Magnetic graphene oxide-biomass activated carbon composite for dye removal

Tan, Yan Ying and Abdul Raman, Abdul Aziz and Bello, Mustapha Mohammed and Buthiyappan, Archina (2020) Magnetic graphene oxide-biomass activated carbon composite for dye removal. Korean Journal of Chemical Engineering, 37 (12). pp. 2179-2191. ISSN 0256-1115, DOI

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A magnetic composite was synthesized using palm kernel shell-based activated carbon, graphene oxide (GO) and iron oxide. The morphology, textural properties, magnetic properties, crystal structure and functional groups of the composite were studied. The characterization shows the successful formation of the ternary composite with a high specific surface area (280.39 m2/g) and abundant surface functional groups. The magnetic properties of the composite indicate a saturation magnetization of 33.72 emu/g, signifying that the composite can be easily separated with an external magnetic field. The performance of the composite was then investigated through the removal of an anionic azo dye, Acid Blue 113, from aqueous solution. The effect of initial pH of the solution, adsorbent dosage and adsorption contact time was studied. The composite achieved an adsorption capacity of 32.2 mg/g and 96.3% dye removal. Effective dye removal was still achieved after five cycles of adsorption-regeneration, with the dye removal of 74% after the fifth cycle. The analyses of adsorption isotherm and kinetics show that the adsorption process fits pseudo-second-order kinetic and Langmuir isotherm models, indicating a monolayer chemisorption process. The excellent adsorption performance and reusability of the composite and its magnetic separability signify its potential as an adsorbent for wastewater treatment. © 2020, The Korean Institute of Chemical Engineers.

Item Type: Article
Funders: Fundamental Research Grant Scheme (FRGS) provided by Ministry of Education (MOE), Malaysia with grant number FP141-2019A
Uncontrolled Keywords: Acid Blue 113; Adsorption; Iron Oxide; Modified Graphene Oxide; Palm Kernel Shell
Subjects: T Technology > TP Chemical technology
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 10 Feb 2021 02:24
Last Modified: 10 Feb 2021 02:24

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