Author： Zhang Hongxia Liu Zhi Hu Peizhuo Liu Tonghuan Wu Wangsuo
Publisher： Springer Publishing Company
ISSN： 0236-5731
Source： Journal of Radioanalytical and Nuclear Chemistry, Vol.298, Iss.1, 2013-10, pp. : 611-619
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Abstract
Adsorption of U(VI) on purified kaolin was studied by batch methods under ambient conditions, including contact time, pH, fulvic acid, etc. Three kinetic models were used to model the kinetic adsorption which was very well described by the pseudo-second-order rate equation, and the activation energy of adsorption was 52.20 kJ/mol. The Freundlich and Dubinin–Radushkevich models fitted the experimental data better than the Langmuir model for the adsorption and desorption isotherms. The thermodynamic parameters indicated that the adsorption of U(VI) on kaolin was an endothermic and spontaneous process.
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