Abstract
The copolymers of styrene and maleic anhydride resin (PSt/MA) was synthesized by free radical polymerization and characterized by means of FTIR. It is shown that the PSt/MA copolymer has rather strong coordination ability to UO2 2+ ions by chelation with the carboxylate group, and the microstructures of the U(VI)-PSt/MA complexes can be well controlled. The influence factors on UO2 2+ ions were also investigated and described in detail, such as contact time, solid/liquid ratio, pH value, ethanol content, and initial concentration. It was found that the maximum adsorption quantity of UO2 2+ was 831 mg/g. Experiments show that PSt/MA can recover UO2 2+ ions with high adsorption selectively from a simulated industry solution containing Ca2+ and Mg2+ as impurities. The adsorption kinetic data were best described by the pseudo-second-order equation, indicating that the chemical adsorption was the rate-limiting step. And there are very good correlation coefficients of linearized equations for Langmuir model, which indicated that the sorption isotherm of the PSt/MA for UO2 2+ can be fitted to the Langmuir model. After five times of repeated tests for the hydrogel it still remained its excellent adsorption.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (No. J1030932 and No. J51074083), Specialized Research Fund for the Doctoral Program of Higher Education (No. 20110211120038) and Fundamental Research Funds for the Central Universities (lzujbky-2012-64).
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Guojian, D., Tonghuan, L., Wangsuo, W. et al. Adsorption of UO2 2+ from aqueous solution onto copolymers of styrene and maleic anhydride. J Radioanal Nucl Chem 295, 2193–2201 (2013). https://doi.org/10.1007/s10967-012-2275-z
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DOI: https://doi.org/10.1007/s10967-012-2275-z