Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization, Institute of Deep Earth Sciences and Green Energy, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, 518060, China; Shenzhen Key Laboratory of Deep Underground Engineering Sciences and Green Energy, Shenzhen University, Shenzhen, 518060, China; The 402 Team, The Bureau of Geology and Mineral Resources Exploration of Hunan, Changsha 410014, China.
Guangdong Provincial Key Laboratory of Deep Earth Sciences and Geothermal Energy Exploitation and Utilization, Institute of Deep Earth Sciences and Green Energy, College of Civil and Transportation Engineering, Shenzhen University, Shenzhen, 518060, China; Shenzhen Key Laboratory of Deep Underground Engineering Sciences and Green Energy, Shenzhen University, Shenzhen, 518060, China.
Chemosphere. 2021 Apr;269:128698. doi: 10.1016/j.chemosphere.2020.128698. Epub 2020 Oct 22.
Potable groundwater has become the primary water source for the local population because of the serious pollution of As and heavy metals in the surface water around the Dongting Lake Plain. A comprehensive research on the shallow groundwater was performed in this study via geographical information system (GIS) and geochemical method to evaluate groundwater quality and health risks of shallow groundwater in Dongting Lake Plain. Eighty-seven samples were collected and the content of As and twelve other heavy metals (e.g., Al, Fe, Zn, Cu, Mo, Ni, Mn, Co, Ba, Pb, Cd, and Cr) in the samples were detected by inductively coupled plasma-mass spectrum (ICP-MS) technology. The water pollution situation was assessed using heavy metal contents and evaluation indices, and human health risks were evaluated on the basis of both carcinogenic and noncarcinogenic aspects. Results showed that the shallow groundwater quality is moderately to heavily contaminated and should be considered in some areas of the Li and Xiangjiang River coasts. Several regions have the potential of carcinogenic risks induced by As and the groundwater in some regions may have the risk of Cr carcinogenesis in the wet season. These findings suggested that the potential harm caused by Fe, Zn, Mn, Cr, and As pollution of groundwater, especially As and Cr in wet season, must be considered. The spatio-temporal study on the groundwater quality evaluation may be beneficial to the protection and sustainable development of groundwater resources in Dongting Lake Plain.Summary: Although the overall noncarcinogenic health risk by metals in shallow groundwater of Dongting Lake is low, noncarcinogenic health risks caused by Fe, Zn, Mn, and As exist in some areas.
由于洞庭湖平原周边地表水砷和重金属污染严重，饮用水地下水已成为当地居民的主要水源。本研究采用地理信息系统（GIS）和地球化学方法对浅层地下水进行了综合研究，以评估洞庭湖平原浅层地下水的水质和健康风险。采集了 87 个样本，采用电感耦合等离子体质谱（ICP-MS）技术检测了样本中砷和其他 12 种重金属（如 Al、Fe、Zn、Cu、Mo、Ni、Mn、Co、Ba、Pb、Cd 和 Cr）的含量。利用重金属含量和评价指数评估水污染状况，并从致癌和非致癌两个方面评价人体健康风险。结果表明，浅层地下水水质中度至重度污染，在澧县和湘江沿岸的一些地区应加以考虑。一些地区存在由 As 引起的致癌风险，部分地区在雨季 Cr 也具有致癌风险。这些发现表明，必须考虑地下水 Fe、Zn、Mn、Cr 和 As 污染特别是雨季 As 和 Cr 造成的潜在危害。地下水水质评价的时空研究可能有利于洞庭湖平原地下水资源的保护和可持续发展。
尽管洞庭湖平原浅层地下水中金属的总体非致癌健康风险较低，但在一些地区仍存在 Fe、Zn、Mn 和 As 引起的非致癌健康风险。
