Clay barriers performance in landfills: A review.

Abstract

Clay barriers have garnered much interest in environmental engineering because they successfully reduce various ecological dangers, including groundwater contamination, the migration of leachate from landfills, and waste disposal in landfills. This review paper aims to provide a comprehensive analysis of the features, uses, and performance of clay barriers in various environmental conditions. The problem this review paper addresses is the dangers of waste disposal sites, which emphasizes landfills' harm to the ecosystem and explains why natural clays are often employed as barriers surrounding landfills to keep out pollution. The paper aims to provide an update on essential subjects about barrier system performance difficulties for landfills and their function in reducing the effects of pollutants on the surrounding environment. When designing physical barriers, it is essential to account for a certain amount of material degradation and ensure that the barriers will work for the time needed to achieve landfill sustainability.Subsequently, the elements that affect clay barrier performance are discussed in the study. These variables include long-term stability, chemical compatibility, hydraulic conductivity, and compaction techniques. The usefulness of clay barriers in practical applications is shown via case studies and experimental results. This illustrates the role of clay barriers in preventing the spread of pollutants and safeguarding natural resources.The paper also covers current advancements and new directions in clay barrier technology. These advancements include the use of nanomaterials, barriers made of geopolymers, and innovative construction techniques. The paper also addresses challenges related to the effects of aging, maintenance needs, and regulatory issues. It also provides viable ways to address these obstacles.

Keywords

• barrier performance
• landfill liner
• review
• leachate pollutants
• compacted clays