Going deeper into plutonium sorption affected by redoxстатья
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Дата последнего поиска статьи во внешних источниках: 24 июля 2024 г.
Аннотация:Sorption of Pu(VI) onto synthesized goethite under oxidizing and normal conditions was investigated, whichrevealed its pH dependence on different solid/liquid ratios. Pu speciation upon sorption on the solid phase wascharacterized via extended X-ray absorption fine structure (EXAFS) spectroscopy, while that in solution wasassessed using ultraviolet–visible (UV–Vis) spectroscopy and liquid–liquid extraction. The obtained resultsdemonstrate differences in plutonium behavior in the studied systems. Pu(VI) remains hexavalent on the goethitesurface and in solution under oxidizing conditions. While Pu(IV) is stabilized on the mineral and Pu(V) is foundin solution under normal conditions. This study provides the thermodynamic descriptions of these reactions.