Nuclear Engineering and Technology

Korean Nuclear Society (한국원자력학회)
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Electrochemical extraction of uranium on the gallium and cadmium reactive electrodes in molten salt

  • Received : 2023.05.03
  • Accepted : 2023.08.30
  • Published : 2024.01.25
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Abstract

The electrochemical extraction of uranium in ternary low melting LiCl-KCl-CsCl eutectic on inert and reactive electrodes via different electrochemical techniques was investigated. It was established that the electrochemical reduction process of U(III) ions on the inert W electrode was irreversible and proceeded in one stage. On reactive liquid Ga and liquid Cd electrodes the reduction of uranium ions took place with the considerable depolarization with the formation of UGa2, UGa3 and UCd11 intermetallic compounds. Thermodynamic characteristics of uranium compounds and alloys were calculated. The conditions for the extraction of uranium from the electrolyte in the form of alloys on both liquid reactive electrodes via potentiostatic electrolysis were found.

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References

  1. World Nuclear Association, Nuclear power in the world today. https://world-nuclear.org/information-library/currentand-future-generation/nuclear-power-in-the-world-today.aspx. (Accessed 6 December 2022). 
  2. D. Sun, J. Xia, Research on road transport planning aiming at near zero carbon emissions: taking ruicheng county as an example, Energy 263 (2023), 125834. 
  3. D.L. Clark, S.S. Hecker, G.D. Jarvinen, M.P. Neu, in: L.R. Morss, N.M. Edelstein, J. Fuger (Eds.), The Chemistry of the Actinide and Transactinide Elements, Springer, Netherlands, Dordrecht, 2008, pp. 813-1264. 
  4. X. Liu, Y. Liu, Y. Wang, D. Yuan, J. Liu, J.W. Chew, Preparation of porous carbon materials by polyphosphazene as precursor for sorption of U(VI), Colloid Interface Sci. 41 (2021), 100387. 
  5. Y. Wang, X. Dong, Y. Liu, Y. Liu, X. Cao, J. Chen, C. Xu, Electrochemical and spectrochemical analysis of U(VI) reduction in nitric acid solutions, J. Electroanal. Chem. 874 (2020), 114482. 
  6. J. Zhang, Electrochemistry of actinides and fission products in molten salts-data review, J. Nucl. Mater. 447 (2014) 271-284.  https://doi.org/10.1016/j.jnucmat.2013.12.017
  7. J.J. Laidler, The IFR pyroprocessing for high-level waste minimization, Trans. Am. Nucl. Soc. 68 (1993) 16-22. 
  8. J. Serp, M. Allibert, A.L. Terrier, R. Malmbeck, M. Ougier, J. Rebizant, J.P. Glatz, Electroseparation of actinides from lanthanides on solid aluminum electrode in LiCl-KCl eutectic melts, J. Electrochem. Soc. 152 (2005) C167-C172.  https://doi.org/10.1149/1.1859812
  9. J.J. Laidler, J.E. Battles, W.E. Miller, J.P. Ackerman, E. Carls, Development of pyroprocessing technology, Prog. Nucl. Energy 31 (1997) 131-140.  https://doi.org/10.1016/0149-1970(96)00007-8
  10. M. Iizuka, T. Koyama, N. Kondo, R. Fujita, H. Tanaka, Actinides recovery from molten salt/liquid metal system by electrochemical methods, J. Nucl. Mater. 247 (2007) 183-190.  https://doi.org/10.1016/S0022-3115(97)00096-2
  11. H. Kim, C. Kwon, S. Ham, J. Lee, S.J. Kim, S. Kim, Physical properties of KCl-UCl3 molten salts as potential fuels for molten salt reactors, J. Nucl. Mater. 577 (2023), 154329. 
  12. S.A. Kuznetsov, H. Hayashi, K. Minato, M. Gaune-Escard, Electrochemical behavior and some thermodynamic properties of UCl4 and UCl3 dissolved in a LiCl-KCl eutectic melt, J. Electrochem. Soc. 152 (2005) C203-C212.  https://doi.org/10.1149/1.1864532
  13. B.P. Reddy, S. Vandarkuzhali, T. Subramanian, P. Venkatesh, Electrochemical studies on the redox mechanism of uranium chloride in molten LiCl-KCl eutectic, Electrochim. Acta 49 (2004) 2471-2478.  https://doi.org/10.1016/j.electacta.2004.02.002
  14. M.H. Xu, V. Smolenski, Q. Liu, A. Novoselova, K.W. Jiang, J. Yu, J.Y. Liu, R. R. Chen, H.S. Zhang, M.L. Zhang, J. Wang, Thermodynamics, solubility and the separation of uranium from cerium in molten In/3LiCl-2KCl system, J. Electrochem. Soc. 167 (2020), 136506. 
  15. K. Serrano, P. Taxil, Electrochemical reduction of trivalent uranium ions in molten chlorides, J. Appl. Electrochem. 29 (1999) 497-503.  https://doi.org/10.1023/A:1003402029895
  16. D. Rappleye, K. Teaford, M.F. Simpson, Investigation of the effects of uranium (III)-chloride concentration on voltammetry in molten LiCl-KCl eutectic with a glass sealed tungsten electrode, Electrochim. Acta 219 (2016) 721-733.  https://doi.org/10.1016/j.electacta.2016.10.075
  17. F. Gao, C. Wang, L. Liu, J. Guo, S. Chang, L. Chan, Y. Ouyang, Electrode processes of uranium ions and electrodeposition of uranium in molten LiCl-KCl, J. Radioanal. Nucl. Chem. 280 (2009) 207-218.  https://doi.org/10.1007/s10967-008-7417-y
  18. T. Koyama, M. Iizuka, N. Kondo, R. Fujita, H. Tanaka, Electrodeposition of uranium in stirred liquid cadmium cathode, J. Nucl. Mater. 247 (1997) 227-231.  https://doi.org/10.1016/S0022-3115(97)00100-1
  19. T. Koyama, M. Iizuka, Y. Shoji, R. Fujita, H. Tanaka, T. Kobayashi, M. Tokiwai, An experimental study of molten salt electrorefining of uranium using solid iron cathode and liquid cadmium cathode for development of pyrometallurgical reprocessing, J. Nucl. Sci. Technol. 34 (1997) 384-393.  https://doi.org/10.1080/18811248.1997.9733678
  20. M. Iizuka, T. Koyama, N. Kondo, R. Fujita, H. Tanaka, Actinides recovery from molten salt/liquid metal system by electrochemical methods, J. Nucl. Mater. 247 (2007) 183-190.  https://doi.org/10.1016/S0022-3115(97)00096-2
  21. T. Yin, K. Liu, Y.L. Liu, Y.D. Yan, G.L. Wang, Z.F. Chai, W.Q. Shi, Electrochemical and thermodynamic properties of uranium on the liquid bismuth electrode in LiCl-KCl eutectic, J. Electrochem. Soc. 165 (2018) D722-D731.  https://doi.org/10.1149/2.0571814jes
  22. K. Liu, H.B. Tang, J.W. Pang, Y.L. Liu, Y.X. Feng, Z.F. Chai, W.Q. Shia, Electrochemical properties of uranium on the liquid gallium electrode in LiCl-KCl eutectic, J. Electrochem. Soc. 163 (2016) D554-D561.  https://doi.org/10.1149/2.1191609jes
  23. H. Moriyama, H. Yamana, S. Nishikawa, Y. Miyashita, K. Moritani, T. Mitsugashira, Equilibrium distributions of actinides and lanthanides in molten chloride salt and liquid zinc binary phase system, J. Nucl. Mater. 247 (1997) 197-202.  https://doi.org/10.1016/S0022-3115(98)00097-X
  24. M. Kurata, Y. Sakamura, T. Matsui, Thermodynamic quantities of actinides and rare earth elements in liquid bismuth and cadmium, J. Alloys Compd. 234 (1996) 83-92.  https://doi.org/10.1016/0925-8388(95)01960-X
  25. J. Zhang, E.A. Lahti, W. Zhou, Thermodynamic properties of actinides and rare earth fission products in liquid cadmium, J. Radioanal. Nucl. Chem. 303 (2015) 1637-1648. 
  26. Y. Sakamura, T. Hijikata, K. Kinoshita, T. Inoue, T.S. Storvick, C.L. Krueger, J. J. Roy, D.L. Grimmett, S.P. Fusselman, R.L. Gay, Measurement of standard potentials of actinides (U, Np, Pu, Am) in LiCl-KCl eutectic salt and separation of actinides from rare earths by electrorefining, J. Alloys Compd. 273 (1998) 592-596.  https://doi.org/10.1016/S0925-8388(98)00166-2
  27. V. Smolenski, A. Novoselova, A. Osipenko, M. Kormilitsyn, Ya. Luk'yanova, Thermodynamics of separation of uranium from neodymium between the gallium-indium liquid alloy and the LiCl-KCl molten salt phases, Electrochim. Acta 133 (2014) 354-358.  https://doi.org/10.1016/j.electacta.2014.04.042
  28. V. Smolenski, A. Novoselova, A. Osipenko, A. Maershin, Thermodynamics and separation factor of uranium from lanthanum in liquid eutectic gallium-indium alloy/molten salt system, Electrochim. Acta 45 (2014) 81-85.  https://doi.org/10.1016/j.electacta.2014.08.081
  29. V. Smolenski, A. Novoselova, V. Volkovich, Ya. Luk'yanova, A. Osipenko, A. Bychkov, T.R. Griffiths, The effect of Al concentration on thermodynamic properties of Nd and U in Ga-Al-based alloys and the separation factor of Nd/U couple in a "molten salt-liquid metal system", J. Radioanal. Nucl. Chem. 311 (2017) 687-693.  https://doi.org/10.1007/s10967-016-5053-5
  30. V. Smolenski, A. Novoselova, P. Mushnikov, A. Osipenko, Study of the electrochemical behavior of U(III) ions on liquid Cd electrode and preparation of the U-Cd intermetallic compound in fused 3LiCl-2KCl eutectic, J. Radioanal. Nucl. Chem. 311 (2017) 127-133.  https://doi.org/10.1007/s10967-016-4932-0
  31. A. Novoselova, V. Smolenski, The influence of the temperature and Ga-In alloy composition on the separation of uranium from neodymium in molten Ga-In/3LiCl-2KCl system during the recycling of high-level waste, J. Nucl. Mater. 509 (2018) 313-317.  https://doi.org/10.1016/j.jnucmat.2018.06.040
  32. V.A. Lebedev, Selectivity of Liquid Metal Electrodes in Molten Halide, Metallurgiya, Chelyabinsk, 1993. 
  33. M.V. Smirnov, Electrode Potentials in Molten Chlorides, Nauka, Moscow, 1973. 
  34. A.J. Bard, L.R. Faulkner, Electrochemical Methods Fundamentals and Applications, John Wiley & Sons, New York, 1980. 
  35. Z. Galus, Theoretical Basis of Electrochemical Analysis, Mir, Moscow, 1974. 
  36. ASM Binary Phase Diagrams, Software ASM International, Copyright USA, 1996, 0-87170-562-1.