Uranyl peroxide ((UO2)(O2)·4H2O; UO4) precipitation for uranium sequestering: formation and physicochemical characterization

Maengkyo Oh, Keunyoung Lee, Kwang Wook Kim, Richard I. Foster, Chang Ha Lee

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)2495-2501
Number of pages7
JournalJournal of Radioanalytical and Nuclear Chemistry
Issue number6
Publication statusPublished - 2022 Jun

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea Grant (No. NRF-2017M2A8A5015147) funded by the Ministry of Science and ICT.

Publisher Copyright:
© 2022, Akadémiai Kiadó, Budapest, Hungary.

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Nuclear Energy and Engineering
  • Radiology Nuclear Medicine and imaging
  • Pollution
  • Spectroscopy
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis


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