Extraction of uranium(VI) from nitric acid medium by 1.1M tri-n-butylphosphate in ionic liquid diluent

Pulletikurthi, Giridhar; Venkatesan, K. A.; Srinivasan, T. G.; Rao, P. R. Vasudeva

doi:10.1007/s10967-005-0785-7

Cited by 147 publications

(84 citation statements)

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“…[4,[10][11][12][13][14] Hydrophobic ILs with the bis(trifluoromethylsulfonyl)imide anion (Tf 2 N À ) are particularly interesting, due to their stability towards water, relatively low viscosity, high conductivity, and good electrochemical and thermal stability. [10,11,[14][15][16] These properties make ILs attractive as replacements for the volatile organic solvents traditionally used in various liquid-liquid extraction processes. In addition, both sc-CO 2 and ILs show good stability towards radiation, [10][11][12][13][14] which is an attractive property that allows them to be used as media for processing radioactive materials.…”

Section: Introductionmentioning

confidence: 99%

Extraction of Uranium from Aqueous Solutions by Using Ionic Liquid and Supercritical Carbon Dioxide in Conjunction

Wang

Sheaff

Yoon

et al. 2009

Chemistry A European J

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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.

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Section: Introductionmentioning

confidence: 99%

Extraction of Uranium from Aqueous Solutions by Using Ionic Liquid and Supercritical Carbon Dioxide in Conjunction

Wang

Sheaff

Yoon

et al. 2009

Chemistry A European J

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“…The extraction of metal species into the upper phase could only be facilitated in the presence of dedicated chelating reagents. [43][44][45] The effect of BmimCl and K 2 HPO 4 on BSA quantification by the Bradford method: After BSA extraction, the upper phase contains large amounts of BmimCl, while the lower phase is rich in K 2 HPO 4 . The effects of these species on the quantification of BSA were therefore investigated.…”

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confidence: 99%

Extraction of Proteins from Biological Fluids by Use of an Ionic Liquid/Aqueous Two‐Phase System

2007

Chemistry A European J

287

178

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An ionic liquid/aqueous two-phase system based on the hydrophilic ionic liquid 1-butyl-3-methylimidazolium chloride (BmimCl) and K(2)HPO(4) has been employed for direct extraction of proteins from human body fluids for the first time. Proteins present at low levels were quantitatively extracted into the BmimCl-rich upper phase with a distribution ratio of about 10 between the upper and lower phase and an enrichment factor of 5. Addition of an appropriate amount of K(2)HPO(4) to the separated upper phase results in a further phase separation, giving rise to an improved enrichment factor of 20. FTIR and UV spectroscopy demonstrated that no chemical (bonding) interactions between the ionic liquid and the protein functional groups were identifiable, while no alterations of the natural properties of the proteins were observed. The partitioning of proteins in the two-phase system was assumed to have been facilitated by the electrostatic potential difference between the coexisting phases, as well as by salting out effects. The system could be applied successfully for the quantification of proteins in human urine after on-line phase separation in a flow system. The use of an ionic liquid, as a green solvent, offers clear advantages over traditional liquid-liquid extractions, in which the use of toxic organic solvents is unavoidable.

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“…13) The n value for the 100 vol% ndodecane system, hereafter defined as n Ã , was 1.3, which is less than the n 0 value of 2 expected from stoichiometry of the complex formation.…”

Section: Resultsmentioning

confidence: 88%

Use of the Nonflammable Hydrofluorocarbon (HFC-43-10mee) and Tri-n-butyl Phosphate (TBP) for Nuclear Fuel Reprocessing: Phase Distribution of Uranyl Nitrate and Irradiation Effect of Co-60 γ-Ray

Yamamura

Ohta

Mori

et al. 2010

Journal of Nuclear Science and Technology

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Extraction of uranium(VI) from nitric acid medium by 1.1M tri-n-butylphosphate in ionic liquid diluent

Cited by 147 publications

References 0 publications

Extraction of Uranium from Aqueous Solutions by Using Ionic Liquid and Supercritical Carbon Dioxide in Conjunction

Extraction of Uranium from Aqueous Solutions by Using Ionic Liquid and Supercritical Carbon Dioxide in Conjunction

Extraction of Proteins from Biological Fluids by Use of an Ionic Liquid/Aqueous Two‐Phase System

Use of the Nonflammable Hydrofluorocarbon (HFC-43-10mee) and Tri-n-butyl Phosphate (TBP) for Nuclear Fuel Reprocessing: Phase Distribution of Uranyl Nitrate and Irradiation Effect of Co-60 γ-Ray

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