Dr Amthal Al-Gailani A.Z.Al-Gailani@hull.ac.uk
Lecturer
Dr Amthal Al-Gailani A.Z.Al-Gailani@hull.ac.uk
Lecturer
Julius G. Bongosia
Karl Hornsby
Dr Martin Taylor Martin.Taylor@hull.ac.uk
Lecturer
Heavy metal contamination is a primary environmental and health concern contributing to organ damage, neurological disorders and developmental issues. Adsorption is an efficient, cost-effective method for removing heavy metals from contaminated water. In this study, the adsorption of five metals (Cu2+, Ni2+, Pb2+, Ag+ and Mn2+) into mesoporous sugarcane bagasse-derived biochar (surface area: 1061.77 m2 g−1) was investigated using multi-component isotherm models, including Extended Langmuir (EL), Extended Freundlich (EF), Modified Competitive Langmuir (MCL) and Extended Sips (ES). The biochar was synthesised via KOH activation (1, 1 w/w) followed by pyrolysis at 800 °C. The ES model was found to best describe the competitive adsorption behaviour. Among the tested metals, Pb2+ exhibited the highest adsorption capacity (605.45 mg/g), followed by Cu2+ (501.77 mg/g). Kinetic analysis using pseudo-first-order and pseudo-second-order models confirmed chemisorption superiority, specifically for Cu2+, Mn2+, and Pb2+. The rate-limiting step was temperature-dependent; intraparticle diffusion dominated at 25 °C, while chemisorption prevailed at 55 °C. The thermodynamic analysis (ΔH > 0, ΔG < 0) confirmed that the adsorption process is endothermic and spontaneous under the tested conditions. After three regeneration cycles, the biochar structure stability is confirmed with evidence of full adsorbate removal.
Al-Gailani, A., Bongosia, J. G., Hornsby, K., & Taylor, M. J. (2025). Maximising E-waste leachate adsorption: multi-component isotherm models and mechanisms with scalable mesoporous sugarcane bagasse-derived biochar. Journal of Water Process Engineering, 75, Article 107979. https://doi.org/10.1016/j.jwpe.2025.107979
Journal Article Type | Article |
---|---|
Acceptance Date | May 18, 2025 |
Online Publication Date | May 20, 2025 |
Publication Date | 2025-06 |
Deposit Date | May 21, 2025 |
Publicly Available Date | May 21, 2025 |
Print ISSN | 2214-7144 |
Electronic ISSN | 2214-7144 |
Publisher | Elsevier |
Peer Reviewed | Peer Reviewed |
Volume | 75 |
Article Number | 107979 |
DOI | https://doi.org/10.1016/j.jwpe.2025.107979 |
Public URL | https://hull-repository.worktribe.com/output/5179784 |
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http://creativecommons.org/licenses/by/4.0
Copyright Statement
© 2025 The Authors. Published by Elsevier Ltd.
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