天津市七里海洼应急供水水源地地下水水化学特征分析  

Analysis of groundwater chemistry characteristics in Qi Lihai emergency water source of Tianjin

作　　者：石文学[1] 李立伟[1] 张磊[2] 田西昭 

机构地区：[1]天津华北地质勘查局地质研究所,天津300170 [2]河南省地质矿产勘查开发局第三地质矿产调查院,河南信阳464000 [3]河北省环境地质勘查院,河北石家庄050021

出　　处：《水资源与水工程学报》2016年第2期98-102,107,共6页Journal of Water Resources and Water Engineering

基　　金：天津市国土资源和房屋管理局矿产资源补偿费地质项目(200802)

摘　　要：在充分收集天津市七里海洼应急供水水源地地下水化学资料的基础上,综合运用Piper图、散点图、Gibbs半对数图等方法对水化学特征及氟离子的形成机制进行研究。结果表明:研究区内水化学类型以HCO_3—Na为主,局部为HCO_3·Cl—Na,其形成主要受到岩石风化和蒸发沉淀两种因素的综合控制;而Ca^(2+)的富集会抑制水中氟的释放。同时,对水源地第Ⅴ含水组地下水进行水文地球化学反向模拟。模拟结果显示:在模拟路径上,该含水组地下水主要发生白云石、方解石、石膏、岩盐、萤石等矿物的溶解反应,同时伴随有阳离子交换作用,矿化度明显升高,水化学类型由HCO_3—Na转变为HCO_3·Cl—Na。On the basis of collecting the groundwater chemistry analysis data of Qilihai emergency water source field in Tianjin, the paper applied Piper diagram, scatter diagram and Gibbs semi - logarithm picture to study the formation mechanism of groundwater and fluoride. The results showed that the main type of water chemistry is HCO3-Na, and partially is HCO3 . Cl-Na, the major chemical process of groundwater mechanism is controlled by rock weathering and evaporation -crystallization; Ca2＋ can inhibit the release of fluoride in water. Besides, results from the inverse modeling of hydrogeochemistry reactions in the V aquifer indicate that deep groundwater has mainly experienced the processes including the dissolution of dolomite, calcite, gypsum, halite and fluorite. Accompanied by the effect of cation exchange, the mineralization degree is significantly increased, the type of groundwater chemistry is turned from HCO3- Na to HCO3 . Cl--Na.

关 键 词：应急供水水源地 氟离子 水-岩作用 水文地球化学反向模拟 

分 类 号：X824[环境科学与工程—环境工程]