Valorization of Moroccan clay: Application to the adsorption of cobalt ions contained in wastewater synthesized

Abstract

In this study, we were able to reduce the content of cobalt ions Co2+ contained in wastewater by the natural clay of El Oulja-Sale region Moroccan as an inorganic adsorbent. The different effects of the experimental parameters on the adsorption kinetics were studied, namely, the different masses of adsorbent, the initial concentrations of cobalt ions, the contact time, the rate of stirring and the pH of prepared solutions. The results of the studied parameters in the removal of cobalt ions have been recorded in the following values: 3 g per mass of adsorbent, 200 mg/l of the concentration of cobalt ions, 400 tr/min of speed agitation, 2 fortunes for the contact time and pH equal to 6. According to the adsorption kinetics study and according to the adsorption equations of Langmuir and Freundlich whose linear forms, it was shown that the maximum amount adsorbed of the studied ions metals have been validated by the linear models of Langmuir and Freundlich isotherms.