离子交换对GCL防渗能力的影响  

Influence of ion exchange on hydraulic conductivity of GCL

作　　者：周正兵[1] 王钊[1] 王俊奇[1] 

机构地区：[1]武汉大学土木建筑工程学院,湖北武汉430072

出　　处：《长江科学院院报》2002年第3期37-40,共4页Journal of Changjiang River Scientific Research Institute

基　　金：水利部科技推广中心资助项目(00437201000081)

摘　　要：GCL在垃圾填埋场中的用量占其总用量的90%,而填埋场中的沥滤液含有大量高于1价的阳离子(如Ca2+,Mg^(2+)等),它们与GCL中的阳离子发生离子交换,影响GCL的防渗性能。经研究分析GCL膨润土中的阳离子与沥滤液中的阳离子发生离子交换的条件、机理、过程以及它们对GCL防渗能力的影响,提出了有针对性的解决办法。The dosage of geosynthetic clay liner (GCL) is very great in landfills (about 90 percent of its sumdosage). The leachate in the landfills involves a lot of multi-valence cations, such as Ca2+, Mg2+, etc., Ion ex-change between these cations and cations in GCL will influence GTCL'S hydraulic conductivity. This paper pre-sents the condition, mechanism and process of ion exchange between the ions of bentonite in the GCL and ions inleachate and their effects on GCL's impermeability, and some resolution methods are proposed.

关 键 词：GCL 离子交换 水力渗透系数 膨润土 沥滤液 

分 类 号：TU531.7[建筑科学—建筑技术科学]