Experimental Study on The Extraction of Heavy Metals from Landfill Liner by Electrokinetic Method

Abstract

Municipal solid waste dumps must be used for the proper disposal of household biodegradable waste. Landfills usually construct liner systems to prevent leachate from contaminating groundwater. Compacted clay is frequently the most basic of the several types of liner systems. Clay's limited permeability is the main argument in favour of utilizing it as a liner. Even though the compacted clay liners are kept for their designated usage, misuse could make leachate (which is a water like substance formed by mixing up of the percolated water and the water from degraded wastes) flow through them more intense. Leachate frequently contains heavy metals including lead, mercury, and cadmium in addition to toxicants, which can eventually seep into the groundwater and soil. Because they harm ecosystems and contaminate drinking water supplies, these toxic metals can pose a serious threat to human health and the environment. Thus, as a cost-effective alternative to conventional landfill liners, this study investigates the feasibility of using locally accessible bentonite and hydrated lime- stabilized clay. The study will examine the clay's geotechnical properties, including compressibility, shear strength, and hydraulic conductivity, to determine whether it is suitable for use as landfill liners. Reducing the heavy metal contamination of the clay liner is the aim of this effort. To avoid contaminating landfill liners, heavy metals will be reduced electrokinetically. This project report gives a summary of the work completed, the methodology, the test setup, and the current state of the project.