期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2018
卷号：9
期号：3
页码：1075-1085
DOI：10.26872/jmes.2017.9.3.119
出版社：University of Mohammed Premier Oujda
摘要：This study deals with adsorption kinetic, equilibrium and thermodynamic of Cu(II)ions from aqueous solution onto two natural local clays. The adsorbents werecrushed, screened and characterized using different chemical and physicaltechniques like X-ray fluorescence, X-ray diffraction, Fourier transform infrared,etc. The effects of Cu (II) ion concentration, temperature, mass of adsorbents andpH of adsorption have been investigated. The maximum yield of adsorption wasfound in 90% and 30% of clay I and clay II respectively, at the conditions of initialconcentration 500 mg. L-1, adsorbent mass 3 g.L-1, pH 6 and 298 K. They wereexplained by pseudo-second order in kinetic models. The experimental data ofadsorption in equilibrium condition are tested by the isotherm equations likeFreundlich, Langmuir and Dubinin-Radushkevich at different concentrations.Calculated thermodynamic quantities such as free energy (ΔG), the enthalpy (ΔH)and the entropy of adsorption (ΔS) indicate that the adsorption reaction wasspontaneous, endothermic and controlled by physical mechanisms.
