| 张家口坝下地区高氟地下水成因分析与健康风险评价 |
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| 引用本文： | 宋晓光,芦岩,梁仕凯,胡斌.张家口坝下地区高氟地下水成因分析与健康风险评价[J].地质科技通报,2022,41(1):240. |
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| 作者姓名： | 宋晓光 芦岩 梁仕凯 胡斌 |
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| 作者单位： | 河北省地矿局国土资源勘查中心;中国科学院生态环境研究中心饮用水科学与技术重点实验室;中国科学院大学 |
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| 基金项目： | 河北省国土资源厅项目2013995431中国博士后科学基金项目2020M680698 |
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| 摘 要： | 为了明晰张家口坝下地区高氟地下水的成因,探究其对当地居民饮用水安全的潜在影响,采集了391组潜水样品(井深≤100 m),通过水化学分析法、图解法、离子比例法、饱和指数计算法等对高氟地下水的分布与成因进行了分析,并利用美国EPA非致癌健康风险评价模型对四类受体人群进行健康风险评价。结果表明,研究区高氟地下水(ρ(F-)>1.5 mg/L)主要分布在地势低洼、高氟岩浆岩下游的山前地带、封闭式小盆地、沿河两侧的径流滞缓区等地区,其主要机制主要包括矿物风化溶解作用、碱性环境下的晶格置换作用和阳离子交换作用;盐效应会影响研究区地下水中F-富集,但不是高氟地下水的主要成因;农业活动与地下水中F-的富集无关。此外,坝下地区分布的电厂、钢铁厂等是永定河水系的潜在污染源,对高氟地下水形成的影响不容忽视。研究区婴儿、儿童、成年男性和成年女性的平均健康风险指数依次为1.20,0.74,0.69,0.56,呈现出受体年龄越小,风险越高;女性对含氟地下水的抗风险能力优于男性的特征。建议针对高风险区发展多水源联合供水模式,提升退氟改水工程效率,保障区域供水安全。
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| 关 键 词： | 高氟地下水 水岩相互作用 离子交换作用 健康风险 坝下地区 |
| 收稿时间： | 2021-03-31 |
Analysis of high-fluoride groundwater formation mechanisms and assessment of health risk in Baxia region,Zhangjiakou |
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| Song Xiaoguang,Lu Yan,Liang Shikai,Hu Bin.Analysis of high-fluoride groundwater formation mechanisms and assessment of health risk in Baxia region,Zhangjiakou[J].Bulletin of Geological Science and Technology,2022,41(1):240. |
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| Authors: | Song Xiaoguang Lu Yan Liang Shikai Hu Bin |
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| Institution: | (Land and Resources Exploration Center of Hebei Bureau of Geology and Mineral Resources Exploration,Shijiazhuang 050081,China;Key Laboratory of Drinking Water Science and Technology,Research Center for Eco-Environmental Science,Chinese Academy of Sciences,Beijing 100085,China;University of Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | Totally, 391 unconfined groundwater samples(depth ≤ 100 m) were collected in order to investigate the high-fluoride groundwater formation causes, and explore the potential impacts on drinking water safety to local residents in Baxia region, Zhangjiakou.Hydrochemical analysis, graphical method, ions ratio method and saturation index calculation method were applied in this study to analyze the spatial distribution and formation mechanisms of high-F- groundwater.Meanwhile, the non-carcinogenic human health risk assessment model recommended by US EPA was also used to evaluate health risk of four groups of receptors.The results indicate that high-F- groundwater(F->1.5 mg/L) mainly distribute in the low-lying and piedmont zone of the downstream of high-F- magmatic rock, enclosed basin, runoff stagnant area along the river and other areas.The dissolution and precipitation of the minerals, crystal lattice replacement under alkaline environment, ion exchange are the major mechanisms for high-F- groundwater formation in the study area.Salt effect can affect F- enrichment in groundwater, but it is not the principal mechanism.There is no correlation between agricultural activities and F- enrichment in groundwater.Additionally, the power plants, steelworks and other factories distributed in Baxia region are the potential pollution sources of the Yongding River system.The impacts of these industrial contamination sources on high-F- groundwater formation cannot be ignored.The hazard index values of infants, children, adult males and adult females were 1.20, 0.74, 0.69 and 0.56, respectively, demonstrating the younger people are more susceptible to fluoride contamination.Moreover, the adult females are more resistant to fluoride contamination than the adult males in the study area.Thus, it is suggested to develop the multi-source combined water supply mode for high risk areas and improve the efficiency of defluorination, in order to ensure water supply safety. |
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| Keywords: | high-fluoride groundwater water-rock interaction ion exchange health risk Baxia region |
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