Title: Modelling of batch adsorption of metal ions onto sago waste

Authors: Siew Young Quek, Bushra Al-Duri

Addresses: Department of Chemistry, University of Auckland, Private Bag 92019 Auckland, New Zealand. ' Chemical Engineering, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK

Abstract: Adsorption kinetics of lead, copper and zinc ions onto sago waste were investigated in batch system. A two-resistance mass transfer model, namely the Film-Solid Diffusion Model (FSDM) which consisted of an external resistance and intra-particle resistance was applied to describe the experimental data successfully. The external mass transfer coefficient (k_ƒ) values were 1.85 ×10⁻² ± 4.74% cm/s for Pb/sago waste system, 9.06 × 10⁻³ ± 4.14% cm/s for Cu/sago waste, and 6.08 × 10⁻³ ± 2.43% cm/s for Zn/sago waste system. Solid diffusivity values (D_s) were found to increase with increasing initial metal concentration and decreasing adsorbent mass.

Keywords: FSDM; film-solid diffusion model; metal ions; adsorbent mass; kinetics; external mass transfer; diffusivity; modelling; batch adsorption; sago waste; lead ions; copper ions; zinc ions; solid diffusivity values.

DOI: 10.1504/IJEWM.2009.026346

International Journal of Environment and Waste Management, 2009 Vol.3 No.3/4, pp.297 - 307

Published online: 07 Jun 2009 *

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