Study on Anti-Seepage Stability of Soda Residue Compound Liners in Landfills

In order to investigate the anti-seepage stabilities and the attenuation capability against leachate pollutants of soda residue compound liner,the comparative permeation experiments in home-made compacted permeameters were carried out among soda residue compound liner,soda residue liner and subclay liner.Results show that the soda residue/subclay intercalation compound liner has excellent anti-seepage stability and attenuation ability of heavy metal,COD_(Cr) and NH_4~+-N in leachate,which can come up to the subclay liner.But liner seepage has high Cl~-mass concentration.So it is necessary to have more research on the long term anti-seepage stability.The hydraulic conductivity of the 60% soda residue+40% subclay mixture compound liner and the soda residue liner goes beyond the limit of 10~(-7)(cm/s) with infiltration of leachate,and it is unsuitable to be landfill liner.