华东师范大学学报（自然科学版）Issue(4)：132-143,12.DOI:10.3969/j.issn.1000-5641.2015.04.014
地下淡水驱替咸水过程中水文地球化学作用的试验研究
Experimental study on hydrogeochemistry action in the process of freshwater displacing saltwater
摘要
Abstract
Based on test materials,including of silt,shallow salt groundwater and atmospheric precipitation which were got in northwestern Shandong geochemistry action in the process of freshwater displacing saltwater were studied.The results indicated that (1)When content of clay was high in aquifer medium,and specific conductivity of exudate was less than or equal to 0.83 ms/cm in the process of freshwater displacing saltwater,clay played a role of film effect in con-centrating ion components.(2)Dolomite still kept precipitation with water,and halite still kept dissolution in the process of freshwater displacing saltwater.Calite precipitated when specific conductivity of exudate was more than 1 .00 ms/cm;Gypsum balanced with water when specific conductivity of exudate was more than or equal to 6.22 ms/cm.Mg/Ca-Na exchange interaction was remarkable with critical ion strength being in 0.20~0.25 mol/L.Adsorption was remarka-ble while specific conductivity of exudate was more then 12.00 ms/cm.Displacement experiment showed that hydrogeochemistry actions were happened in the process of freshwater displacing saltwater with adsorption,exchange interaction,lixiviation,dolomitization and mixing action.关键词
浅层咸水/水化学特征/水文地球化学作用/驱替试验/内陆地区Key words
shallow salt groundwater/water chemical characteristics/hydrogeochemistry action/displacement experiment/inland region分类
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邢立亭,王立艳,李常锁,徐天..地下淡水驱替咸水过程中水文地球化学作用的试验研究[J].华东师范大学学报（自然科学版）,2015,(4):132-143,12.基金项目
国家自然科学基金 （）
