A highly efficient in situ redox stabilization strategy for Am-Cm separation using AgBiO3.
Dalton Trans
; 53(32): 13583-13590, 2024 Aug 13.
Article
em En
| MEDLINE
| ID: mdl-39078269
ABSTRACT
AgBiO3 is reported for the exclusive oxidation of Am3+ â AmO2+ at near-neutral pH conditions. Literature methods of AmO2+ generation are generally two-step processes; i.e., Am3+ â AmO22+ oxidation followed by AmO22+ â AmO2+ reduction. These methods for Am3+ â AmO2+ oxidation use high temperatures (80-100 °C) and/or several reagents, causing the in situ presence of the AmO2+-complex rather than the AmO2+aq ions. This not only interferes with the much-needed Am-Cm selectivity but also limits the use of AmO2+aq in any other experimental study. The single-step Am3+ â AmO2+ oxidation in the present work using AgBiO3 is done at 25 °C in a non-complexing medium at pH â¼4, making it a first-of-its-kind report. Am-Eu and Am-Cm separation in a single contact, with a separation factor >104, was achieved using the present method, which is unprecedented among aqueous feed solutions. The AmO2+ generated using the present method under non-complexing pH conditions makes it also suitable for exploring the fundamental chemistry of the higher valent americyl ion. A complexation study using the thus-generated AmO2+ ion with acetate ion supports the concept.
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Bases de dados:
MEDLINE
Idioma:
En
Revista:
Dalton Trans
Assunto da revista:
QUIMICA
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Índia