Kinetic modeling and error analysis for zinc removal on a weak base anion exchange resin

摘要

The efficiency of Purolite A103S resin for zinc removal (as zinc chloride complexes) has been studied using different resin quantities and temperatures in a batch adsorption system. The experimental data were analyzed using pseudo-first-order, pseudo-second-order forms, Elovich, and intra-particle diffusion models. Kinetic studies showed that the adsorption followed type 1 pseudo-second-order reaction model. The results obtained from the kinetics models were examined by the most common error functions (e.g. ERRSQ/SSE, HYBRID, ARE, EABS, MPSD(,)r(s), s(RE), S.E., RMSE, APE, and q). Thermodynamic parameters, enthalpy, entropy, and Gibbs free energy were calculated in order to determine the adsorption behavior. The enthalpy value indicated an exothermic reaction. The activation energy value suggested that the process that rules over the zinc sorption on the Purolite A103S resin is physical.