Abstract
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, HCO3- and F- had a weak positive correlation, and Ca2+ was the only ion with a negative correlation with F-.
Highlights
Fluoride is an essential trace element in the human body that can harden tooth enamel within the optimal intake concentration range (0.5~1.5 mg/L) and can effectively reduce the incidence of dental caries
Shuangliao City is a fluorosis hot spot in Jilin Province [3], and the disease is focused in the northern part of the city
According to the work of Sun et al [3], high fluorine levels in groundwater are observed within the area of endemic fluorosis
Summary
Fluoride is an essential trace element in the human body that can harden tooth enamel within the optimal intake concentration range (0.5~1.5 mg/L) and can effectively reduce the incidence of dental caries. Excessive intake (>1.5 mg/L) can cause endemic fluorosis, such as dental fluorosis and skeletal fluorosis [1]. Fluorine poisoning caused by drinking water, due to abnormally high concentrations in the environment is a familiar local disease and is prevalent in the world [2]. Shuangliao City is a fluorosis hot spot in Jilin Province [3], and the disease is focused in the northern part of the city. Groundwater is the main source of water for the residents, industrial and agricultural production of Shuangliao City. Studies of the hydrogeochemical characteristics of fluorine in the groundwater under Shuangliao City are needed
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