内陆平原区中层承压水系统中粘土的阻滞作用研究  

Study on the blocking effect of clay in the middle confined water system of inland plain

作　　者：张文静[1] 邢立亭[1] 相华 宋广增[1] 杨奕[1] 侯新宇[1] ZHANG Wen - jing XING Li - ting XIANG Hua SONG Guang - zeng YANG Yi HOU Xin - yu(College of Resources and Environment, Jinan University, Jinan 250022, China Jinan Municipal Bureau of Hydrology, Jinan 250014, Shandong, China)

机构地区：[1]济南大学资源与环境学院,山东济南250022 [2]山东省济南市水文局,山东济南250014

出　　处：《地下水》2017年第5期7-11,20,共6页Ground water

基　　金：国家自然科学基金项目:"内陆平原区粘土对浅层地下水与中深层咸水循环交替的阻滞作用"(41172222);"浅层大陆演化咸水水文地质参数变异机制研究"(41472216)

摘　　要：为研究内陆平原区地下水化学成分的形成演变及其分带性,通过野外钻探取得51~112 m不同深度的6层粘土样并在钻孔内90 m深度处取得的水样,采用批式法设计实验。结果表明:(1)不同深度粘土对地下水中常规离子的等温吸附曲线符合线性吸附规律,总体上表现为离子浓度越高,粘土对其吸附作用越强;(2)粘土对地下水中各常规离子存在阻滞作用,其阻滞强度表现为与地下水水化学组分含量基本一致,同时粘土的阻滞作用反过来控制地下水中常规水化学组分含量;(3)粘土减弱了含水层间的水力联系,导致不同深度水质、水位的差异,粘土对常规离子的阻滞作用控制内陆平原中层承压水水化学成分的垂向分带性。可见,粘土对内陆平原区地下水水化学类型及其水化学成分的形成与演变有一定控制作用。In order to study the formation and evolution of groundwater chemical composition in inland plains, 6 m clay samples with different depths of 51 - 112 m were obtained by field drilling and water samples were obtained at depth of 90 m in borehole. A batch method was used to design experiments. The results show that： 1 ） The isothermal adsorption curves of conventional ions in different depths of clay meet the linear adsorption laws, and the higher the ion concentration is, the higher the adsorption effect of clay is. 2 ） The clay has resistance to the conventional ions in the groundwater And the retardation of the clay is consistent with the chemical composition of the groundwater, and the blocking effect of the clay in turn controls the content of conventional water chemical components in the groundwater. 3 ） The clay weakens the hydraulic connection between the aquifers, The difference of water quality and water level between different depths and the blocking effect of clay on conventional ions control the vertical zoning of chemical composition of water in the middle layer of inland plain. It can be seen that clay has a certain control effect on the formation and evolution of groundwater hydroehemieal type and its chemical composition in inland plain area.

关 键 词：粘土 吸附及解吸 等温吸附方程 常规离子 阻滞作用 

分 类 号：P641.12[天文地球—地质矿产勘探]