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Selective extraction of plutonium(IV) over uranium(VI), americium(III), europium(III) and zirconium(IV) with bidentate O-phenoxydiamide ligands: experimental and theoretical study

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Abstract

The performance of a series of novel O-phenoxydiamides extracting Zr(IV), Eu(III), U(VI), Pu(IV) and Am(III) was studied. The result of extraction experiments showed that the coordination abilities of these five congeneric O-phenoxydiamides decrease in the order of CycleDODA > PhenylDODA > ButylDODA > HexylDODA > BenzoDODA, the abilities of different metal ions coordinating with the same ligand decrease in the order of Pu(IV) ≫ U(VI) > Zr(IV), Eu(III), Am(III). At HNO3 concentration of 5.0 mol/L, the distribution ratio of BenzoDODA/n-dodecane extracting Pu(IV) is much larger than those of other metal ions, the separation factors of Pu(IV) over Eu(III), Zr(IV), U(VI) and Am(III) are between 20 and 300, which can be used for recovering Pu(IV) selectively from highly acidic liquid waste. The density functional theory (DFT) calculation of the 25 complexes in geometrical structure, Mayer bond order (MBO) and energy was further studied, the result is consistent with the experimental result.

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Acknowledgements

This work was supported by the Major Program “Research on Actinide Chemistry in the Complex System of Spent Fuel Reprocessing” of the National Natural Science Foundation of China (Grant 21790370).

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Authors and Affiliations

  1. Department of Radiochemistry, China Institute of Atomic Energy, P. O. Box 275 (26), Beijing, 102413, P. R. China

    Cong Huang, Hongbin Lv, Chen Zuo, Zhongwei Yuan, Weifang Zheng & Taihong Yan

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  1. Cong Huang
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  2. Hongbin Lv
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  3. Chen Zuo
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Correspondence to Taihong Yan.

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Huang, C., Lv, H., Zuo, C. et al. Selective extraction of plutonium(IV) over uranium(VI), americium(III), europium(III) and zirconium(IV) with bidentate O-phenoxydiamide ligands: experimental and theoretical study. J Radioanal Nucl Chem 317, 103–110 (2018). https://doi.org/10.1007/s10967-018-5836-y

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  • DOI: https://doi.org/10.1007/s10967-018-5836-y

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