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- Title
Uranyl peroxide ((UO<sub>2</sub>)(O<sub>2</sub>)·4H<sub>2</sub>O; UO<sub>4</sub>) precipitation for uranium sequestering: formation and physicochemical characterization.
- Authors
Oh, Maengkyo; Lee, Keunyoung; Kim, Kwang-Wook; Foster, Richard I.; Lee, Chang-Ha
- Abstract
Applicability of uranium peroxide ((UO2)(O2)·4H2O; UO4) precipitation to remove uranium from secondary wastewaters, generated as part of a spent uranium catalyst treatment process, has been studied. Precipitation characteristics of UO4 were evaluated as a function of pH, stirring status, time, and initial uranium concentrations. Optimized conditions were applied to the real uranium wastewater achieving ≥ 99% removal efficiency within 24 h. Dissolved impurities (Si, Sb, Fe) were co-precipitated with UO4 leading to increased particle sizes and faster precipitation kinetics. Uranium was separated effectively from the wastewater to below the 1 mg L−1 criteria necessary for secondary wastewater discharge.
- Subjects
URANIUM; PRECIPITATION (Chemistry) kinetics; HYDROGEN peroxide; PEROXIDES; INDUSTRIAL wastes; AMMOXIDATION; PRECIPITATION (Chemistry)
- Publication
Journal of Radioanalytical & Nuclear Chemistry, 2022, Vol 331, Issue 6, p2495
- ISSN
0236-5731
- Publication type
Article
- DOI
10.1007/s10967-022-08299-w