"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Removal of heavy-metal ion by adsorption on chitosan gel beads

E. LEMRABET1, K. JAAFARI1, K. BENKHOUJA1,* , M. TOUAIHER1, M. BAKASSE2, B. SAHRAOUI3, S. TOUHTOUH4, A. SOUFIÁNE5

Affiliation

  1. EMNED, Chemistry Department, Faculty of Sciences, UCD University, BP 20-24000, El Jadida, Morocco
  2. LMCO, Chemistry Department, Faculty of Sciences, UCD University, BP 20-24000, El Jadida, Morocco
  3. MINOS, University of Angers, Institute of sciences and molecular technologies of Angers MOLTECH Anjou - UMR CNRS 6200, 2 Bd Lavoisier 49045 ANGERS cedex2, France
  4. ENSAj, UCD University, El Jadida, Morocco
  5. LCCA, Chemistry Department, Faculty of Sciences, UCD University, BP 20-24000, El Jadida, Morocco

Abstract

The adsorption of heavy metal ions Co2+, Pb2+, and Cd2+ into the Cross-linking chitosan gel beads has been investigated. Batch experiments were carried out as a function of pH, agitation period, and concentration of heavy metal ions. It was shown that the adsorption of Co2+, Pb2+ and Cd2+ ions occurred only at the optimum pH. Kinetic studies showed that the optimum agitation periods for adsorption of Pb2+, Cd2+ and Co2+ ions were about 20 min, 30 min and 40 min, respectively. Langmuir and Freundlich equations were used for analysing the experimental data, which showed a better fit to the Langmuir model. Equilibrium parameters of adsorption were determined for both models. Maximum adsorption capacities for Cobalt, Cadmium and Lead were 73.98, 68.52 and 78.67 (mg.g-1), respectively. The high amounts of adsorbed heavy metal ions demonstrates the great efficiency of cross-linked chitosan gel beads which can be considered as an alternative material for the removal of metal ions from polluted water..

Keywords

Chitosan gel beads, heavy metal ions, Langmuir model, Adsorption.

Submitted at: Sept. 28, 2013
Accepted at: Nov. 7, 2013

Citation

E. LEMRABET, K. JAAFARI, K. BENKHOUJA, M. TOUAIHER, M. BAKASSE, B. SAHRAOUI, S. TOUHTOUH, A. SOUFIÁNE, Removal of heavy-metal ion by adsorption on chitosan gel beads, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 11-12, pp. 1298-1302 (2013)