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Decolorization and Removal of Reactive Red 198 by Nano-Magnetic Graphene Oxide Publisher



Ghadim EE1 ; Lamei N2, 3 ; Panahyab A1 ; Hatefi M4 ; Abdi K2, 3
Authors
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Authors Affiliations
  1. 1. Young Researchers and Elite Club, Central Tehran Branch, Islamic Azad University, Tehran, 13185-768, Iran
  2. 2. Department of Radio Pharmacy and Medicinal Chemistry, School of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Drug Design and Development Research Center, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Qc Laboratory, Atra Pharmaceutical Company, Tehran, Iran

Source: Asian Journal of Chemistry Published:2017


Abstract

In this research, a systematic study of the adsorption and decolorization process of reactive red 198 (RR198) onto Fe3O4-graphene oxide (Fe3O4-GO) was applied via various pH, sorption time and temperature. Investigation of reactive red 198 adsorption kinetics were satisfied by the pseudo-first and second order model. According to the kinetic examinations, the equilibrium reached within 15 min following the pseudo-second-order model. The sorption data have interpreted by the Langmuir model with the maximum adsorption of 357.14 mg g-1 at 298 K and a rate constant of R2 = 0.996. The mean energy of adsorption and thermodynamic parameters such as ΔH°, ΔS° and ΔG° values were determined which included the exothermic and spontaneous nature of the sorption process. The results indicated, reactive red 198 vigorously was adsorbed on the Fe3O4-GO surface via π-π interaction and cation-π bonding acid under UV Irradiation could degrade the reactive red 198 strongly and within 60 min the reactive red 198 totally disappeared. © 2017, Chemical Publishing Co. All rights reserved.