Separation of actinides from lanthanides associated with spent nuclear fuel reprocessing in China: current status and future perspectives

References

1. International Atomic Energy Agency. Spent fuel reprocessing options. International Atomic Energy Agency, Vienna, Austria (2009).Search in Google Scholar

2. Hudson, M. J., Harwood, L. M., Laventine, D. M., Lewis, F. W.: Use of soft heterocyclic N-Donor ligands to separate actinides and lanthanides. Inorg. Chem. 52, 3414 (2013).10.1021/ic3008848Search in Google Scholar PubMed

3. Panak, P. J., Geist, A.: Complexation and extraction of trivalent actinides and lanthanides by triazinylpyridine N-Donor ligands. Chem. Rev. 113, 1199 (2013).10.1021/cr3003399Search in Google Scholar PubMed

4. Kolarik, Z.: Complexation and separation of lanthanides(III) and actinides(III) by heterocyclic N-donors in solutions. Chem. Rev. 108, 4208 (2008).10.1021/cr078003iSearch in Google Scholar PubMed

5. Nash, K. L., Madic, C., Mathur, J. N., Lacquement, J.: Actinide separation science and technology. In: L. R. Morss, N. M. Edelstein, J. Fuger (Eds.), The Chemistry of the Actinide and Transactinide Elements. Springer Netherlands, Dordrecht (2011), p. 2622.10.1007/978-94-007-0211-0_24Search in Google Scholar

6. Ekberg, C., Fermvik, A., Retegan, T., Skarnemark, G., Foreman, M., Hudson, M., Englund, S., Nilsson, M.: An overview and historical look back at the solvent extraction using nitrogen donor ligands to extract and separate An (III) from Ln (III). Radiochim. Acta 96, 225 (2008).10.1524/ract.2008.1483Search in Google Scholar

7. Neidig, M. L., Clark, D. L., Martin, R. L.: Covalency in f-element complexes. Coord. Chem. Rev. 257, 394 (2013).10.1016/j.ccr.2012.04.029Search in Google Scholar

8. Vallet, V., Macak, P., Wahlgren, U., Grenthe, I.: Actinide chemistry in solution, quantum chemical methods and models. Theor. Chem. Acc. 115, 145 (2006).10.1007/s00214-005-0051-7Search in Google Scholar

9. Schreckenbach, G., Shamov, G. A.: Theoretical actinide molecular science. Accounts Chem. Res. 43, 19 (2010).10.1021/ar800271rSearch in Google Scholar PubMed

10. Kaltsoyannis, N., Hay, P. J., Li, J., Blaudeau, J.-P., Bursten, B. E. Theoretical studies of the electronic structure of compounds of the actinide elements. In: L. R. Morss, N. M. Edelstein, J. Fuger (Eds.), The Chemistry of the Actinide and Transactinide Elements. Springer Netherlands, Dordrecht, (2011), p. 1893.10.1007/978-94-007-0211-0_17Search in Google Scholar

11. Pepper, M., Bursten, B. E.: The Electronic-structure of actinide-containing molecules – a challenge to applied quantum-chemistry. Chem. Rev. 91, 719 (1991).10.1021/cr00005a005Search in Google Scholar

12. Lan, J. H., Shi, W. Q., Yuan, L. Y., Zhao, Y. L., Li, J., Chai, Z. F.: Trivalent actinide and lanthanide separations by tetradentate nitrogen ligands: a quantum chemistry study. Inorg. Chem. 50, 9230 (2011).10.1021/ic200078jSearch in Google Scholar PubMed

13. Lan, J. H., Shi, W. Q., Yuan, L. Y., Feng, Y. X., Zhao, Y. L., Chai, Z. F.: Thermodynamic study on the complexation of Am(III) and Eu(III) with tetradentate nitrogen ligands: a probe of complex species and reactions in aqueous solution. J. Phys. Chem. A 116, 504 (2012).10.1021/jp206793fSearch in Google Scholar PubMed

14. Lan, J. H., Shi, W. Q., Yuan, L. Y., Li, J., Zhao, Y. L., Chai, Z. F.: Recent advances in computational modeling and simulations on the An(III)/Ln(III) separation process. Coord. Chem. Rev. 256, 1406 (2012).10.1016/j.ccr.2012.04.002Search in Google Scholar

15. Xiao, C. L., Wang, C. Z., Lan, J. H., Yuan, L. Y., Zhao, Y. L., Chai, Z. F., Shi, W. Q.: Selective separation of Am(III) from Eu(III) by 2,9-Bis(dialkyl-1,2,4-triazin-3-yl)-1,10-phenanthrolines: a relativistic quantum chemistry study. Radiochim. Acta 102, 875 (2014).10.1515/ract-2014-2246Search in Google Scholar

16. Lan, J. H., Wang, C. Z., Wu, Q. Y., Wang, S. A., Feng, Y. X., Zhao, Y. L., Chai, Z. F., Shi, W. Q.: A Quasi-relativistic density functional theory study of the Actinyl(VI, V) (An=U, Np, Pu) complexes with a six-membered macrocycle containing Pyrrole, Pyridine, and Furan subunits. J. Phys. Chem. A 119, 9178 (2015).10.1021/acs.jpca.5b06370Search in Google Scholar PubMed

17. Wu, H., Wu, Q. Y., Wang, C. Z., Lan, J. H., Liu, Z. R., Chai, Z. F., Shi, W. Q.: Theoretical insights into the separation of Am(III) over Eu(III) with PhenBHPPA. Dalton Trans. 44, 16737 (2015).10.1039/C5DT02528ASearch in Google Scholar PubMed

18. Wu, H., Wu, Q. Y., Wang, C. Z., Lan, J. H., Liu, Z. R., Chai, Z. F., Shi, W. Q.: New insights into the selectivity of four 1,10-phenanthroline-derived ligands toward the separation of trivalent actinides and lanthanides: a DFT based comparison study. Dalton Trans. 45, 8107 (2016).10.1039/C6DT00296JSearch in Google Scholar PubMed

19. Kong, X. H., Wu, Q. Y., Wang, C. Z., Lan, J. H., Chai, Z. F., Nie, C. M., Shi, W. Q.: Insight into the extraction mechanism of americium(III) over Europium(III) with pyridylpyrazole: a relativistic quantum chemistry study. J. Phys. Chem. A 122, 4499 (2018).10.1021/acs.jpca.8b00177Search in Google Scholar PubMed

20. Lewis, F. W., Harwood, L. M., Hudson, M. J., Drew, M. G. B., Desreux, J. F., Vidick, G., Bouslimani, N., Modolo, G., Wilden, A., Sypula, M., Vu, T.-H., Simonin, J.-P.: Highly efficient separation of actinides from lanthanides by a phenanthroline-derived bis-triazine ligand. J. Am. Chem. Soc. 133, 13093 (2011).10.1021/ja203378mSearch in Google Scholar PubMed

21. Xiao, C. L., Wu, Q. Y., Wang, C. Z., Zhao, Y. L., Chai, Z. F., Shi, W. Q.: Design criteria for tetradentate phenanthroline-derived heterocyclic ligands to separate Am(III) from Eu(III). Sci. China Chem. 57, 1439 (2014).10.1007/s11426-014-5215-7Search in Google Scholar

22. Huang, P. W., Wang, C. Z., Wu, Q. Y., Lan, J. H., Song, G., Chai, Z. F., Shi, W. Q.: Understanding Am3+/Cm3+ separation with H(4)TPAEN and its hydrophilic derivatives: a quantum chemical study. Phys. Chem. Chem. Phys. 20, 14031 (2018).10.1039/C7CP08441BSearch in Google Scholar

23. Huang, P. W., Wang, C. Z., Wu, Q. Y., Lan, J. H., Song, G., Chai, Z. F., Shi, W. Q.: Uncovering the impact of ‘capsule’ shaped amine-type ligands on Am(III)/Eu(III) separation. Phys. Chem. Chem. Phys. 20, 1030 (2018).10.1039/C7CP05381ASearch in Google Scholar PubMed

24. Xiao, C. L., Wang, C. Z., Yuan, L. Y., Li, B., He, H., Wang, S., Zhao, Y. L., Chai, Z. F., Shi, W. Q.: Excellent selectivity for actinides with a Tetradentate 2,9-Diamide-1,10-phenanthroline ligand in highly acidic solution: a hard-soft donor combined strategy. Inorg. Chem. 53, 1712 (2014).10.1021/ic402784cSearch in Google Scholar PubMed

25. Xiao, C. L., Wang, C. Z., Mei, L., Zhang, X. R., Wall, N., Zhao, Y. L., Chai, Z. F., Shi, W. Q.: Europium, uranyl, and thorium-phenanthroline amide complexes in acetonitrile solution: an ESI-MS and DFT combined investigation. Dalton Trans. 44, 14376 (2015).10.1039/C5DT01766ASearch in Google Scholar

26. Xiao, C. L., Wu, Q. Y., Mei, L., Yuan, L. Y., Wang, C. Z., Zhao, Y. L., Chai, Z. F., Shi, W. Q.: High selectivity towards small copper ions by a preorganized phenanthroline-derived tetradentate ligand and new insight into the complexation mechanism. Dalton Trans. 43, 12470 (2014).10.1039/C4DT01489HSearch in Google Scholar

27. Zhang, X. R., Yuan, L. Y., Chai, Z. F., Shi, W. Q.: A new solvent system containing N,N′-diethyl-N,N′-ditolyl-2,9-diamide-1,10-phenanthroline in 1-(trifluoromethyl)-3-nitrobenzene for highly selective UO22+ extraction. Sep. Purif. Technol. 168, 232 (2016).10.1016/j.seppur.2016.05.056Search in Google Scholar

28. Xiao, C. L., Wu, Q. Y., Wang, C. Z., Zhao, Y. L., Chai, Z. F., Shi, W. Q.: Quantum chemistry study of uranium(VI), neptunium(V), and plutonium(IV,VI) complexes with preorganized tetradentate phenanthrolineamide ligands. Inorg. Chem. 53, 10846 (2014).10.1021/ic500816zSearch in Google Scholar PubMed

29. Wu, Q. Y., Song, Y. T., Ji, L., Wang, C. Z., Chai, Z. F., Shi, W. Q.: Theoretically unraveling the separation of Am(III)/Eu(III): insights from mixed N,O-donor ligands with variations of central heterocyclic moieties. Phys. Chem. Chem. Phys. 19, 26969 (2017).10.1039/C7CP04625ASearch in Google Scholar PubMed

30. Wang, C. Z., Shi, W. Q., Lan, J. H., Zhao, Y. L., Wei, Y. Z., Chai, Z. F.: Complexation behavior of Eu(III) and Am(III) with CMPO and Ph2CMPO ligands: insights from density functional theory. Inorg. Chem. 52, 10904 (2013).10.1021/ic400895dSearch in Google Scholar PubMed

31. Wang, C. Z., Lan, J. H., Wu, Q. Y., Zhao, Y. L., Wang, X. K., Chai, Z. F., Shi, W. Q.: Density functional theory investigations of the trivalent lanthanide and actinide extraction complexes with diglycolamides. Dalton Trans. 43, 8713 (2014).10.1039/c4dt00032cSearch in Google Scholar PubMed

32. Luo, J., Wang, C. Z., Lan, J. H., Wu, Q. Y., Zhao, Y. L., Chai, Z. F., Nie, C. M., Shi, W. Q.: Theoretical studies on the AnO(2)(n+) (An=U, Np; n=1, 2) complexes with di-(2-ethylhexyl) phosphoric acid. Dalton Trans. 44, 3227 (2015).10.1039/C4DT03321CSearch in Google Scholar PubMed

33. Luo, J., Wang, C. Z., Lan, J. H., Wu, Q. Y., Zhao, Y. L., Chai, Z. F., Nie, C. M., Shi, W. Q.: Theoretical studies on the complexation of Eu(III) and Am(III) with HDEHP: structure, bonding nature and stability. Sci. China Chem. 59, 324 (2016).10.1007/s11426-015-5489-4Search in Google Scholar

34. Huang, P. W., Wang, C. Z., Wu, Q. Y., Lan, J. H., Song, G., Chai, Z. F., Shi, W. Q.: Theoretical studies on the synergistic extraction of Am3+ and Eu3+ with CMPO-HDEHP and CMPO-HEH EHP systems. Dalton Trans. 47, 5474 (2018).10.1039/C8DT00134KSearch in Google Scholar

35. Su, L. L., Liu, K., Liu, Y. L., Wang, L., Yuan, L. Y., Wang, L., Li, Z. J., Zhao, X. L., Chai, Z. F., Shi, W. Q.: Electrochemical behaviors of Dy(III) and its co-reduction with Al(III) in molten LiCl-KCl salts. Electrochim. Acta 147, 87 (2014).10.1016/j.electacta.2014.09.095Search in Google Scholar

36. Liu, K., Tang, H. B., Pang, J. W., Liu, Y. L., Feng, Y. X., Chai, Z. F., Shi, W. Q.: Electrochemical properties of uranium on the liquid gallium electrode in LiCl-KCl eutectic. J. Electrochem. Soc. 163, D554 (2016).10.1149/2.1191609jesSearch in Google Scholar

37. Liu, Y. L., Liu, K., Yuan, L. Y., Chai, Z. F., Shi, W. Q.: Estimation of the composition of intermetallic compounds in LiCl-KCl molten salt by cyclic voltammetry. Faraday Discuss. 190, 387 (2016).10.1039/C5FD00220FSearch in Google Scholar PubMed

38. Liu, Y. L., Yan, Y. D., Han, W., Zhang, M. L., Yuan, L. Y., Lin, R. S., Ye, G. A., He, H., Chai, Z. F., Shi, W. Q.: Electrochemical separation of Th from ThO2 and Eu2O3 assisted by AlCl3 in molten LiCl–KCl. Electrochim. Acta 114, 180 (2013).10.1016/j.electacta.2013.09.154Search in Google Scholar

39. Liu, Y. L., Yuan, L. Y., Ye, G. A., Kui, L., Zhu, L., Zhang, M. L., Chai, Z. F., Shi, W. Q.: Co-reduction behaviors of lanthanum and aluminium ions in LiCl-KCl eutectic. Electrochim. Acta 147, 104 (2014).10.1016/j.electacta.2014.08.114Search in Google Scholar

40. Sedmidubsky, D., Konings, R. J. M., Soucek, P.: Ab-initio calculations and phase diagram assessments of An-Al systems (An=U, Np, Pu). J. Nucl. Mater. 397, 1 (2010).10.1016/j.jnucmat.2009.11.023Search in Google Scholar

41. Cassayre, L., Caravaca, C., Jardin, R., Malmbeck, R., Masset, P., Mendes, E., Serp, J., Soucek, P., Glatz, J. P.: On the formation of U-Al alloys in the molten LiCl-KCl eutectic. J. Nucl. Mater. 378, 79 (2008).10.1016/j.jnucmat.2008.05.004Search in Google Scholar

42. Soucek, P., Malmbeck, R., Mendes, E., Nourry, C., Sedmidubsky, D., Glatz, J. P.: Study of thermodynamic properties of Np-Al alloys in molten LiCl-KCl eutectic. J. Nucl. Mater. 394, 26 (2009).10.1016/j.jnucmat.2009.08.003Search in Google Scholar

43. Mendes, E., Malmbeck, R., Nourry, C., Soucek, P., Glatz, J. P.: On the electrochemical formation of Pu-Al alloys in molten LiCl-KCl. J. Nucl. Mater. 420, 424 (2012).10.1016/j.jnucmat.2011.09.017Search in Google Scholar

44. Soucek, P., Malmbeck, R., Nourry, C., Glatz, J. P.: Pyrochemical Reprocessing of spent fuel by electrochemical techniques using solid aluminium cathodes. In: B. Raj, P. R. V. Rao, K. V. G. Kutty, U. K. Mudali (Eds.), Asian Nuclear Prospects 2010, vol. 7. Energy Procedia (2011), p. 396.10.1016/j.egypro.2011.06.052Search in Google Scholar

45. Liu, K., Liu, Y. L., Yuan, L. Y., Wang, L., Wang, L., Li, Z. J., Chai, Z. F., Shi, W. Q.: Thermodynamic and electrochemical properties of holmium and HoxAly intermetallic compounds in the LiCl-KCl eutectic. Electrochim. Acta 174, 15 (2015).10.1016/j.electacta.2015.05.161Search in Google Scholar

46. Liu, K., Liu, Y. L., Yuan, L. Y., He, H., Yang, Z. Y., Zhao, X. L., Chai, Z. F., Shi, W. Q.: Electroextraction of samarium from Sm2O3 in chloride melts. Electrochim. Acta 129, 401 (2014).10.1016/j.electacta.2014.02.136Search in Google Scholar

47. Liu, K., Liu, Y. L., Yuan, L. Y., Zhao, X. L., Chai, Z. F., Shi, W. Q.: Electroextraction of gadolinium from Gd2O3 in LiCl-KCl-AlCl3 molten salts. Electrochim. Acta 109, 732 (2013).10.1016/j.electacta.2013.07.084Search in Google Scholar

48. Liu, K., Liu, Y. L., Yuan, L. Y., Zhao, X. L., He, H., Ye, G. A., Chai, Z. F., Shi, W. Q.: Electrochemical formation of erbium-aluminum alloys from erbia in the chloride melts. Electrochim. Acta 116, 434 (2014).10.1016/j.electacta.2013.11.093Search in Google Scholar

49. Liu, K., Yuan, L. Y., Liu, Y. L., Zhao, X. L., He, H., Ye, G. A., Chai, Z. F., Shi, W. Q.: Electrochemical reactions of the Th4+/Th couple on the tungsten, aluminum and bismuth electrodes in chloride molten salt. Electrochim. Acta 130, 650 (2014).10.1016/j.electacta.2014.03.085Search in Google Scholar

50. Liu, Y. L., Liu, K., Luo, L. X., Yuan, L. Y., Chai, Z. F., Shi, W. Q.: Direct separation of uranium from lanthanides (La, Nd, Ce, Sm) in oxide mixture in LiCl-KCl eutectic melt. Electrochim. Acta 275, 100 (2018).10.1016/j.electacta.2018.04.140Search in Google Scholar

51. Liu, Y.-L., Yan, Y. D., Han, W., Zhang, M. L., Yuan, L. Y., Liu, K., Ye, G. A., He, H., Chai, Z. F., Shi, W. Q.: Extraction of thorium from LiCl-KCl molten salts by forming Al-Th alloys: a new pyrochemical method for the reprocessing of thorium-based spent fuels. RSC Adv. 3, 23539 (2013).10.1039/c3ra43292kSearch in Google Scholar

52. Liu, Y. L., Ye, G. A., Yuan, L. Y., Liu, K., Feng, Y. X., Li, Z. J., Chai, Z. F., Shi, W. Q.: Electroseparation of thorium from ThO2 and La2O3 by forming Th-Al alloys in LiCl-KCl eutectic. Electrochim. Acta 158, 277 (2015).10.1016/j.electacta.2015.01.128Search in Google Scholar

53. Luo, L. X., Liu, Y. L., Liu, N., Liu, K., Yuan, L. Y., Chai, Z. F., Shi, W. Q.: Electroreduction-based Tb extraction from Tb4O7 on different substrates: understanding Al-Tb alloy formation mechanism in LiCl-KCl melt. RSC Adv. 5, 69134 (2015).10.1039/C5RA11708ASearch in Google Scholar

54. Wang, L., Liu, Y. L., Liu, K., Tang, S. L., Yuan, L. Y., Su, L. L., Chai, Z. F., Shi, W. Q.: Electrochemical extraction of cerium from CeO2 assisted by AlCl3 in molten LiCI-KCI. Electrochim. Acta 147, 385 (2014).10.1016/j.electacta.2014.08.113Search in Google Scholar

55. Li, B., Liu, K., Pang, J. W., Yuan, L. Y., Liu, Y. L., Lin, M. Z.: Electrochemical properties of gadolinium on liquid gallium electrode in LiCI-KCI eutectic. J. Rare Earth 36, 656 (2018).10.1016/j.jre.2017.11.014Search in Google Scholar

56. Liu, K., Liu, Y. L., Chai, Z. F., Shi, W. Q.: Evaluation of the electroextractions of Ce and Nd from LiCl-KCl molten salt using liquid Ga electrode. J. Electrochem. Soc. 164, D169 (2017).10.1149/2.0511704jesSearch in Google Scholar

57. Pang, J. W., Liu, K., Liu, Y. L., Nie, C. M., Luo, L. X., Yuan, L. Y., Chai, Z. F., Shi, W. Q.: Electrochemical properties of lanthanum on the liquid gallium electrode in LiCl-KCl Eutectic. J. Electrochem. Soc. 163, D750 (2016).10.1149/2.0611614jesSearch in Google Scholar

58. Novoselova, A., Smolenski, V., Volkovich, V. A., Ivanov, A. B., Osipenko, A., Griffiths, T. R.: Thermodynamic properties of La-Ga-Al and U-Ga-Al alloys and the separation factor of U/La couple in the molten salt-liquid metal system. J. Nucl. Mater. 466, 373 (2015).10.1016/j.jnucmat.2015.08.010Search in Google Scholar

59. Smolenski, V., Novoselova, A., Osipenko, A., Maershin, A.: Thermodynamics and separation factor of uranium from lanthanum in liquid eutectic gallium-indium alloy/molten salt system. Electrochim. Acta 145, 81 (2014).10.1016/j.electacta.2014.08.081Search in Google Scholar

60. Smolenski, V., Novoselova, A., Osipenko, A., Kormilitsyn, M., Luk’yanova, Y.: Thermodynamics of separation of uranium from neodymium between the gallium-indium liquid alloy and the LiCl-KCl molten salt phases. Electrochim. Acta 133, 354 (2014).10.1016/j.electacta.2014.04.042Search in Google Scholar

61. Soucek, P., Malmbeck, R., Mendes, E., Nourry, C., Glatz, J. P.: Exhaustive electrolysis for recovery of actinides from molten LiCl-KCl using solid aluminium cathodes. J. Radioanal. Nucl. Chem. 286, 823 (2010).10.1007/s10967-010-0739-6Search in Google Scholar

62. Myerson, A. Handbook of industrial crystallization. Butterworth-Heinemann, Oxford, UK (2001).Search in Google Scholar

63. Polinski, M. J., Grant, D. J., Wang, S., Alekseev, E. V., Cross, J. N., Villa, E. M., Depmeier, W., Gagliardi, L., Albrecht-Schmitt, T. E.: Differentiating between trivalent lanthanides and actinides. J. Am. Chem. Soc. 134, 10682 (2012).10.1021/ja303804rSearch in Google Scholar PubMed

64. Polinski, M. J., Wang, S., Alekseev, E. V., Depmeier, W., Liu, G., Haire, R. G., Albrecht-Schmitt, T. E.: Curium(III) borate shows coordination environments of both plutonium(III) and americium(III) borates. Angew. Chem. Int. Ed. 51, 1869 (2012).10.1002/anie.201107956Search in Google Scholar PubMed

65. Cary, S. K., Vasiliu, M., Baumbach, R. E., Stritzinger, J. T., Green, T. D., Diefenbach, K., Cross, J. N., Knappenberger, K. L., Liu, G., Silver, M. A., DePrince, A. E., Polinski, M. J., Van Cleve, S. M., House, J. H., Kikugawa, N., Gallagher, A., Arico, A. A., Dixon, D. A., Albrecht-Schmitt, T. E.: Emergence of californium as the second transitional element in the actinide series. Nat. Commun. 6, 6825 (2015).10.1038/ncomms7827Search in Google Scholar PubMed PubMed Central

66. Silver, M. A., Cary, S. K., Johnson, J. A., Baumbach, R. E., Arico, A. A., Luckey, M., Urban, M., Wang, J. C., Polinski, M. J., Chemey, A., Liu, G., Chen, K.-W., Van Cleve, S. M., Marsh, M. L., Eaton, T. M., van de Burgt, L. J., Gray, A. L., Hobart, D. E., Hanson, K., Maron, L., Gendron, F., Autschbach, J., Speldrich, M., Koegerler, P., Yang, P., Braley, J., Albrecht-Schmitt, T. E.: Characterization of berkelium(III) dipicolinate and borate compounds in solution and the solid state. Science 353, (2016).10.1126/science.aaf3762Search in Google Scholar PubMed

67. Polinski, M. J., Wang, S., Alekseev, E. V., Depmeier, W., Albrecht-Schmitt, T. E.: Bonding changes in plutonium(III) and americium(III) Borates. Angew. Chem. Int. Ed. 50, 8891 (2011).10.1002/anie.201103502Search in Google Scholar PubMed

68. Silver, M. A., Albrecht-Schmitt, T. E.: Evaluation of f-element borate chemistry. Coord. Chem. Rev. 323, 36 (2016).10.1016/j.ccr.2016.02.015Search in Google Scholar

69. Yin, X. M., Wang, Y. X., Bai, X. J., Wang, Y. M., Chen, L. H., Xiao, C. L., Diwu, J., Du, S. Y., Chai, Z. F., Albrecht-Schmitt, T. E., Wang, S. A.: Rare earth separations by selective borate crystallization. Nat. Commun. 8, 14438 (2017).10.1038/ncomms14438Search in Google Scholar PubMed PubMed Central

70. Krishnamurthy, N., Gupta, C. K. Extractive Metallurgy of Rare Earths. CRC Press, Boca Raton, FL, USA (2015).10.1201/b19055Search in Google Scholar

71. Wang, Y., Lu, H., Xing, D., Tao, D., Bai, X., Cai, Y., Yin, X., Chen, L., Juan, D., Du, S., Zhou, R., Chai, Z., Albrecht-Schmitt, T. E., Ning, L., Shuao, W.: Facile and efficient decontamination of thorium from rare earths based on selective selenite crystallization. Inorg. Chem. 57, 1880 (2018).10.1021/acs.inorgchem.7b02681Search in Google Scholar PubMed