Extraction of uranium from aqueous solutions by using ionic liquid and supercritical carbon dioxide in conjunction. Wang, J. S., Sheaff, C. N., Yoon, B., Addleman, R. S., & Wai, C. M. Chemistry - A European Journal, 15(17):4458–4463, Univ Idaho, Dept Chem, Moscow, ID 83844 USA Pacific NW Natl Lab, Richland, WA 99352 USA, 2009.
doi  abstract   bibtex   
Uranyl ions [UO(2)](2+) in aqueous nitric acid can be extracted into supercritical CO(2) (sc-CO(2)) 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-CO(2) phase was identified to be [UO(2)(NO(3))(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.
@article{Wang2009,
abstract = {Uranyl ions [UO(2)](2+) in aqueous nitric acid can be extracted into supercritical CO(2) (sc-CO(2)) 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-CO(2) phase was identified to be [UO(2)(NO(3))(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.},
address = {Univ Idaho, Dept Chem, Moscow, ID 83844 USA Pacific NW Natl Lab, Richland, WA 99352 USA},
annote = {442xt
Times Cited:46
Cited References Count:22},
author = {Wang, Joanna Shaofen and Sheaff, Chrystal N. and Yoon, Byunghoon and Addleman, R. Shane and Wai, Chien M.},
doi = {10.1002/chem.200801415},
issn = {15213765},
journal = {Chemistry - A European Journal},
keywords = {Carbon dioxide,Ionic liquids,Published,Supercritical fluids,UV/Vis spectroscopy,Uranium,carbon dioxide ionic liquids supercritical fluids},
language = {English},
mendeley-tags = {Published},
number = {17},
pages = {4458--4463},
title = {{Extraction of uranium from aqueous solutions by using ionic liquid and supercritical carbon dioxide in conjunction}},
volume = {15},
year = {2009}
}

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