Liquid–liquid microflow patterns and mass transfer of radionuclides in the systems Eu(III)/HNO3/DMDBTDMA and U(VI)/HCl/Aliquat® 336

Hellé, Gwendolyne; Mariet, Clarisse; Cote, Gérard

doi:10.1007/s10404-014-1403-1

Cited by 23 publications

(20 citation statements)

References 44 publications

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“…This reaction has been used in several studies with Aliquat ® 336 [1][2][3], with Cyphos IL 101 [4], or in mixture of extractant [5]. Recently, applications in microfluidic extraction were reported [6,7].…”

Section: Introductionmentioning

confidence: 99%

“…Following previous microfluidic studies [6,7], the aim of this work is to study the extraction mechanism of uranyl from HCl solution by Aliquat ® 336 in 1:99 (v:v) 1-decanol:n-dodecane mixture, using TRLS in batch experiments. The luminescence evolution of the extracted uranium, followed in terms of luminescence spectra and decay time, will allow: (i) estimating the symmetry of the extracted complex; (ii) determining both the stoichiometry and extraction constant of the complex through slope analysis; and (iii) varying the temperature of the luminescence acquisition to determine the activation energy of the luminescence process of the extracted complex.…”

Section: Introductionmentioning

confidence: 99%

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Luminescence of uranium(VI) after liquid-liquid extraction from HCl by Aliquat^® 336 in n-dodecane:1-decanol by time-resolved laser-induced luminescence spectroscopy

Reiller

Mariet

2019

Radiochimica Acta

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To investigate the extraction of uranium(VI) in HCl media by Aliquat® 336 in 1:99 (v:v) 1-decanol:n-dodecane mixture, our objective is to identify the complexe(s) in the organic phase by time-resolved laser-induced luminescence spectroscopy (TRLS). The extraction mechanism is supposed to involve the formation of $[U{O_2}Cl_4^{2 - } \cdot {({R_4}{N^ + })_2}]$ in the organic phase. The occurrence of such a species leads to the presence of the ${\rm{U}}{{\rm{O}}_2}{\rm{Cl}}_4^{2 - }$ species in the organic solution, which luminescence shows particular features. The luminescence spectra and decay time evolutions are obtained in the organic phase as a function of HCl concentration in the aqueous phase (0.5–6 M). The extraction of ${\rm{U}}{{\rm{O}}_2}{\rm{Cl}}_4^{2 - }$ is confirmed by the particular spectrum of uranium(VI) in the organic phase, and the typical splitting of the luminescence bands, due to the crystal field effect, is clearly evidenced. The stoichiometry is verified using luminescence intensity variation as a function of the activity of Cl−, and extraction constants are calculated both using the specific interaction theory and Pitzer model. A decomposition of the spectrum of the extracted complex in the organic phase is also proposed. The decay time variation as a function of temperature allows estimating the activation energy of the luminescence process of the extracted complex.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Luminescence of uranium(VI) after liquid-liquid extraction from HCl by Aliquat^® 336 in n-dodecane:1-decanol by time-resolved laser-induced luminescence spectroscopy

Reiller

Mariet

2019

Radiochimica Acta

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“…Microfluidics is an advantageous way of implementing assays for membrane-based extraction, whether for gas-liquid [21] or liquid-liquid interface [17,[22][23][24][25][26]. With regard to a pertraction device, a microfluidic chip offers the advantage of small sample consumption, faster equilibrium and better control over extraction kinetics [22].…”

Section: Experimental Methodsmentioning

confidence: 99%

Effects of porous media on extraction kinetics: Is the membrane really a limiting factor?

Theisen

Penisson

Rey

et al. 2019

Journal of Membrane Science

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Porous media in extraction and especially pertraction are often suspected to add unnecessary diffusive resistance and considerably slow down extraction kinetics. This work presents a miniaturized pertraction device and simulation of diffusive and reactive solute transport. Kinetics are experimentally observed and numerically fitted. Reaction rates-or solute transfer rates-are estimated via this fit on a numerical basis. The work shows that the diffusive resistance created by a porous medium is prevalent only at low distribution coefficients. At high distribution coefficients as is the case of quasi all industrial processes, the porous membrane does not interfere with overall kinetics. Instead, the diffusive resistance is shared between the feed and extraction phases, and the interface transfer, depending on the value of the transfer rate. Overall, this work can be generalize as enabling the measurement of solute transfer rates at the liquid-liquid interface, a key parameter in pertraction and membrane separation which is difficult to measure using classic methods of extraction.

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“…Moreover, recent technological breakthroughs allow to work with automated microsystems which can be used in parallel processing to increase the throughput or in multiplexed processing of separation/purification steps coupled to a detection system [13,14]. There are few examples of microchemical systems that utilize two or more liquid streams with parallel laminar flow in a microchannel for radiochemical applications [15][16][17][18]. Examples include the extraction of uranium (VI) in nitric acid media by tributylphosphate in dodecane or in ionic liquids [19,20].…”

Section: Solvent Extraction 21 State-of-the Art In Solvent Extractiomentioning

confidence: 99%

Analysis of radionuclides in microsystem: application to the selective recovery of ⁵⁵Fe by solvent extraction

Rassou

Mariet

Vercouter

2020

EPJ Nuclear Sci. Technol.

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The minimization of the sample quantities required by analytical laboratories, as well as the increase of the fastness of the analytical operations are emerging axes for improved radiochemical analyses related to D&D issues. Two microsystem-based protocols were developed for the selective recovery of 55Fe from radioactive samples by solvent extraction. Both protocols were tested on iron solutions in two different microchips. The yields of Fe extraction were compared with macroscale batch experiments. Better performances with more than 80% of iron extracted were obtained with the second protocol, which is based on a reactive transfer of the iron cation, and more suited to the use of microchannels and very low contact times. This study already demonstrate the high potential of microfluidic technology to improve analytical operations on D&D samples. This method will further be validated with radioactive samples.

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Liquid–liquid microflow patterns and mass transfer of radionuclides in the systems Eu(III)/HNO3/DMDBTDMA and U(VI)/HCl/Aliquat® 336

Cited by 23 publications

References 44 publications

Luminescence of uranium(VI) after liquid-liquid extraction from HCl by Aliquat^® 336 in n-dodecane:1-decanol by time-resolved laser-induced luminescence spectroscopy

Luminescence of uranium(VI) after liquid-liquid extraction from HCl by Aliquat^® 336 in n-dodecane:1-decanol by time-resolved laser-induced luminescence spectroscopy

Effects of porous media on extraction kinetics: Is the membrane really a limiting factor?

Analysis of radionuclides in microsystem: application to the selective recovery of ⁵⁵Fe by solvent extraction

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Liquid–liquid microflow patterns and mass transfer of radionuclides in the systems Eu(III)/HNO3/DMDBTDMA and U(VI)/HCl/Aliquat® 336

Cited by 23 publications

References 44 publications

Luminescence of uranium(VI) after liquid-liquid extraction from HCl by Aliquat® 336 in n-dodecane:1-decanol by time-resolved laser-induced luminescence spectroscopy

Luminescence of uranium(VI) after liquid-liquid extraction from HCl by Aliquat® 336 in n-dodecane:1-decanol by time-resolved laser-induced luminescence spectroscopy

Effects of porous media on extraction kinetics: Is the membrane really a limiting factor?

Analysis of radionuclides in microsystem: application to the selective recovery of 55Fe by solvent extraction

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Product

Resources

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Luminescence of uranium(VI) after liquid-liquid extraction from HCl by Aliquat^® 336 in n-dodecane:1-decanol by time-resolved laser-induced luminescence spectroscopy

Luminescence of uranium(VI) after liquid-liquid extraction from HCl by Aliquat^® 336 in n-dodecane:1-decanol by time-resolved laser-induced luminescence spectroscopy

Analysis of radionuclides in microsystem: application to the selective recovery of ⁵⁵Fe by solvent extraction