Abstract
This study was carried out to investigate the treatability of ion exchange resin (Indion MB 6 SR) for the removal of chromium (VI), aluminium (III), zinc (II), copper (II), iron (II), and phosphate (PO4)3−, chemical oxygen demand (COD), ammonia nitrogen (NH3-N) and colour from semi-aerobic stabilized leachate by batch test. A range of ion exchange resin dosage was tested towards the removal efficiency of leachate parameters. It was observed that equilibrium data were best represented by the Langmuir model for metal ions and Freundlich was ideally fit for COD, NH3-N and colour. Intra particle diffusion model, pseudo first-order and pseudo second-order isotherm models were found ideally fit with correlation of the experimental data. The findings revealed that the models could describe the ion exchange kinetic behaviour efficiently, which further suggests comprehensive outlook for the future research in this field.
Highlights
Despite rapid changes of landfill technology from uncontrolled dump site to a highly engineered landfill for ultimate solid waste disposal method, generation of heavily polluted leachate remains inevitable (Cortez et al 2011)
This study was carried out to investigate the treatability of ion exchange resin (Indion MB 6 SR) for the removal of chromium (VI), aluminium (III), zinc (II), copper (II), iron (II), and phosphate (PO4)3, chemical oxygen demand (COD), ammonia nitrogen (NH3-N) and colour from semi-aerobic stabilized leachate by batch test
It was observed that equilibrium data were best represented by the Langmuir model for metal ions and Freundlich was ideally fit for COD, NH3-N and colour
Summary
Despite rapid changes of landfill technology from uncontrolled dump site to a highly engineered landfill for ultimate solid waste disposal method, generation of heavily polluted leachate remains inevitable (Cortez et al 2011). Depending on the choice of treatment method, the applicability, efficiency and economic benefit of landfill leachate treatment mostly depend on the type of leachate characteristics and landfill design. Biological treatments such as aerobic, anaerobic, sequencing batch reactor, aerated lagoons, and activated sludge are effective in removing organic matters in the early stages (from young leachate) when the BOD5/COD ratio is greater than 0.4 (Kurniawan et al 2006; Renou et al 2008). Biological treatment is inefficient when it comes to the treatment of stabilized leachate due to the narrow
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