Synthesis and characterization of magnetic graphene oxide for arsenic removal from aqueous solution

Sherlala, A.I.A. and Abdul Raman, Abdul Aziz and Bello, Mustapha Mohammed (2019) Synthesis and characterization of magnetic graphene oxide for arsenic removal from aqueous solution. Environmental Technology, 40 (12). pp. 1508-1516. ISSN 0959-3330, DOI

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A magnetic graphene oxide (MGO) was developed for the adsorption of As(III) from aqueous solution. The characteristics of MGO were investigated using Fourier-transform infrared (FTIR), X-ray diffraction and field emission scanning electron microscope-E/energy-dispersive X-ray analyses. Batch adsorption experiments were designed using central composite design, and the effects of adsorbent dosage, pH, contact time and concentration of As(III) were investigated. The MGO showed an excellent performance, removing up to 99.95% of As(III) under the following condition: initial As(III) concentration = 100 mg/L, pH = 7, adsorbent dosage = 0.3 g/L and contact time = 77 min. MGO dosage and initial pH were the most significant parameters influencing the process performance. FTIR analysis of the used adsorbent confirms the adsorption of As(III) through complexation between surface functional groups of the MGO and the oxyanions of As(III). The adsorbent maintained a significant level of performance even after four cycles of adsorption. Thus, the developed MGO has the potential to be used for the abatement of arsenic pollution. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.

Item Type: Article
Funders: University of Malaya Post-graduate Research - PPP [grant number PG322-2016]
Uncontrolled Keywords: Graphene oxide; iron oxide; arsenic; adsorption; central composite design
Subjects: T Technology > TP Chemical technology
Divisions: Faculty of Engineering
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 16 Jan 2020 06:54
Last Modified: 16 Jan 2020 06:54

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