This license permits use, distribution and reproduction, commercial and non-commercial, provided that the original work is properly cited and is not changed in anyway.
Landfill leachate is a major issue throughout the world. In the Sri Lankan scenario there are not enough methods to treat or control generated leachate. Therefore the ultimate aim of this research is to evaluate the performances of laterite soil and compost to treat landfill leachate using a cost effective and reliable technique. Several standard procedures available in literature were incorporated with this study. Five different soil-layering systems (filters) were prepared by mixing laterite soil with compost (0%, 10%, 20%, 30% and 40% by weight). Leachate from the Karadiyana control dumpsite was fed for each filter over 100 days to evaluate the filtering performances of selected parameters such as BOD, COD, TSS, EC, ORP, pH, Phosphates, Nitrates and selected heavy metals including Zn, Ni, Pb, Mn, Cu, Fe and Cd. For each parameter, filtering efficiencies were calculated and concentrations of each parameter were compared with the selected water quality standards. In addition, Kruskal-Wallis and Mann-Whitney non-parametric tests were used for studying filtering efficiencies of those parameters. During the experiment, pH of all filtering systems was within 6.0-8.5 which complies with the water quality standards. Even after 100 days of operation, filtering efficiencies of BOD (>90%), COD (>85%), Nitrates (75-95%) and Phosphates (>90%) were at higher levels. Removal efficiencies of both TSS (40-90%) and EC (0-80%) illustrated wide range of fluctuations. Greater filtering efficiencies were obtained for Fe (90-100%). Highly diverse efficiencies were found for Mn, Cu, Ni, Cd, Zn and Pb. Within the operational period, phosphate and nitrate concentrations were fitted to water quality standards. However, COD and BOD concentrations were fixed to those standards especially after 25 days. Abundances of Cd, Cu, Fe, Zn and Ni were reached or very close to the maximum permissible levels of water quality standards. Conversely, TSS, Mn and Pb in the filtrates ignore the standard recommended levels. According to the statistical analysis, it can be ultimately concluded that using 20% of compost with 80% of laterite by dry weight gives the optimum conditions for the greater filtering performances.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.