Title: Adsorption dynamics of cobalt [Co(ii)] on rubber granules

Authors: Jahir Bin Alam, Rezaul Kabir Chowdhury, I. Reza

Addresses: Department of Civil and Environmental Engineering, Shahjalal University of Science and Technology, Sylhet 3114, Bangladesh. ' SA Centre for Water Management and Reuse, University of South Australia, Mawson Lakes, SA 5095, Australia. ' Grameen Health Care Services Ltd., Grameen Bank Bhaban, Dhaka 1216, Bangladesh

Abstract: The removal kinetics of Co(II) by waste tyre rubber granules was deliberated. Rubber granules (150300 µm) were used as sorbent. At the 4 mg/l and 15 g/l concentrations of Co(II) and adsorbent respectively, 83.2% removal was found in 180 min. Reaction kinetic followed a second order equation that was applied for the analysis of rate constant. At 30°C, rate constant was calculated to be 1.25 × 10⁻² min⁻¹. Among different isotherm models, the Freundlich model was found to produce a better regression coefficient. Removal of Co(II) was found to be pH dependent.

Keywords: adsorption dynamics; cobalt; rubber granules; reaction kinetic; removal kinetics; waste rubber; rubber tyres.

DOI: 10.1504/IJEWM.2010.029694

International Journal of Environment and Waste Management, 2010 Vol.5 No.1/2, pp.93 - 103

Published online: 01 Dec 2009 *

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