Hydrochemical characteristics, driving factors and health risk of fluoride in groundwater from the northwestern Ordos Basin, China

作者：Jiacong Tian, Zhanjun Wang, Kyriaki Daskalopoulou, Maoliang Zhang, Yaoqiang Huo, Yingnan Cao, Jucai Yang, Wei Liu, Jianguo Liu, Sheng Xu · 发表于：Geoscience Frontiers · 年份：2025 · DOI：10.1016/j.gsf.2025.102123 · 被引用次数：19 · 研究领域：Fluoride Effects and Removal、Groundwater and Isotope Geochemistry、Geochemistry and Elemental Analysis

• Groundwater fluoride contamination in the Ordos Basin should be of concern. • Fluoride levels in 42% of groundwater samples exceeded the WHO limit of 1.5 mg/L. • Geogenic factors play a significant role in F − enrichment in groundwater. • Monte Carlo simulations reveal that health risks for children are the most significant. • Management strategies were proposed for fluoride enriched groundwater. Groundwater is essential for maintaining public health, promoting economic development, and ensuring ecosystem stability in arid and semi-arid regions. The northwestern Ordos Basin (China) primarily relies on groundwater from multilayered aquifer systems; however, our knowledge of the hydrochemical characteristics and water quality of groundwater in this region is limited. Here, we employed a newly collected dataset of 94 groundwater samples from different aquifers to constrain the source, controlling processes of fluoride in groundwater, and its potential health risk in the area. Groundwater is characterized by Na-Cl and Na-SO 4 types with a minor Na-HCO 3 type, which is primarily controlled by ion exchange, silicate weathering, and the dissolution of carbonate and evaporite minerals. Of the groundwater samples, 42% exceeded the fluoride limit of 1.5 mg/L established by the World Health Organization (WHO). This is mainly attributed to geogenic sources, including fluorine-bearing mineral dissolution, cation exchange, evaporation, and competitive adsorption. The water quality index ...