德州南部高氟地下水水化学特征研究OA

High fluorine groundwater is a typical poor quality water source.It can cause endemic high fluo-rine disease.In this study,taking Yucheng-Pingyuan area as the research object,the fluorine content,hydrochemical types and influence factors have been studied.It is showed that most of the fluorine content in shallow groundwater is not more than 1.0mg/L,and hydrochemical types are mainly HCO3-Na type and Cl·SO4-Na type.Most of the fluorine content in deep groundwater is more than 1.0mg/L,and hydrochemical types are HCO3·SO4-Na type and HCO3·Cl-Na type.Based on the study of pH and chemical evolution of groundwater,it is regarded that alkaline environment can promote fluorine ion ag-gregation to a certain extent.It is not the only decisive factor,and the formation mechanism of high fluo-rine water in this area are mainly water-rock interaction and evaporation concentration.