Permeability of Clay Liners with Contaminantsby Puvvadi V. Sivapullaiah,
Abstract: Clays are increasingly used as liners for waste disposal facilities. Chemical compatibility studies with hydraulic conductivity tests must be performed to determine the effect of the waste fluid. Contaminants can be categorized into groups such as cations, anions, electrolytes, acids and alkalies and organic fluids and their effects can be explained. The lower is the valency the lower is the permeability. Increase in the electrolyte concentration increases the permeability. Anion adsorption significantly alters the permeability. High concentrations of acids increases the permeability whereas alkalis reduce the permeability of clays. Immiscible organic fluids are not permeable through clays compacted with water content. Miscible organic fluids increases the permeability in proportion to decrease in the dielectric constant.
Subject Headings: Permeability (soil) | Clays | Clay liners | Chemical wastes | Acids | Alkalinity | Compacted soils
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