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Influence of the Nature of Diluent on the Extractability of N,N,N',N'-Tetrabutyldiglycolamide for Eu(III), Am(III), and Cm(III)

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Abstract

The effect of HNO3 concentration on the extraction of Eu(III), Am(III), and Cm(III) with N,N,N',N'-tetrabutyldiglycolamide was studied in 5 different diluents: nitrobenzene, toluene, chloroform, 1,2-dichloroethane, and 1,1,2,2-tetrachloroethane. The distribution coefficients of these metals as a function of the nature of the diluent in the following series of compounds was established: nitrobenzene > m-trifluoromethylnitrobenzene > mixture of n-dodecane with decanol-1 (volume ratio 90 : 10) > carbon tetrachloride > 1,2-dichloroethane > benzene > 1,1,2,2-tetrachloroethane > toluene > chloroform. The conditions for the partioning Eu(III)/Am(III) and Am(III)/Cm(III) pairs were found. An explanation was proposed for the observed increase in the separation factors of the Am(III)/Cm(III) pair with increasing concentration of nitric acid in the equilibrium aqueous phase.

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Funding

The work was carried out with partial funding from the Ministry of Science and Higher Education of the Russian Federation within the framework of the State Assignment of the Institute of Physical Chemistry and Chemistry of the Russian Academy of Sciences for 2023, using the equipment of the Centers for Collective Use of the Institute of Physical Chemistry and Chemistry of the Russian Academy of Sciences.

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  1. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 119991, Moscow, Russia

    V. E. Sharov & G. V. Kostikova

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  1. V. E. Sharov
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  2. G. V. Kostikova
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Correspondence to V. E. Sharov.

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Translated from Radiokhimiya, No. 5, pp. 418–426, October, 2023 https://doi.org/10.31857/S0033831123050039

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Sharov, V.E., Kostikova, G.V. Influence of the Nature of Diluent on the Extractability of N,N,N',N'-Tetrabutyldiglycolamide for Eu(III), Am(III), and Cm(III). Radiochemistry 65, 538–546 (2023). https://doi.org/10.1134/S106636222305003X

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