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http://dx.doi.org/10.5012/jkcs.2010.54.01.125

Kinetic and Thermodynamic Studies of Brilliant Green Adsorption onto Carbon/Iron Oxide Nanocomposite  

Ahmad, Rais (Environmental Research Laboratory, Department of Applied Chemistry, Aligarh Muslim University)
Kumar, Rajeev (Environmental Research Laboratory, Department of Applied Chemistry, Aligarh Muslim University)
Publication Information
Journal of the Korean Chemical Society / v.54, no.1, 2010 , pp. 125-130 More about this Journal
Abstract
In the present work, we have investigated the adsorption efficiency of carbon/iron oxide nanocomposite towards removal of hazardous brilliant green (BG) from aqueous solutions. Carbon/iron oxide nanocomposite was prepared by chemical precipitation and thermal treatment of carbon with ferric nitrate at $750^{\circ}C$. The resulting material was thoroughly characterized by TEM, XRD and TGA. The adsorption studies of BG onto nanocomposite were performed using kinetic and thermodynamic parameters. The adsorption kinetics shows that pseudo-second-order rate equation was fitted better than pseudo-first-order rate equation. The experimental data were analyzed by the Langmuir and Freundlich adsorption isotherms. Equilibrium data was fitted well to the Langmuir model with maximum monolayer adsorption capacity of 64.1 mg/g. The thermodynamic parameters were also deduced for the adsorption of BG onto nanocomposite and the adsorption was found to be spontaneous and endothermic.
Keywords
Nanocomposite; Adsorption; Kinetic; Thermodynamic; Desorption;
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