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Liquid–liquid extraction of trivalent americium from carbonate and carbonate–peroxide aqueous solutions by methyltrioctylammonium carbonate in toluene

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Abstract

Liquid–liquid extraction (LLE) of microamounts of americium(III) from Na2CO3 and Na2CO3–H2O2 aqueous solution using methyltrioctylammonium (MTOA) carbonate in toluene has been studied. The distribution ratio of americium(III) into the organic phase can reach values of > 200 from aqueous phases of dilute Na2CO3 and H2O2. With an increase in concentration of Na2CO3 and H2O2 the value of distribution ratio of americium(III) decreases. The stoichiometry of the extracted species of americium(III) was determined on the basis of the slope analysis method. The extracted species are R4N[Am(CO3)2] and (R4N)3[Am(CO3)3], where R4N is MTOA.

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Acknowledgements

The work was supported by Dmitry Mendeleev University of Chemical Technology of Russia. Project No. 008-2018.

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Authors and Affiliations

  1. Dmitry Mendeleev University of Chemical Technology of Russia, Miusskaya Square 9, Moscow, Russian Federation, 125047

    Alexander V. Boyarintsev, Sergei I. Stepanov & Alexander M. Chekmarev

  2. A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky Prospect 31/4, Moscow, Russian Federation, 119071

    Galina V. Kostikova, Sergei I. Stepanov, Alexander M. Chekmarev & Aslan Yu. Tsivadze

  3. Miusskaya Square 9, Moscow, Russian Federation, 125047

    Alexander V. Boyarintsev

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  1. Alexander V. Boyarintsev
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  2. Galina V. Kostikova
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Correspondence to Alexander V. Boyarintsev.

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Boyarintsev, A.V., Kostikova, G.V., Stepanov, S.I. et al. Liquid–liquid extraction of trivalent americium from carbonate and carbonate–peroxide aqueous solutions by methyltrioctylammonium carbonate in toluene. J Radioanal Nucl Chem 324, 1031–1038 (2020). https://doi.org/10.1007/s10967-020-07162-0

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  • DOI: https://doi.org/10.1007/s10967-020-07162-0

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