Abstract
The biosorption characteristics of Pb(II) and Cd(II) ions from aqueous solution using the fungus ( Trametes versicolor) biomass were investigated as a function of pH, biomass dosage, contact time, initial metal ion concentration and temperature. Langmuir and Freundlich models were applied to describe the biosorption of the metal ions by fungus ( T. versicolor) biomass. Langmuir model fitted the equilibrium data better than the Freundlich isotherm. The monolayer biosorption capacity of T. versicolor biomass for Pb(II) and Cd(II) ions was found to be 208.3 mg g −1 and 166.6 mg g −1, respectively. The calculated thermodynamic parameters (ΔG°, Δ H° and Δ S°) showed that the biosorption of both metal ions was feasible, spontaneous and endothermic at 303–323 K. Experimental data were also used to study biosorption kinetics using pseudo-first-order, pseudo-second-order and intraparticle diffusion kinetic models. The results showed that the biosorption processes of both metal ions followed well pseudo-second-order kinetics.
Published Version
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