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This study investigated the hydrogeochemical characteristics of fluoride in the groundwater of Shuangliao City. This paper analyzes the effects of different forms of hydrochemistry and the chemical speciation of fluorine in water. The results showed that an area of high fluorine was located in the northern section of Shuangliao City, and the soil salinization degree was also high in this area. The chemical composition of groundwater was mainly formed by the evaporation-concentration process; both pH (weak alkaline environment) and total dissolved solids (TDS) had a positive effect on fluorine enrichment within a certain range; Na +  and F -  had significant positive correlation, HCO 3  -  and F -  had a weak positive correlation, and Ca 2+  was the only ion with a negative correlation with F - .

Hydrogeochemical Characteristics of Fluoride in the Groundwater of Shuangliao City, China