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Application of Glycyrrhiza Glabra Root As a Novel Adsorbent in the Removal of Toluene Vapors: Equilibrium, Kinetic, and Thermodynamic Study Publisher Pubmed



Mohammadimoghadam F1, 2, 3 ; Amin MM1, 2 ; Khiadani M1, 4 ; Momenbeik F5 ; Nourmoradi H6 ; Hatamipour MS7
Authors
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Authors Affiliations
  1. 1. Environment Research Center, Isfahan University of Medical Sciences (IUMS), Isfahan, Iran
  2. 2. Department of Environmental Health Engineering, School of Health, IUMS, Isfahan, Iran
  3. 3. Department of Environmental Health Engineering, School of Health, Shahrekord University of Medical Sciences, Shahrekord, Iran
  4. 4. School of Engineering, Edith Cowan University, WA 6027, Australia
  5. 5. Department of Chemistry, Faculty of Sciences, University of Isfahan, Isfahan, Iran
  6. 6. Department of Environmental Health Engineering, School of Health, Ilam University of Medical Sciences, Ilam, Iran
  7. 7. Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan 81746-73441, Hezar Jerib Avenue, Iran

Source: Journal of Environmental and Public Health Published:2013


Abstract

The aim of this paper is to investigate the removal of toluene from gaseous solution through Glycyrrhiza glabra root (GGR) as a waste material. The batch adsorption experiments were conducted at various conditions including contact time, adsorbate concentration, humidity, and temperature. The adsorption capacity was increased by raising the sorbent humidity up to 50 percent. The adsorption of toluene was also increased over contact time by 12 h when the sorbent was saturated. The pseudo-second-order kinetic model and Freundlich model fitted the adsorption data better than other kinetic and isotherm models, respectively. The Dubinin-Radushkevich (D-R) isotherm also showed that the sorption by GGR was physical in nature. The results of the thermodynamic analysis illustrated that the adsorption process is exothermic. GGR as a novel adsorbent has not previously been used for the adsorption of pollutants. © 2013 Fazel Mohammadi-Moghadam et al.
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