A highly efficient extraction system for Am( iii )–Cm( iii ) pair separation in spent nuclear fuel reprocessing

A highly efficient extraction system for Am( iii )–Cm( iii ) pair separation in spent nuclear fuel reprocessing Научная публикация

Журнал

Inorganic Chemistry Frontiers
ISSN: 2052-1553 , E-ISSN: 2052-1545

Вых. Данные

Год: 2026, Том: 13, Страницы: 555-563 Страниц : 9 DOI: 10.1039/d5qi01560j

Авторы

Petrov V.G. ¹ , Matveev P.I. ¹ , Nenajdenko V.G. ¹ , Ustynyuk Yu.A. ¹ , Gloriozov I.P. ¹ , Evsiunina M.V. ¹ , Lemport P.S. ¹ , Avagyan N.A. ¹ , Petrov V.S. ¹ , Krot A.D. ¹ , Kalle P. ² , Khrustalev V.N. ^3,4 , Goletskiy N.D. ⁵ , Naumov A.A. ⁵ , Kalmykov S.N. ¹

Организации

1	Lomonosov Moscow State University, Department of Chemistry, Leninskie gory 1 bld. 3, 119991 Moscow, Russia
2	N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky pr. 31, 119991 Moscow, Russia
3	N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospekt 47, 119334 Moscow, Russia
4	Research Institute of Chemistry, Peoples’ Friendship University of Russia, Miklukho-Maklaya Street 6, 117198 Moscow, Russia
5	V.G. Khlopin Radium Institute, JSC, 2nd Murinsky Prospekt 28, 194021 Saint Petersburg, Russia

Информация о финансировании (1)

Институт органической химии им. Н. Д. Зелинского Российской академии наук

Closing the nuclear fuel cycle is a key objective in the development of Generation IV nuclear systems, enabling the recycling of actinides and reducing the long-term radiotoxicity of nuclear waste. Americium is a prime candidate for transmutation, but its effective use requires high-purity separation from chemically similar curium and lanthanides. In this work, we report the design, synthesis, and evaluation of a novel extractant, 4,7-dicyano-N,N′-diethyl-N,N′-diphenyl-1,10-phenanthroline-2,9-dicarboxamide (DAPhenCN), for selective separation of Am(III) from Cm(III). This extractant was selected for synthesis based on the DFT modeling results of the complexes of 4- and 7-disubstituted 1,10-phenanthroline-2,9-dicarboxamides with Am(III), Cm(III) and lanthanides(III). Solvent extraction experiments revealed Am/Cm separation factors (SFAm/Cm) of 5–6, with favorable distribution ratios for counter-current processing. Crucially, DAPhenCN demonstrated excellent resistance to hydrolysis and radiolysis under α-, γ-, and electron-beam irradiation. Counter-current tests using real raffinates from VVER-1000 spent nuclear fuel reprocessing confirmed the robustness and efficiency of the extraction system, achieving >99% americium recovery and >99.9% curium purity. Light lanthanides partially co-extracted with Am(III), while heavier ones had no significant impact. The developed process enables the production of curium-free americium suitable for transmutation fuel fabrication, advancing the implementation of closed nuclear fuel cycles.

Petrov V.G. , Matveev P.I. , Nenajdenko V.G. , Ustynyuk Y.A. , Gloriozov I.P. , Evsiunina M.V. , Lemport P.S. , Avagyan N.A. , Petrov V.S. , Krot A.D. , Kalle P. , Khrustalev V.N. , Goletskiy N.D. , Naumov A.A. , Kalmykov S.N.
A highly efficient extraction system for Am( iii )–Cm( iii ) pair separation in spent nuclear fuel reprocessing
Inorganic Chemistry Frontiers. 2026. V.13. P.555-563. DOI: 10.1039/d5qi01560j WOS Scopus OpenAlex

Web of science:	WOS:001609451000001
Scopus:	2-s2.0-105027728682
OpenAlex:	W4415403598

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