Lee, Xin Jiat and Hiew, Yan Zhang and Lai, Kar Chiew and Tee, Wan Ting and Thangalazhy-Gopakumar, Suchithra and Gan, Suyin and Lee, Lai Yee (2021) Evaluation of industrial palm oil sludge as an effective green adsorbing substrate for toxic aqueous cadmium removal. Materials Science for Energy Technologies, 4. pp. 224-235. ISSN 2589-2991, DOI https://doi.org/10.1016/j.mset.2021.06.002.
Full text not available from this repository.Abstract
Palm oil sludge (POS), an industrial waste from the palm oil industry, was utilised as a new adsorbent for the removal of toxic cadmium (Cd2+). Response surface methodology was carried out to investigate the effects of initial concentration (C0), contact time (t), dosage (W) and pH and optimise the process conditions. The maximum adsorption capacity was evaluated to be 18.49 mg g−1 at these optimised conditions: C0 = 200 mg L-1, t = 60 min, W = 0.3 g and pH 5.8. The adsorption equilibrium was achieved after 60 min, whereby the adsorption equilibrium and kinetic were best described by the Freundlich isotherm and pseudo-second-order kinetic models, respectively. The adsorption of Cd2+ onto POS was thermodynamically spontaneous (ΔG = -35.63 to -31.97 kJ mol−1), exothermic (ΔH = -35.92 kJ mol−1) with increased randomness at the solid–liquid interface (ΔS = 0.283 kJ mol−1 K−1). POS exhibited a high regeneration potential using 0.4 mol L-1 hydrochloric acid, with a desorption efficiency over 90 after 5 adsorption–desorption cycles. Conclusively, POS is an effective adsorbent for Cd2+ removal. © 2021
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Higher Education, Malaysia [Grant No: FRGS/1/2020/STG05/UNIM/02/2] |
| Uncontrolled Keywords: | Adsorption; Cadmium; Heavy metal; Palm oil sludge; Response surface methodology |
| Subjects: | T Technology > TS Manufactures |
| Divisions: | Deputy Vice Chancellor (Research & Innovation) Office > Nanotechnology & Catalysis Research Centre |
| Depositing User: | Ms Zaharah Ramly |
| Date Deposited: | 30 Oct 2023 08:55 |
| Last Modified: | 30 Oct 2023 08:55 |
| URI: | http://eprints.um.edu.my/id/eprint/35704 |
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