Current situation and human health risk assessment of fluoride enrichment in groundwater in the Loess Plateau:A case study of Dali County,Shaanxi Province,China

作     者：Rui-ping Liu Hua Zhu Fei Liu Ying Dong Refaey M El-Wardany Rui-ping Liu;Hua Zhu;Fei Liu;Ying Dong;Refaey M El-Wardany

作者机构：Xi’an CenterChina Geological SurveyMinistry of Natural ResourcesXi’an 710054China Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid RegionMinistry of EducationXi’an 710054China Key Laboratory for Geo-hazards in Loess AreaMinistry of Natural ResourcesXi’an 710054China Field Base of Scientific Observation of Shaanxi TongguanMinistry of Natural ResourcesXi’an 710054China Dalian ocean and fishery comprehensive administration supervision lochusDalian 116000China Assiut BranchAl-Azhar UniversityAssiut 71524Egypt 

出 版 物：《China Geology》 (中国地质（英文）)

年 卷 期：2021年第4卷第3期

页      面：487-497页

学科分类：081803[工学-地质工程] 08[工学] 0708[理学-地球物理学] 0818[工学-地质资源与地质工程] 

基　　金：This study was funded by the survey projects initiated by the China Geological Survey(DD20189220 DD20211317 and 1212010634713) 

主　　题：Fluoride Groundwater Human health risks Loess Plateau Hydrogeological survey engineering Dali County Shaanxi Province China 

摘      要：This study aims to investigate the mechanisms and health risks of fluoride enrichment in groundwater in the Loess Plateau,*** taking Dali County,Shaanxi Province,China as an example,this study obtains the following results through field investigation and the analyses of water,soil,and crop samples.(1)The groundwater can be divided into two major types,namely the Quaternary pore-fissure water and Karst *** Karst area and sandy area have high-quality groundwater and serve as the target areas for optional water *** groundwater in the study area is slightly alkaline and highly ***,high-fluoride groundwater is mainly distributed in the loess and river alluvial plains in the depression area of the Guanzhong Basin and the discharge areas of the groundwater,with the highest fluoride concentration exceeding seven times the national standard.(2)Fluoride in groundwater mainly originates from a natural source and human *** natural source refers to the fluoride-bearing minerals in rocks and soil,and the fluoride from this source is mainly controlled by natural factors such as climate,geologic setting,pH,specific hydrochemical environment,ion exchange,and mineral *** activities in modern life can be further divided into industrial and agricultural sources primarily.(3)The health risks of fluoride contamination are very high in the Loess Plateau,especially for children compared to ***,the risks of fluoride exposure through food intake are higher than those through drinking water *** authors suggest selecting target areas to improve water supply and ensure the safety of drinking water in the study ***,it is necessary to plant crops with low fluoride content or cash crops and to conduct groundwater treatment to reduce the fluoride concentration in drinking *** results will provide a theoretical basis for safe water supply in the faulted basin areas in the Loess Plateau.