A study of cerium extraction kinetics by TODGA in acidified and non-acidified organic solvent phases in the context of fission product management

Bromley, Michael A.; Boxall, Colin

doi:10.15669/pnst.5.70

Cited by 2 publications

(1 citation statement)

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“…In the literature, kinetic data are extremely scarce concerning the transfer of trivalent lanthanide and actinide ions from nitric acid solutions (as commonly used in nuclear reprocessing) by the reference extractants TODGA and CyMe 4 -BTBP in molecular solvents. To our best knowledge, two papers have been published in the case of TODGA, about the extraction of Am(III) (using a Lewis cell) and that of Ce(III) (using a rotating diffusion cell). Besides, one finds a publication in which TODGA was dissolved in an ionic liquid for the extraction of Eu(III) .…”

Section: Introductionmentioning

confidence: 99%

Liquid/Liquid Extraction Kinetics of Eu(III) and Am(III) by Extractants Designed for the Industrial Reprocessing of Nuclear Wastes

Simonin

Rollet

et al. 2020

Ind. Eng. Chem. Res.

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Results about the kinetics of extraction of Eu(III) and Am(III) by extractants designed for the industrial reprocessing of nuclear wastes are reported. They were obtained using the rotating membrane cell technique (RMC). Extraction and stripping kinetic rate constants were determined for various compositions of the aqueous and organic phases. The transfer was studied at liquid/liquid interfaces between an aqueous nitric acid solution and an organic solvent containing the diglycolamide extractant molecule TODGA, or a mixture of the bipyridine molecule CyMe 4 BTBP with TODGA (the latter being used as a phase-transfer catalyst), dissolved in an aliphatic diluent. In some experiments, an aqueous ligand (a sulfonated bis triazinyl pyridine, SO 3-Ph-BTP, 1 or a PyTri-diol) was added to the aqueous phase as a stripping agent. The diffusion coefficients of Eu(III) and Am(III), that are key in the analysis of the kinetic data, were measured using the RMC and the closed capillary technique. Whenever possible, mechanisms are proposed to interpret the experimental results.

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Section: Introductionmentioning

confidence: 99%