Title: Adsorption thermodynamics and kinetics of nickel (II) ions onto Na-ZSM-5 and mordenite zeolites

Authors: Tao Jin, Dao-Hong Xia, Ming-Xia Liu, Yu-Zhi Xiang, Xi-Qiang Si, Bin Liu, Bin Xu

Addresses: College of Chemistry and Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Rd., Qingdao, China. ' College of Chemistry and Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Rd., Qingdao, China. ' College of Chemistry and Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Rd., Qingdao, China. ' College of Chemistry and Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Rd., Qingdao, China. ' College of Chemistry and Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Rd., Qingdao, China. ' College of Chemistry and Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Rd., Qingdao, China. ' College of Chemistry and Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Rd., Qingdao, China

Abstract: 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 (E_a) 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.

Keywords: adsorption thermodynamics; kinetic; nickel (II); adsorption kinetics; adsorption capacity; kinetic modelling; mordenite; nickel removal; water pollution; water treatment.

DOI: 10.1504/IJEE.2009.027808

International Journal of Environmental Engineering, 2009 Vol.1 No.3, pp.321 - 333

Accepted: 04 Jan 2009
Published online: 11 Aug 2009 *

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