Dioxouranium(VI) extraction in microchannels using ionic liquids

Dimitrios Tsaoulidis; Valentina Dore; Panagiota Angeli; Natalia V. Plechkova; Kenneth R. Seddon

doi:10.1016/j.cej.2012.08.064

Dioxouranium(VI) extraction in microchannels using ionic liquids

Dimitrios Tsaoulidis, Valentina Dore, Panagiota Angeli^*, Natalia V. Plechkova, Kenneth R. Seddon

^*Corresponding author for this work

Queen's University Belfast

Research output: Contribution to journal › Article › peer-review

69 Citations (Scopus)

Abstract

The extraction of uranium(VI) from aqueous nitric acid solutions by tributylphosphate {TBP; 30%(v/v)} dissolved in the ionic liquid 1-butyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}amide was investigated. The experiments were performed in a Teflon microchannel of 0.5mm internal diameter, while the dioxouranium(VI) concentrations in the aqueous and the ionic liquid phases were determined by UV-Vis spectroscopy. The effects of initial nitric acid concentration (0.01-3M), residence time, and phase flow rate ratio were studied. It was found that, with increasing nitric acid concentration, the percentage of dioxouranium(VI) extracted decreased and then increased again, while the extraction efficiency followed a slightly different trend. Overall mass transfer coefficients varied between 0.049s^-1 and 0.312s^-1.

Original language	English
Pages (from-to)	151-157
Number of pages	7
Journal	Chemical Engineering Journal
Volume	227
Issue number	3
Early online date	04 Sept 2012
DOIs	https://doi.org/10.1016/j.cej.2012.08.064
Publication status	Published - 01 Jul 2013

Bibliographical note

Keywords

Dioxouranium(VI) nitrate
Ionic liquids
Liquid-liquid extraction
Microchannel
UV-Vis spectroscopy

ASJC Scopus subject areas

General Chemical Engineering
General Chemistry
Industrial and Manufacturing Engineering
Environmental Chemistry

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Cite this

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title = "Dioxouranium(VI) extraction in microchannels using ionic liquids",

abstract = "The extraction of uranium(VI) from aqueous nitric acid solutions by tributylphosphate {TBP; 30%(v/v)} dissolved in the ionic liquid 1-butyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}amide was investigated. The experiments were performed in a Teflon microchannel of 0.5mm internal diameter, while the dioxouranium(VI) concentrations in the aqueous and the ionic liquid phases were determined by UV-Vis spectroscopy. The effects of initial nitric acid concentration (0.01-3M), residence time, and phase flow rate ratio were studied. It was found that, with increasing nitric acid concentration, the percentage of dioxouranium(VI) extracted decreased and then increased again, while the extraction efficiency followed a slightly different trend. Overall mass transfer coefficients varied between 0.049s-1 and 0.312s-1.",

keywords = "Dioxouranium(VI) nitrate, Ionic liquids, Liquid-liquid extraction, Microchannel, UV-Vis spectroscopy",

author = "Dimitrios Tsaoulidis and Valentina Dore and Panagiota Angeli and Plechkova, {Natalia V.} and Seddon, {Kenneth R.}",

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AU - Tsaoulidis, Dimitrios

AU - Dore, Valentina

AU - Angeli, Panagiota

AU - Plechkova, Natalia V.

AU - Seddon, Kenneth R.

PY - 2013/7/1

Y1 - 2013/7/1

N2 - The extraction of uranium(VI) from aqueous nitric acid solutions by tributylphosphate {TBP; 30%(v/v)} dissolved in the ionic liquid 1-butyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}amide was investigated. The experiments were performed in a Teflon microchannel of 0.5mm internal diameter, while the dioxouranium(VI) concentrations in the aqueous and the ionic liquid phases were determined by UV-Vis spectroscopy. The effects of initial nitric acid concentration (0.01-3M), residence time, and phase flow rate ratio were studied. It was found that, with increasing nitric acid concentration, the percentage of dioxouranium(VI) extracted decreased and then increased again, while the extraction efficiency followed a slightly different trend. Overall mass transfer coefficients varied between 0.049s-1 and 0.312s-1.

AB - The extraction of uranium(VI) from aqueous nitric acid solutions by tributylphosphate {TBP; 30%(v/v)} dissolved in the ionic liquid 1-butyl-3-methylimidazolium bis{(trifluoromethyl)sulfonyl}amide was investigated. The experiments were performed in a Teflon microchannel of 0.5mm internal diameter, while the dioxouranium(VI) concentrations in the aqueous and the ionic liquid phases were determined by UV-Vis spectroscopy. The effects of initial nitric acid concentration (0.01-3M), residence time, and phase flow rate ratio were studied. It was found that, with increasing nitric acid concentration, the percentage of dioxouranium(VI) extracted decreased and then increased again, while the extraction efficiency followed a slightly different trend. Overall mass transfer coefficients varied between 0.049s-1 and 0.312s-1.

KW - Dioxouranium(VI) nitrate

KW - Ionic liquids

KW - Liquid-liquid extraction

KW - Microchannel

KW - UV-Vis spectroscopy

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JO - Chemical Engineering Journal

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IS - 3

ER -

Dioxouranium(VI) extraction in microchannels using ionic liquids

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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