染具有隐蔽性、滞后性、累积性和不可逆转性,不仅会影响粮食作物

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