Graphene oxide/Fe3O4/SO3H nanohybrid: a new adsorbent for adsorption and reduction of Cr(VI) from aqueous solutions

Abdolhamid Alizadeh; Gisya Abdi; Mohammad Mehdi Khodaei; Muthupandian Ashokkumar; Jhaleh Amirian

doi:10.1039/C7RA01536D

Graphene oxide/Fe₃O₄/SO₃H nanohybrid: a new adsorbent for adsorption and reduction of Cr(vi) from aqueous solutions†

Abdolhamid Alizadeh,

*^ab Gisya Abdi,^a Mohammad Mehdi Khodaei,^a Muthupandian Ashokkumar^c and Jhaleh Amirian^d

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* Corresponding authors

^a Department of Organic Chemistry, Faculty of Chemistry, Razi University, Kermanshah, Iran
E-mail: ahalizadeh2@hotmail.com, ahalizadeh2@razi.ac.ir
Fax: +98 833 427 4559
Tel: +98 833 427 4559

^b Nanoscience & Nanotechnology Research Center (NNRC), Razi University, Kermanshah, Iran

^c School of Chemistry, University of Melbourne, VIC 3010, Australia

^d Department of Regenerative Medicine, College of Medicine, Soonchunhyang University, 366-1, Sangyong-dong, Cheonan-City, Chung Cheong Nam-Do 330-090, Republic of Korea

Abstract

A sulfonated magnetic graphene oxide (SMGO) hybrid was successfully synthesized via the nucleophilic substitution reaction and characterized. The removal of chromate by SMGO was investigated. The effects of contact time, initial pH of the solution, and initial chromate concentration on the removal efficiency were investigated. The optimal experimental conditions for enhanced chromate removal were found to be a contact time of 60 min at an initial solution pH of 3. The observed data were fitted with Lagergren pseudo-second-order kinetic model, indicating that chromate adsorption on SMGO was a chemical interaction in nature. The Langmuir model was also used to describe the adsorption processes and the adsorption capacity was found to be 222.22 mg g⁻¹. Thermodynamic studies (ΔG < 0, ΔH > 0, ΔS > 0) revealed that the adsorption process was exothermic and spontaneous. SMGO has potential to be applied several times after desorption in wastewater treatment.

This article is part of the themed collection: Removal of chromium from aqueous solutions

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Article information

DOI: https://doi.org/10.1039/C7RA01536D
Article type: Paper
Submitted: 06 feb. 2017
Accepted: 26 feb. 2017
First published: 08 mar. 2017
This article is Open Access

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RSC Adv., 2017,7, 14876-14887

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Graphene oxide/Fe₃O₄/SO₃H nanohybrid: a new adsorbent for adsorption and reduction of Cr(VI) from aqueous solutions

A. Alizadeh, G. Abdi, M. M. Khodaei, M. Ashokkumar and J. Amirian, RSC Adv., 2017, 7, 14876 DOI: 10.1039/C7RA01536D

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