Study on the effect of different metals on soil liner medium

To protect ground w ater from landfill contam inants, soil liners are constructed as a simple liner which provide the finalline of defuse against groundwater contamina­tion in landfill. Clay minerals are the most important chemical weathering product of soil. The very low permeability of the clay barrier is expected to lengthen the lifetime of the landfill and slow down the consequent release of contaminants. It is observed from the experimental results that using soil as liner medium, the groundw ater con­tam ination of heavy metals like lead, cadmium, cobalt, copper can be reduced to 28 - 97% depending on the metal characteristics. A mathematical expression is developed depending on the experimental conditions and it is observed that the experimental result shows satisfactory agreement with the experimental results.