Title: Equilibrium and thermodynamics of dye removal from aqueous solution by adsorption using rubber wood saw dust

Authors: K. Vasanth Kumar, K. Porkodi

Addresses: Department of Chemical Engineering, ACTech, Anna University, Chennai, TN 600 025, India. ' Department of Chemistry, PSG College of Technology, Coimbatore 641004, TN, India

Abstract: Batch equilibrium experiments were carried out for the sorption of Bismarck brown onto rubber wood saw dust particles. The operating variables studied were the initial dye concentration, particle diameter and solution temperature. A linearised Langmuir isotherm was found to well represent the equilibrium uptake for the range of operating conditions studied. The monolayer sorption capacity of rubber wood saw dust for the sorption of Bismarck brown was estimated to be 35 mg g⁻¹. The sorption capacity was found to increase with decreasing particle size. The negative value of ΔG and ΔH suggests the spontaneity and exothermic nature of the process.

Keywords: Bismarck brown; batch equilibrium; linear methods; nonlinear methods; rubber wood saw dust; sorption; thermodynamics; dye removal.

DOI: 10.1504/IJETM.2009.023736

International Journal of Environmental Technology and Management, 2009 Vol.10 No.3/4, pp.295 - 307

Published online: 09 Mar 2009 *

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