Abstract
U(VI)-containing wastewater has potential radiation hazard to the environment, but contains valuable uranium resource. Based on the reduction of U(VI) and the difference in solubility between U(VI) and U(IV), here we construct a TiO2-based photoelectrochemical cell to remove U(VI) and recover uranium from aqueous solution. By irradiating TiO2 photoanode at E = 0.45 V versus SCE, U(VI) can be simultaneously removed from aqueous solution and recovered as solid uranium compounds on a FTO glass cathode. Since ethanol can act as hole scavenger to protect the formed U(IV) and provide CO −·2 as reductant, ethanol adding improved the U(VI) reduction efficiency of TiO2-based photoelectrochemical cell.
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Acknowledgements
This work was supported by the National Basic Research Program of China (973 Program: 2014CB846003), Applied Basic Research Programs of Science and Technology Department of Sichuan Province (2017JY0146), National Undergraduate Training Programs for Innovation and Entrepreneurship (201610619015), Science and Technology Program of Hebei Province (D2016403064, 16044601Z), Xinjiang Science Fund of Outstanding Young Scholars (15211121), China Postdoctoral Science Foundation funded project (2016M592698) and Cooperative Research Fund of Guangdong Provincial Key Laboratory of Mineral Physics and Materials (GLMPM-019).
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He, H., Zong, M., Dong, F. et al. Simultaneous removal and recovery of uranium from aqueous solution using TiO2 photoelectrochemical reduction method. J Radioanal Nucl Chem 313, 59–67 (2017). https://doi.org/10.1007/s10967-017-5278-y
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DOI: https://doi.org/10.1007/s10967-017-5278-y