Geochemical characteristics and influencing factors of soil fluorine in the Huantai area of Shandong Province

In order to investigate the geochemical characteristics and influencing factors in the Huantai area of Shandong Province, a total of 70 topsoil samples were collected and a total of 8 indicators including fluorine, organic matter and pH etc.were analyzed.Based on the geochemical map of the fluorine element, the spatial distribution characteristics of the fluorine content in the study area were studied.The results show that fluorine contents of analyzed samples range from 466.30 to 793.40 mg/kg, with the average value of 621.31 mg/kg, which is significantly higher than the background value of the Shandong Province and national levels.The study area has potential environmental and ecological risks.The area of soil with high fluorine content accounts for about 70% of the total area.The soil with excess fluorine content is concentrated in the vicinity of towns.The fluorine is moderate and the marginal content is distributed in the vicinity of Qingyin Highway in the southeast of the study area and in the northern part.The fluorine contents in the soil are mainly controlled by pH, organic carbon contents and fertilization.This study can provide basic data and the scientific approach for improving environmental quality and preventing endemic fluorosis in the Huantai area.