河北省张家口坝上典型莜麦产区重金属元素健康风险评价
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中国地质科学院国家地质实验测试中心自然资源部生态地球化学重点实验室

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中国地质调查局“北京及周边地区综合地质调查”项目(编号: DD20190655)资助。


Health risk assessment of heavy metals in typical oats production region of Bashang area in Zhangjiakou, Hebei Province
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Affiliation:

Key Laboratory of Eco-Geochemistry,Ministry of Natural Resources,National Research Center for Geoanalysis,Chinese Academy of Geological Sciences

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The Key Program of the Chinese Academy of Sciences

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    摘要:

    【研究目的】为研究张家口坝上地区典型粮食作物莜麦产区重金属元素健康风险,以张北县莜麦农田为研究对象,系统采集莜麦籽实及其根系土、地下水和大气沉降样品,分析重金属元素对人体健康风险。【研究方法】采用致癌和非致癌健康风险模型评价研究区地下水、大气沉降和土壤重金属的人体健康风险,采用单一目标危害商数与综合目标危害商数评价研究区莜麦籽实重金属含量的人体健康风险。【研究结果】显示:研究区地下水中致癌风险元素Cr、非致癌元素Pb和Cu存在一定的健康风险,Pb元素是造成地下水重金属健康风险的主导因素;区内大气重金属不存在非致癌健康风险,Cr、As和Ni元素存在一定的致癌风险;研究区莜麦根系土壤对人体健康尚不存在致癌和非致癌风险,部分莜麦籽实样品显示有一定的人体健康风险,其中Cu、Zn、Ni元素在儿童中目标危害商数均大于1,重金属中单一目标危害商数与综合目标危害商数均是儿童大于成人。【结论】通过对张家口坝上典型莜麦产区的重金属元素进行综合健康风险评价,区内重金属元素对人体有的健康风险较小,但需要关注对儿童健康的影响,并对部分重金属元素风险进行监测。

    Abstract:

    【Objective】With the purpose of evaluating health risk of heavy metals in the typical Oats Production Region of Bashang area in Zhangjiakou, oats fields in Zhangbei County were selected as the research site, and atmospheric dry and wet depositions, groundwater samples, topsoils and oats point-to-point samples were systematically collected to determine health risk of heavy metals. 【Methods】Health risk assessment mode were used to evaluate non-carcinogenic and carcinogenic risks of topsoils, air depositions and groundwater samples, single target hazard quotient (THQ) and comprehensive target hazard quotient (TTHQ) were used to assess the health risk of heavy metals in oats to human health. 【Results】The result showed that carcinogenic element Cr, and non-carcinogenic elements Pb and Cu in the groundwater of study area pose health risks, with Pb being the major factor contributing to the health risk of heavy metals in groundwater. There was no non-carcinogenic health risk of heavy metals found in the atmosphere. Among the carcinogenic elements, Cr, As and Ni posed certain carcinogenic risk. There was no carcinogenic or non-carcinogenic risk of heavy metals in the soil samples of the study area; Cu, Zn and Ni in some oats seed samples exhibited health risks to both adults and children, with mean values of THQ for children being higher than 1, and THQ and TTHQ risk values were both higher in children than adults. 【Conclusion】Through the comprehensive health risk assessment of heavy metals in typical oats production region of Bashang area in Zhangjiakou, it was found that heavy metals in this area pose relatively little health risks to humans, but attention needs to be paid to their impact on children’s health, and some heavy metals need to be monitored for risk.

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  • 收稿日期:2022-12-28
  • 最后修改日期:2023-04-13
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  • 在线发布日期: 2023-05-15
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