Abstract
This paper presents the feasibility study on utilization of locally available clayey soil as a compacted clay liner based on its contaminant adsorption capacity under the presence of organic chemical Ethylene Diamine Tetra-acetic Acid (EDTA) which is abundantly released into the environment. Lead ion was selected as a contaminant and its adsorption by the soil was assessed by conducting batch sorption experiments with lead solution, presence of organic chemical EDTA with varying pH and concentration of lead. From this study, it was observed that, with an increase in the concentration of lead (from 10 to 30 mg/L), percentage adsorption of lead by soil was observed to be decreased with increase in initial concentration and percentage of absorption was increased with increase in the pH of the solution. With the presence of EDTA at pH 7, the percentage adsorption of lead by the soil decreased due to the formation of PbEDTA2− complex. This study shows that locally available clayey soil can be used as a compacted liner, where presence of EDTA is assured.
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