Removal of Cu(II) and Ni(II) by ion exchange resin in packed rotating cylinder

Abstract

The removal of copper and nickel ions from aqueous solutions was evaluated using an ion-exchange resin, purolite C100-MB packed in a perforated rotating basket reactor. The cation-exchange performance of the resin was determined by batch equilibrium method. The present reactor can replace batch agitated vessel where the resin was fluidized by rotating impeller. The effect of rotational basket speed, pH, contact time, temperature, and coexisting metal ions were demonstrated. The reusability of the resin was also studied to estimate the effectiveness of the purolite C100-MB resin. Equilibrium experimental data were successfully described by Langmuir isotherm models. An empirical design procedure based on sorption equilibrium conditions was used for predicting the size of ion exchange reactor. Experimental data were analyzed according to the surface reaction and intraparticle models. Kinetic experiments demonstrated that experimental data for purolite C100-MB resin obey pseudo-second-order models with rates limited by particle diffusion. Various thermodynamic parameters have been calculated. The sorption process of copper and nickel ions onto purolite C100-MB resin was found to be spontaneous and exothermic process.