不同阳离子引起微粒释放的临界盐浓度值  

Critical salt concentrations of particle release caused by different cations

作　　者：韩志勇[1] 李国霞[1] 刘同华 陈继红[1] 

机构地区：[1]兰州理工大学石油化工学院,兰州730050 [2]安丘市地震局,安丘262106

出　　处：《水文地质工程地质》2008年第6期117-120,共4页Hydrogeology & Engineering Geology

基　　金：国家自然科学基金资助项目(40572142)

摘　　要：通过水平渗流试验,以NaCl,KCl,LiCl,NH4Cl,CaCl2和MgCl2溶液为研究对象,分别测定不同阳离子引起微粒释放、导致多孔介质水敏感性发生的临界盐浓度值(CSC)。研究结果表明:临界盐浓度不是一个单一的浓度值,而是一个范围,其中一价阳离子Na+、K+、Li+和NH4+溶液的临界盐浓度分别为0.06±0.005、0.05±0.005、0.05±0.005和0.01±0.005mol/L;在二价阳离子中,Mg2+能引起极其轻微的微粒释放,但是没有明显的临界值,Ca2+不但不能引起微粒释放,而且有强烈地抑制微粒释放的作用,可以认为二价阳离子没有明显的临界盐浓度。With horizontal seepage experiments, this paper analyzes the critical salt concentrations （CSC） of the different cations, by examining such solutions as NaCI, KCl, LiCl, NH4 Cl, CaCl2 and MgCl2, which can cause the particle release of water sensitivity of porous media. The research results show that the critical salt concentration is not a single value, but is a range; the critical salt concentrations of monovalent cation solutions of Na^＋, K^＋, Li^＋ and NH4^＋ are 0.06±0.005, 0.05±0.005, 0.05±0.005 and 0.01±0.005 mol/L, respectively. The divalent cations of Mg^2＋ can cause extremely slight particles release, without an obvious critical value. The Ca^2＋ cannot cause particle release, however, it restrains the occurrence of this phenomenon. A conclusion can be drawn that the divalent cations have not apparent critical salt concentrations.

关 键 词：阳离子 微粒释放 临界盐浓度 多孔介质 水敏感性 

分 类 号：P342[天文地球—水文科学] P734.35[天文地球—地球物理学]