生态与农村环境学报2025，Vol.41Issue(4)：496-505,10.DOI:10.19741/j.issn.1673-4831.2024.0412
廊坊平原区高氟地下水分布及形成机理
Distribution and Formation Mechanism of High Fluoride Ground water in Langfang Plain Area
摘要
Abstract
Natural high-fluoride groundwater is distributing in the Langfang Plain of China.To help ensure the water secu-rity of residents in this area,further research is needed to identify the spatial distribution characteristics and formation mechanisms of the high fluoride groundwater.In this study,76 and 100 deep and shallow groundwater samples were col-lected in the Langfang Plain,respectively.The pH,fluoride ions,major anions and cations in the groundwater samples were analyzed and tested to systematically analyze the distribution of high-fluoride groundwater,the fluoride source,and its hydrogeochemistry.The results show that fluorine concentrations in both deep and shallow groundwater exceeded the stand-ard of 1.0 mg·L-1 at a rate of 73.7％and 40％,respectively.The groundwater fluorine concentrations increased with depth,showing higher concentrations in deep groundwater(median 1.65 mg·L-1)than in shallow groundwater(median 1.06 mg·L-1).Fluorite dissolution in the aquifer is the main source of fluorine in the groundwater and the saturated pre-cipitation of calcite and dolomite promotes fluorite dissolution,thus favoring fluorine enrichment in deep groundwater.The alkaline groundwater environment favors the desorption of F-in the aquifer and the competitive adsorption of HCO3-can further promote the accumulation of fluorine in groundwater.Cation exchange adsorption also promotes the accumulation of fluorine in deep groundwater.Evapotranspiration concentration has obvious effects in some shallow high-fluoride groundwa-ter.At the same time,geological processes such as the dissolution of fluorine-containing minerals and rock salt are the main mechanisms for fluorine enrichment in deep groundwater.关键词
地下水/氟/水文地球化学/分布特征/廊坊平原区Key words
groundwater/fluoride/hydrological geochemistry/distribution characteristics/Langfang Plain分类
环境科学引用本文复制引用
李堃正,白雪山,杜垚,张旭虎,朱小龙,靳潇锐..廊坊平原区高氟地下水分布及形成机理[J].生态与农村环境学报,2025,41(4):496-505,10.基金项目
国家科技基础资源调查专项(2017FY100405) （2017FY100405）
河北省地质资源环境监测与保护重点实验室开放课题(JCYKT202202) （JCYKT202202）
