Document Type

Journal Article


Hindawi Publishing Corporation


Faculty of Health, Engineering and Science


School of Engineering




This article was originally published as: Mohammadi-Moghadam, F., Amin, , M., Khiadani, M. , Momenbeik, F., Nourmoradi , H., & Hatamipour, M. (2013). Application of Glycyrrhiza glabra Root as a novel adsorbent in the removal of toluene vapors: Equilibrium, kinetic, and thermodynamic study. Journal of Environmental and Public Health, 2013, Article 986083. Original article available here


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.