The Efect of Rich Synthetic Copper-rich Solution on Antiseepage Dense Pre-hydration Geosynthetic Clay Liner  

作　　者：郭争争 GUAN Junfang 任子杰 GAO Huimin LI Peiyue GUO Zhengzheng;GUAN Junfang;REN Zijie;GAO Huimin;LI Peiyue(School of Resources and Environment Engineering,Wuhan University of Technology,Wuhan,430070,China;Hubei Key Laboratory of Mineral Resources Processing and Environment,Wuhan,430070,China)

机构地区：[1]School of Resources and Environment Engineering,Wuhan University of Technology,Wuhan,430070,China [2]Hubei Key Laboratory of Mineral Resources Processing and Environment,Wuhan,430070,China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2023年第4期796-802,共7页武汉理工大学学报（材料科学英文版）

基　　金：National Key Research and Development Project of China(No.2017FB0310902)。

摘　　要：Dense pre-hydrated geosynthetic clay liners(DPH GCLs)were manufactured as innovative materials accompanied by the advantage of lower hydraulic conductivity(k).The k of DPH GCLs permeated with de-ionized water(DIW)was 9.8×10^(−12) m/s.The effect of Cu^(2+)synthetic solution on DPH GCLs was discussed.Furthermore,the effect mechanism was studied on the basis of test technologies.A significant adverse impact on hydraulic performance of DPH GCLs is found when the concentration of Cu^(2+)is greater than 1 g/L.SEM,XRD,XRF,FTIR,and XPS analyses show that the effect of Cu^(2+)on DPH GCLs includes two steps.Firstly,Cu^(2+)interacts with hydrophobic organic matter(HOM),and the adhesion of bentonite is destroyed,and some holes appear.The Cu^(2+)contacts with bentonite directly,and Cu^(2+)interacts with bentonite through ion exchange.Passivated phenomenon occurs on the surface of the bentonite,and swelling ability of bentonite is reduced,which causes permeable DPH GCLs.

关 键 词：geosynthetic clay liners fense pre-hydrated geosynthetic clay liners effect Cu^(2+) 

分 类 号：TB34[一般工业技术—材料科学与工程] TU57[建筑科学—建筑技术科学]