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Extraction of thorium(IV) by a mixture of 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone and tri-n-octyl phosphine oxide

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Abstract

The extraction behavior of Th(IV) from dilute nitric as well as perchloric acid medium using 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone (PMBP) and its mixture with tri-n-octyl phosphine oxide (TOPO) was investigated. The species of the type Th(X)(PMBP)3·(HPMBP) and Th(X)(PMBP)3·(TOPO) were extracted for the binary and ternary extraction systems, respectively, where X=NO3− or ClO4−. The presence of 1.25·10−5M Th carrier in the aqueous phase resulted in the extracted species of the type of Th(PMBP)4 and Th(PMBP)4·(TOPO), respectively. The extraction constant (logk ex ) for the binary species Th(PMBP)4 was found to be 6.89±0.01 while the overall extraction constant (logK) for the ternary species Th(PMBP)4·(TOPO) was calculated to be 13.17±0.06.

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Authors and Affiliations

  1. Radiochemistry Division, B. A. R. C., Trombay, 400 085, Mumbai, India

    P. K. Mohapatra, R. Veeraraghavan & V. K. Manchanda

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  1. P. K. Mohapatra
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  2. R. Veeraraghavan
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  3. V. K. Manchanda
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Mohapatra, P.K., Veeraraghavan, R. & Manchanda, V.K. Extraction of thorium(IV) by a mixture of 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone and tri-n-octyl phosphine oxide. J Radioanal Nucl Chem 240, 31–38 (1999). https://doi.org/10.1007/BF02349133

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  • DOI: https://doi.org/10.1007/BF02349133

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