摘要
重金属健康风险评价对居民身体健康具有重要意义。使用电感耦合等离子体发射光谱仪(ICP-OES)测定了莱阳市农村的31个地下水体中重金属Cu、Fe、Zn、Mn、Cd和Cr的含量水平,阐明了该地区重金属的空间分布特征、来源及其迁移规律,并运用美国环保局推荐的健康风险评价模型对其引起的健康风险进行了评价。结果表明,该地区地下水中Cr未检出,Cu、Fe、Zn、Mn和Cd的浓度范围分别是0～59、23～905、29～50 700、3～2 999、0～1μg/L。根据我国饮用水质量标准,所有样点中Cu和Cd的浓度未超标,Zn、Mn和Fe的超标率分别为22.58%、16.13%和6.45%,个别样点超标倍数甚高。健康风险评价结果表明,Cu、Fe、Zn、Mn通过饮用水途径产生的健康风险平均值分别为3.49×10-10、1.91×10-10、100.50×10-10、37.40×10-10a-1,均远低于ICRP(5×10-5a-1)和USEPA(1×10-4a-1)的最大可接受风险水平。但是Zn和Mn对人体健康危害的平均个人年风险明显高于其他地区,因此,该研究区非致癌物Zn和Mn的污染来源及其环境行为应该引起重视。该研究为该区域水质污染状况研究及治理监管工作提供理论依据,为其他地区重金属的监测和质量控制提供参考。
Health risk assessments of heavy metal are significant for resident health. Concentrations of Cu, Fe, Zn, Mn, Cd, and Cr in 31 groundwaters in rural areas of Laiyang City, Shandong Province were determined by inductively coupled plasma-optical emission spectrometer （ICP-OES）. The spatial distribution, sources and migration of the heavy metals in this area were studied, and health risk assessments in groundwaters were conducted using the US-EPA health risk assessment model. Results showed that Cr was not detected, and the concentrations of Cu, Fe, Zn, Mn and Cd were 0-59, 23-905, 29-50 700, 3-2 999 and 0-1 μg/L respectively. According to drinking water standard of China, the exceeding standard rate of Zn, Mn and Fe were 22.58%, 16.13% and 6.45%, far beyond the standard limits, while the concentration of Cu and Cd were lower than the standard. Average health risk values of non-carcinogenic pollutant Cu, Fe, Zn and Mn were 3.49×10-10, 1.91×10-10, 100.50×10-10, 37.40×10-10 a-1 respectively, which were much lower than the maximum allowance levels recommended by ICRP（5×10-5-a-1 ） and by USEPA（ 1×10-4a-1 ）. Nevertheless, the risk values of Zn and Mn were higher than some areas in China, suggesting their pollution in groundwater should be paid more attentions. The study would provide theoretical basis for deliberating of water pollution and prevention, and also give reference for monitoring and controlling heavy metals in other areas.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2013年第9期180-186,共7页
Environmental Science & Technology
基金
中国科学院“百人计划”项目
关键词
胶东半岛
农村
地下水
重金属
健康风险评价
Jiaodong Peninsula
rural area
groundwater
heavy metals
health risk assessment
