Uranyl peroxide precipitation for uranium sequestering: formation and physicochemical characterization

Applicability of uranium peroxide ((UO.sub.2)(O.sub.2)·4H.sub.2O; UO.sub.4) precipitation to remove uranium from secondary wastewaters, generated as part of a spent uranium catalyst treatment process, has been studied. Precipitation characteristics of UO.sub.4 were evaluated as a function of pH, sti...

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Bibliographic Details
Published inJournal of radioanalytical and nuclear chemistry Vol. 331; no. 6; p. 2495
Main Authors Oh, Maengkyo, Lee, Keunyoung, Kim, Kwang-Wook, Foster, Richard I, Lee, Chang-Ha
Format Journal Article
LanguageEnglish
Published Springer 01.06.2022
Subjects
Peroxides
Purification
Sewage
Uranium
Wastewater
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Summary:Applicability of uranium peroxide ((UO.sub.2)(O.sub.2)·4H.sub.2O; UO.sub.4) precipitation to remove uranium from secondary wastewaters, generated as part of a spent uranium catalyst treatment process, has been studied. Precipitation characteristics of UO.sub.4 were evaluated as a function of pH, stirring status, time, and initial uranium concentrations. Optimized conditions were applied to the real uranium wastewater achieving [greater than or equal to] 99% removal efficiency within 24 h. Dissolved impurities (Si, Sb, Fe) were co-precipitated with UO.sub.4 leading to increased particle sizes and faster precipitation kinetics. Uranium was separated effectively from the wastewater to below the 1 mg L.sup.-1 criteria necessary for secondary wastewater discharge.
ISSN:0236-5731
DOI:10.1007/s10967-022-08299-w