Effect of chromium on the engineering properties of amended clay liner

Abstract

Waste generated by the full extent of human activities range from dumping relatively innocuous substances such as food and paper waste to toxic substances, dumping of waste in a disposal facility serves to minimize the effect of waste on the environment. In many region centralized disposal facility has been formed by landfilling. In order to prevent ground water contamination liners are provided in a landfill. Barrier layer in a liner system prevents the migration of leachate and from polluting the ground water. In this study amended soil liner was prepared using the clay mineral Calcium Bentonite, locally available kaolinite soil and fine sand. The liner was mixed with chromium solution of four different concentrations and the change in engineering properties of the liner is reported in this paper. It is found that there is only marginal increase in permeability of liner due to chromium where as there are noticeable variation on the other geotechnical properties