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Removal of Benzene, Toluene, Ethylbenzene and Xylene (Btex) From Aqueous Solutions by Montmorillonite Modified With Nonionic Surfactant: Equilibrium, Kinetic and Thermodynamic Study Publisher



Nourmoradi H1, 2 ; Nikaeen M1 ; Khiadani MH1, 3
Authors
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Authors Affiliations
  1. 1. Department of Environmental Health Engineering, Environment Research Center, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
  2. 2. Department of Environmental Health Engineering, School of Health, Ilam University of Medical Sciences, Ilam, Iran
  3. 3. School of Engineering, Edith Cowan University, WA, Australia

Source: Chemical Engineering Journal Published:2012


Abstract

The adsorption characteristics of benzene, toluene, ethylbenzene and xylene (BTEX) from aqueous solutions by montmorillonite (Mt) modified with poly ethylene glycol (PEG-Mt) were investigated. The batch adsorption technique was used to assess the influence of various parameters such as loading rates of the surfactant, contact time, pH, adsorbate concentration, solution ion strength and temperature on the BTEX sorption capacity by PEG-Mt. The raw and modified Mt was specified with X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). The XRD results showed that the interlayer spacing of the raw montmorillonite (12.10A) was increased by PEG surfactant modification (17.48A). The adsorption capacity of the PEG-Mt was increased by increasing the surfactant loading until 200% cation exchange capacity (CEC) of the clay. The equilibrium was achieved at the contact time of 24h. The adsorption capacity of the adsorbent was in order of B
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