淮河流域典型癌病高发区土壤和地下水重金属积累及健康风险

发布时间：2018-01-17 14:45

本文关键词：淮河流域典型癌病高发区土壤和地下水重金属积累及健康风险　出处：《环境科学学报》2016年12期 　论文类型：期刊论文

【摘要】：分别采集淮河沿岸某癌病高发区土壤和地下水样品,分析和探讨了土壤和地下水重金属的含量、分布和季节变化,以及土壤和地下水重金属积累的生态与健康风险.结果表明,除Zn外,土壤和地下水重金属含量旱季均高于雨季,癌病高发村庄高于其他村庄,河流污染是沿岸土壤和地下水重金属积累的主要原因.除土壤Cd达到中度潜在生态风险外,土壤中其余重金属的潜在生态风险总体为轻微级.癌病高发村庄居民饮水中重金属致癌和非致癌健康风险明显高于其他村庄居民,均为其他村庄居民的2倍以上,其中,重金属非致癌健康风险达到93.09×10-10a-1,接近国际健康组织推荐的最大可忽略风险,重金属致癌健康风险达到27.82×10-5a-1,分别为ICRP和US EPA推荐的最大可接受风险的5倍和2倍以上.各种重金属中,Pb和Cr是主要的非致癌健康风险因子,Cr是主要的致癌健康风险因子.癌病高发村庄土壤和地下水重金属积累明显,存在较高的饮水重金属暴露健康风险.
[Abstract]:The contents, distribution and seasonal variation of heavy metals in soil and groundwater were analyzed and discussed by collecting soil and groundwater samples from a high incidence area of cancer along the Huaihe River. The ecological and health risk of heavy metal accumulation in soil and groundwater. The results showed that the heavy metal content in soil and groundwater in dry season was higher than that in rainy season, and that in villages with high incidence of cancer was higher than that in other villages except Zn. River pollution is the main cause of heavy metal accumulation in coastal soil and groundwater, except for the moderate potential ecological risk of CD in soil. The potential ecological risk of the remaining heavy metals in soil was generally slight. The risk of carcinogenic and non-carcinogenic health in drinking water of residents with high incidence of cancer was significantly higher than that of other villages. The non-carcinogenic health risk of heavy metals was 93.09 脳 10 ~ (-10) a ~ (-1), which was close to the maximum negligible risk recommended by the international health organization. The health risk of heavy metal carcinogenesis was 27.82 脳 10 ~ (-5) a ~ (-1), which was 5 times and 2 times of the maximum acceptable risk recommended by ICRP and US EPA, respectively. Lead and Cr are the main non-carcinogenic health risk factors and Cr is the main carcinogenic health risk factor. The accumulation of heavy metals in soil and groundwater is obvious in the villages with high incidence of cancer. There is a high risk of heavy metal exposure in drinking water.
【作者单位】：河南大学环境与规划学院;河南大学环境与健康工程中心;
【基金】：国家自然科学基金(No.41371195);国家自然科学青年基金项目(No.41301336) 教育部和河南省共建河南大学项目(No.SBGJ0907010)~~
【分类号】：X53;X523
【正文快照】： 1引言(Introduction)受人类生产和生活活动的影响,土壤和地下水重金属积累在许多地区呈现持续加重的趋势(Cameron et al.,1997;Nicholson et al.,2003;杨军等,2005a;张小敏等,2014;周益奇等,2016).由于重金属元素在地表的自然迁移以水迁移方式为主,在地表径流较弱和偏碱性环境

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