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Synergistic extraction of uranium from acidic sulfate leach liquor using D2EHPA mixed with TOPO

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Abstract

Uranium extraction from sulfate leach liquor acid by D2EHPA and TOPO mixture in kerosene was investigated. The effect of different factors affecting the extraction mechanism such as sulfate leach liquor acid, D2EHPA and TOPO concentrations and temperature have been studied. The mathematical treatment for the obtained date suggested that the composition of synergistic extraction species is (UO2(D)2T). The logarithm of the apparent equilibrium constant, log Kex, of synergistic extraction reaction has been evaluated, to be 3.35 ± 0.1. The effect of temperature on extraction process was investigated and the apparent values of the thermodynamics parameters (∆H, ∆G and ∆S) were 38.2 kJ/mol, −19.1 kJ/mol and 192.5 J/mol respectively.

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Authors and Affiliations

  1. Nuclear Materials Authority, El Maadi, P.O. Box 530, Cairo, Egypt

    M. M. Ali, M. H. Taha & M. M. El-Maadawy

  2. Chemistry Department, Faculty of Science, Zagazig University, Zagazig, Sharqia, Egypt

    H. M. Killa & S. Abd El Wanees

Authors
  1. M. M. Ali
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  2. M. H. Taha
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  3. H. M. Killa
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  4. S. Abd El Wanees
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  5. M. M. El-Maadawy
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Correspondence to M. M. El-Maadawy.

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Ali, M.M., Taha, M.H., Killa, H.M. et al. Synergistic extraction of uranium from acidic sulfate leach liquor using D2EHPA mixed with TOPO. J Radioanal Nucl Chem 300, 963–967 (2014). https://doi.org/10.1007/s10967-014-3094-1

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  • DOI: https://doi.org/10.1007/s10967-014-3094-1

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