Abstract
Abstract During this work, we have been able to eliminate and/or reduce the nickel-type (Ni2+) heavy metals contained in the wastewater-model samples by the adsorption technique on natural clay as mineral adsorbent. The present clay was taken from the Ain Dorrij - Ouezzane region of Morocco and characterized by X - Ray Diffraction (RDX) and then applied to the adsorption of the nickel element. The physicochemical parameters such as the pH, the temperature and the concentration of the prepared aqueous samples (nickel adsorption rate (Atomic Adsorption Spectroscopy (AAS)) were optimized as well as for the mass of adsorbent (clay), time and stirring speed. The results obtained during this study have shown that the nickel removal rate is of the order of 70-75% according to the linear forms of the isothermal models (Langmuir and Freundlich) of the adsorption kinetics in a range of time between 30 and 130 min.
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