Keywords: adsorption thermodynamics, kinetic, nickel (II), adsorption kinetics, adsorption capacity, kinetic modelling, mordenite, nickel removal, water pollution, water treatment
Adsorption thermodynamics and kinetics of nickel (II) ions onto Na-ZSM-5 and mordenite zeolites
The potential to remove nickel (II) ions from water using Na-ZSM-5 and mordenite was thoroughly investigated. The effects of relevant parameters, such as adsorbent dose, ionic concentration, and temperature on nickel (II) adsorption capacity were examined. Compared with the pseudo-first-order kinetic model and the intraparticle diffusion model, these sorption processes all follow the pseudo-second-order kinetic model best. The value of activation energy (Ea) indicated a chemical sorption process involving weak interactions between sorbent and sorbate. Mordenite was found to be a more effective sorbent for the removal of nickel (II) ions.