Interaction of Earthen Liner Materials with Industrial Waste Leachate

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Abstract
The objective of this research was to study the effect of industrial waste leachate on the hydraulic conductivity of compacted clay soils of the type used in clay liners for waste landfills and impoundments. The liquids used in the research included leachate from an industrial solid-waste landfill, liquids from two industrial waste impoundments, two simulated leachates formulated in the laboratory from reagent-grade organic chemicals, and a laboratory-formulated mixture of one of the impoundment liquids and chlorinated hydrocarbons. Column tests and other techniques were used to investigate waste/soil interactions. None of the liquids increased the hydraulic conductivity of any of the soils. Although concentrated organic liquids can degrade the integrity of clay liners, the dilute organic liquids investigated in this research did not attack or degrade clay liner materials.

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