Implementing a laterite soil-peat-rice husk soil mixture to assess the performance of heavy metal migration

Maheera Mohamad and Khai Lin Chong and Salmah Omar and Md. Abdul Kafi and Nabilah Mohamad Khairi and Siti Nor Farhana Zakaria and Vignes Chellamuthu (2024) Implementing a laterite soil-peat-rice husk soil mixture to assess the performance of heavy metal migration. Environmental Quality Management, 34 (3). pp. 1-8. ISSN 1088-1913

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Abstract

Solid waste can be effectively managed through disposal in engineered landfills, which are specifically designed facilities. The application of daily soil cover at these landfills is vital for mitigating leachate generation and protecting groundwater from contamination. This study aims to investigate whether a mixture of laterite soil (LS), peat soil (PS), and rice husk (RH) can reduce the migration of heavy metals within a landfill setting. Heavy metal pollution poses a significant environmental challenge in Malaysia, specifically the five metals focused on in this research: Cd, Cr, Cu, Ni, and Zn. The study evaluates the adsorption capacity of the soil mixture for these metal ions by utilizing laboratory analyses of key parameters such as pH and cation exchange capacity (CEC). To assess the effectiveness of the soil mixture, various combinations were tested, highlighting a blend of 50% LS, 40% PS, and 10% RH as the most effective. An equilibrium study was conducted, wherein metal ion solutions were prepared, allowing the soil mixtures to interact with these solutions until a state of equilibrium was achieved. Subsequently, batch adsorption experiments were performed to measure the mixtures’ ability to adsorb the metal ions, with ongoing assessment of pH and CEC. The results indicate that the selected mixture can significantly reduce metal ion concentrations, demonstrating its potential as a viable daily cover for landfills. Ultimately, this research provides valuable insights into strategies for minimizing heavy metal migration in landfills and safeguarding groundwater resources.

Item Type:	Article
Keyword:	Daily cover | landfill | laterite soil | peat soil | removal | rice husk
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA1-2040 Engineering (General). Civil engineering (General) > TA703-712 Engineering geology. Rock mechanics. Soil mechanics. Underground construction T Technology > TD Environmental technology. Sanitary engineering > TD1-1066 Environmental technology. Sanitary engineering > TD511-780 Sewage collection and disposal systems. Sewerage
Department:	FACULTY > Faculty of Engineering
Depositing User:	ABDULLAH BIN SABUDIN -
Date Deposited:	23 May 2025 15:31
Last Modified:	23 May 2025 15:31
URI:	https://eprints.ums.edu.my/id/eprint/43870

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