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 (kƒ) 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 (Ds) 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.
International Journal of Environment and Waste Management, 2009 Vol.3 No.3/4, pp.297 - 307
Published online: 07 Jun 2009 *Full-text access for editors Access for subscribers Purchase this article Comment on this article