内陆咸水区水-岩作用试验研究  

An Experimental Study of Water-rock Action in Inland Saltwater Region

作　　者：王立艳[1] 邢立亭[1] 

机构地区：[1]济南大学资源与环境学院,济南250022

出　　处：《中国农村水利水电》2013年第10期119-121,125,共4页China Rural Water and Hydropower

基　　金：国家自然科学基金(41172222)

摘　　要：以鲁北地区为例，在对研究区水文地质调查的基础上，采用鲁北地区地下咸水、大气降水和含水介质为样品，分别测定其性质和组分，通过水岩作用试验，测定混合液的离子成分，分析水岩作用后地下水的离子组分特征及水文地球化学作用过程，深化对内陆成水形成及演化的认识。结果表明：成水百分含量在20％～40％之间为水化学作用差异性的临界范围；SO42-被吸附量最大，存在对Cl-的吸附作用，且被吸附量的大小顺序为SO42-〉HCO3-〉Cl，在咸水含量高的条件下水岩作用存在SO42---HCO3-；阳离子交换以Mg-Na交换为主，Ca—Na次之；水岩作用后，方解石、白云岩处于沉淀状态，石膏、岩盐处于溶解状态。因此，受气候、地下水动力条件和古沉积环境影响，内陆地区广泛形成TDS〉2g／L的Cl.SO4-Na型或CLSO4-Na-Mg型的咸水／微咸水。In the case of North Shandong, according to hydrogeotogical investigations for the study area, taking salt groundwater, atmospheric precipitation and aquifer medium as samples, the physico-chemical characterization and component of water samples and the soil samples were measured respectively. And then, the characteristics of ion components and the rule of hydrogeochemical action were analyzed to deepen cognitions of the formation and evolution mechanism of saltwater during water-rock action experiment. The results are as follows： ①Difference in hydrogeochemical action has a critical interval that percentage of salt water content is from 20% to 40%.②SO42- adsorption quantity is the biggest. There is really CI- adsorption. And the size order of anion adsorption quantity is SO42-〉HCO3 〉 CI-. ③ Cations exchange that Mg-Na is the primary and Ca-Na is the following. Meanwhile, SO42 - HCO3- exchange process takes place in high saltwater content during water-rock mixing process. ④It takes place that calcite and dolomite precipitated, gypsum and halite dissolves after water-rock action process. Therefore, under the influence of climate, hydraulic conditions and ancient sedimentation environment, salt water and slight salt water, which is TDS〉2 g/L, of which the hydrogeochemical type is Cl. SO4-Na type or Cl. SON4a. Mg type is formed widely in inland regions.

关 键 词：水岩作用试验 阳离子交换作用 吸附作用 矿物溶解 沉淀作用 内陆咸水区 

分 类 号：TV213.4[水利工程—水文学及水资源]