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Extraction of pertechnetate anion as a ligand in metal complexes with tributylphosphate

  • Solvent Extraction
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Abstract

The extraction of the pertechnetate anion has been investigated in the systems tributylphosphate (TBP)—solvent (carbon tetrachloride, n-heptane, chloroform)—metal salt (uranyl nitrate and chloride, thorium nitrate)—ammonium salt. In the absence of a metal, the solvates HTeO4. iTBP (i=4) are extracted, while in the presence of uranium and thorium, the distribution of technetium corresponds to the formation of the mixed complexes: UO2(NO3)(TeO4)·2TBP, UO2Cl(TcO4)·2TBP and Th(NO3)3 (TcO1)·2TBP. The effective constants of the reactions H++TcO −4 +i(TBP)org←(HTcO1·iTBP)org, and (MLn·2TBP)org+TcO −4 ←(MLn−1TcO4·2TBP)org+L were established in the above systems. The extraction of pertechnetate ion is more effective when it is coordinated to a cation solvated by TBP than the extraction in the form of pertechnetate acid solvated by TBP.

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Authors and Affiliations

  1. Department of Nuclear Chemistry, Comenius University, 816 31, Bratislava, (Czechoslovakia)

    F. Macáŝek & J. Kadrabová

Authors
  1. F. Macáŝek
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  2. J. Kadrabová
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Macáŝek, F., Kadrabová, J. Extraction of pertechnetate anion as a ligand in metal complexes with tributylphosphate. J. Radioanal. Chem. 51, 97–106 (1979). https://doi.org/10.1007/BF02519927

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  • DOI: https://doi.org/10.1007/BF02519927

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