Second Order Kinetic Model for the Adsorption of Cobalt(II) Ions onto Two Cameroonian Clays: Kaolinite and Smectite

Article type: Research Article

Authors: Ngomo, Horace Manga | Abi, Charles Fon | Tuemgnie, Gaëlle Tatiana Ngnie | Tsobnang, Patrice Kenfack | Mbadcam, Joseph Ketcha

Affiliations: Physical and Theoretical Chemistry Laboratory, Faculty of Science, University of Yaoundé 1 P.O. Box 812, Yaoundé, Cameroon | Department of Chemistry, Higher Teachers' Training College, University of Yaoundé 1 P.O. Box 47, Yaoundé, Cameroon

Note: [] Corresponding author. E-mail: ngomo43@yahoo.co.uk

Abstract: The removal of Co(II) ions by two Cameroon clays – kaolinite and smectite as adsorbents – was investigated in a batch system. The effect of Co(II) ions initial concentration, Co, pH and contact time, t, has been studied in terms of kinetic models. The experimental data fitted well the pseudo-second order kinetic model allowing the rate constant to be evaluated. This study shows that these clays could be used as important efficient adsorbent materials for the uptake of Co(II) ions from aqueous solution at low initial concentrations. This study is important for the treatment of Co(II) ions effluent where continuous removal can be achieved on a large scale.

Keywords: Adsorption, cobalt(II) ions, kinetic models, kaolinite, smectite

Journal: Asian Journal of Water, Environment and Pollution, vol. 9, no. 3, pp. 37-43, 2012