Synthesis of CTAB intercalated graphene and its application for the adsorption of AR265 and AO7 dyes from water

Yusuf M 1 , Khan MA 2 , Otero M 3 , Abdullah EC 4 , Hosomi M 5 , Terada A 5 Show all authors , Riya S 5

Affiliations 

  • 1 Malaysia-Japan International Institute of Technology, Department of Environmental Engineering and Green Technology, University Technology Malaysia (UTM), Jalan Semarak, 54100 Kuala Lumpur, Malaysia; Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16, Nakacho, Koganei, Tokyo 184-8588, Japan
  • 2 Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia. Electronic address: mokhan@ksu.edu.sa
  • 3 Department of Applied Chemistry and Physics, Institute of Environment, Natural Resources and Biodiversity (IMARENABIO), University of León, 24071 León, Spain
  • 4 Malaysia-Japan International Institute of Technology, Department of Environmental Engineering and Green Technology, University Technology Malaysia (UTM), Jalan Semarak, 54100 Kuala Lumpur, Malaysia
  • 5 Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16, Nakacho, Koganei, Tokyo 184-8588, Japan
J Colloid Interface Sci, 2017 05 01;493:51-61.
PMID: 28088121 DOI: 10.1016/j.jcis.2017.01.015

Abstract

Environmental applications of graphene (GN) are limited by the occurrence of aggregation. Herein, graphene oxide (GO) was synthesized, reduced to GN by ascorbic acid, and intercalated with cetyltrimethylammonium bromide (CTAB). GN-CTAB was characterized by Boehm's titration, N2 adsorption/desorption, Fourier transform infrared spectroscopy, Raman spectroscopy, Fluorescence spectrophotometry, X-ray diffraction and Scanning electron microscopy. Then, GN-CTAB was used for the adsorptive removal of acid red 265 (AR265) and acid orange 7 (AO7) dyes from water both under batch and column operation. Under batch operation, the effect of pH, adsorbent dosage, initial dye concentration, contact time and temperature on dyes adsorption were assessed. Adsorption isotherms, kinetics, and thermodynamics were analyzed systematically. Regarding the fixed bed operation, the effect of both the bed height and flow rate were studied and experimental results fitted to the Thomas and BDST models. Then, the bed loss capacity along five adsorption-regeneration cycles was determined in order to further approach the practical application of GN-CTAB for wastewater treatment, namely for the removal of dyes.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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