Adsorption of uranium(VI) from aqueous solution by diethylenetriamine-functionalized magnetic chitosan |
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| Authors: | Jinsheng Xu Mansheng Chen Chunhua Zhang Zhengji Yi |
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| Institution: | 1. Department of Chemistry and Material Sciences, Key Laboratory of Functional Organometallic Materials of Hengyang Normal University, College of Hunan Province, Huangbai Road No. 165, Hengyang, 421008, Hunan, China
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| Abstract: | In this paper, the modified magnetic chitosan resin containing diethylenetriamine functional groups (DETA-MCS) was used for the adsorption of uranium ions from aqueous solutions. The influence of experimental conditions such as contact time, pH value and initial uranium(VI) concentration was studied. The Langmuir, Freundlich, Sips and Dubinin–Radushkevich equations were used to check the fitting of adsorption data to the equilibrium isotherm. The best fit for U(VI) was obtained with the Sips model. Adsorption kinetics data were tested using pseudo-first-order and pseudo-second-order models. Kinetic studies showed that the adsorption followed the pseudo-second-order kinetic model, indicating that the chemical adsorption was the rate-limiting step. The present results suggest that DETA-MCS is an adsorbent for the efficient removal of uranium(VI) from aqueous solution. |
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