DIFFERENT LANDFILL LINER MATERIALS: A COMPARATIVE STUDY

Abstract

Any waste material stored in a landfill poses potential problems. The one of major problem is the possible contamination of soil, surface water and groundwater. It may happen when leachate produced by water or liquid wastes moving inside, through and escape out of the landfill and then migrates into areas adjacent to the landfill. Municipal solid waste landfill needs a liner that separates the waste from the groundwater system. A liner is signified to minimize the migration of contaminants from the MSW. The migration of leachate below the clay liners can be prevented by using natural clay deposits, compacted clay, geosynthetic materials or mixer of them of a certain minimum thickness as a liner material. The purpose of this study is to provide an approach for comparing the performance of geosynthetic clay liners (GCLs) compacted clay liners (CCLs) and geomembrane used in the form of landfill liners material. Transport of solute is happens in porous media by two basic processes: diffusion and advection. An advection dispersion equation of second order one dimensional is used to compare. To examine the performance of these liner materials a MATLAB program is made. The solution is done analytically with the using of erfc function. Graphs and data sheets are prepared for different liner materials. These data provide significant results about the behavior of liner material. The transport rate of solute through the liner material is compared by using their effective porosity, tortuosity and effective molecular diffusion coefficient.