Extraction of Uranium from Aqueous Solutions Using Ionic Liquid and Supercritical Carbon Dioxide in Conjunction
Journal Article
·
· Chemistry - A European Journal, 15(17):4458-4463
Uranyl ions (UO2)2+ in aqueous nitric acid solutions can be extracted into supercritical CO2 (sc-CO2) via an imidazolium-based ionic liquid using tri-n-butylphosphate (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 fiberoptic cell. The form of the uranyl complex extracted into the supercritical CO2 phase was found to be UO2(NO3)2(TBP)2. The extraction results were confirmed by UV/Vis spectroscopy and by neutron activation analysis. This technique could potentially be used to extract other actinides for applications in the field of nuclear waste management.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 974976
- Report Number(s):
- PNNL-SA-60724; NN2001000; TRN: US1002361
- Journal Information:
- Chemistry - A European Journal, 15(17):4458-4463, Vol. 15, Issue 17
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
ACTINIDES
AQUEOUS SOLUTIONS
CARBON DIOXIDE
CHELATING AGENTS
MANAGEMENT
NEUTRON ACTIVATION ANALYSIS
NITRIC ACID
RADIOACTIVE WASTES
SPECTROSCOPY
URANIUM
supercritical carbon dioxide
ionic liquids
uranium extraction
UV/Vis Spectroscopy
fluorescence
ACTINIDES
AQUEOUS SOLUTIONS
CARBON DIOXIDE
CHELATING AGENTS
MANAGEMENT
NEUTRON ACTIVATION ANALYSIS
NITRIC ACID
RADIOACTIVE WASTES
SPECTROSCOPY
URANIUM
supercritical carbon dioxide
ionic liquids
uranium extraction
UV/Vis Spectroscopy
fluorescence