关键词: 防渗;衰减;机理

Abstract: Column tests of bentonite, zeolite and red mud liners were conducted. Based on the analysis and comparison of the phase components of bentonite, zeolite and red mud liners and the composition of the leachate pre and post permeation, the antipermeation and attenuation mechanism of bentonite, zeolite and red mud liners for garbage landfill was discussed, which providing reference for the construction of multilayer liners of bentonite, zeolite and red mud. The results indcated that the permeability and attenuation capability of bentonite depent on its water absorption and adsorbability. Complicated channel structure of zeolite made it have good ability of attenuation. Calcite and aragonite in red mud increased after permeation, and the strength increase, which ensured the integrity of liner. Attenuation also enhanced after Fe~(3+) reduced by organic compounds.

Key words: antipermeation%attenuation%mechanism