Uranyl ions [UO2](2+) in aqueous nitric acid can be extracted into supercritical CO2 (sc-CO2) by using an imidazolium-based ionic liquid with tri-n-butyl phosphate (TBP) as a complexing agent. The transfer of uranium from the ionic liquid to the supercritical fluid phase was monitored by UV/Vis spectroscopy using a high-pressure fiber-optic cell. The form of the uranyl complex extracted into the sc-CO2 phase was identified to be [UO2(NO3)(2)-(TBP)(2)] The extraction results were confirmed by fluorescence spectroscopy and by neutron activation analysis. This technique has potential applications in the field of nuclear waste management for extracting other actinides.
机构:
Bhabha Atom Res Ctr, Radioanalyt Chem Div, Bombay 400085, Maharashtra, IndiaBhabha Atom Res Ctr, Radioanalyt Chem Div, Bombay 400085, Maharashtra, India
Rao, Ankita
Tomar, B. S.
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Bhabha Atom Res Ctr, Radioanalyt Chem Div, Bombay 400085, Maharashtra, IndiaBhabha Atom Res Ctr, Radioanalyt Chem Div, Bombay 400085, Maharashtra, India
机构:
School of Engineering, Sun Yat-Sen University, Guangzhou, 510006, GuangdongSchool of Engineering, Sun Yat-Sen University, Guangzhou, 510006, Guangdong
Li, Song
Yang, Cuilian
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School of Engineering, Sun Yat-Sen University, Guangzhou, 510006, GuangdongSchool of Engineering, Sun Yat-Sen University, Guangzhou, 510006, Guangdong
Yang, Cuilian
Bi, Yin
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School of Engineering, Sun Yat-Sen University, Guangzhou, 510006, GuangdongSchool of Engineering, Sun Yat-Sen University, Guangzhou, 510006, Guangdong
Bi, Yin
Guo, Kaihua
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School of Engineering, Sun Yat-Sen University, Guangzhou, 510006, GuangdongSchool of Engineering, Sun Yat-Sen University, Guangzhou, 510006, Guangdong