Adsorption of UO22+ from aqueous solution onto copolymers of styrene and maleic anhydride

作者：Duan Guojian; Liu Tonghuan^*; Wu Wangsuo; Yang Ying

来源：Journal of Radioanalytical and Nuclear Chemistry, 2013, 295(3): 2193-2201.

DOI：10.1007/s10967-012-2275-z

• Copolymers of styrene and maleic anhydride resin
• Adsorption
• UO22+
• Kinetics

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.

• 出版日期2013-3
• 单位兰州大学