ABSTRACT
Landfill barriers play a fundamental role in environmental protection, mitigating the migration of contaminants into the surrounding environment. This review provides an in-depth analysis of the potential of diverse waste types as substitutes or amendments for conventional landfill liners and covers. Outlined from extensive literature, the study highlights the dual advantage of waste utilization in landfill barriers: conservation of natural resources and waste recycling enhancement. While certain waste products have shown promise due to their improved geotechnical and mechanical characteristics, concerns about the leaching of hazardous contaminants remain paramount. This review evaluates the optimal use of waste in landfill barriers. It emphasizes the necessity of comprehensive chemical and bioassay evaluations to accurately predict long-term leaching behavior and environmental compatibility. Research indicates the prospective utility of waste-derived materials in landfill barrier applications, aligned with environmental sustainability objectives. However, this approach mandates a heightened emphasis on safety, necessitating comprehensive, site-specific evaluations.
