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Extraction and third phase formation behaviour of tri-iso-amyl phosphate and tri-n-butyl phosphate with Zr(IV) and Hf(IV): A comparative study

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Abstract

Distribution ratios for the extraction of Zr(IV) and Hf(IV) as well as third phase formation limits for the extraction of Zr(IV) by solutions of tri-iso-amyl phosphate (TiAP) and tri-n-butyl phosphate (TBP) in n-dodecane have been measured as a function of equilibrium aqueous phase nitric acid concentration at 303 K. The concentrations of the constituents of the organic phases at different equilibrium aqueous phase Zr(IV) concentrations were determined and correlated with the third phase formation tendency of TiAP and TBP. The aggregation behaviour of TiAP and TBP in the extraction of Zr(IV) from its solution in nitric acid media (4.06–4.41 M HNO3) has been compared using small angle neutron scattering technique. Studies indicate the higher third phase formation tendency of TBP as compared to TiAP in the extraction of Zr(IV) from nitric acid media.

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Acknowledgments

The authors are thankful to Dr. B. Prabhakara Reddy, Fuel Chemistry Division/CG, IGCAR and his team for the analysis of water in organic samples. The authors are also thankful to Mr. R. Raja Madhavan, Materials Chemistry Division/CG, IGCAR for providing hafnium oxide.

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Authors and Affiliations

  1. Chemistry Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India

    K. Benadict Rakesh, A. Suresh, N. Sivaraman & P. R. Vasudeva Rao

  2. Solid State Physics Division, Bhabha Atomic Research Centre, Trombay, 400085, India

    V. K. Aswal

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  1. K. Benadict Rakesh
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  2. A. Suresh
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  3. N. Sivaraman
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  5. P. R. Vasudeva Rao
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Correspondence to A. Suresh.

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Benadict Rakesh, K., Suresh, A., Sivaraman, N. et al. Extraction and third phase formation behaviour of tri-iso-amyl phosphate and tri-n-butyl phosphate with Zr(IV) and Hf(IV): A comparative study. J Radioanal Nucl Chem 309, 1037–1048 (2016). https://doi.org/10.1007/s10967-016-4728-2

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