Studies on processes for recovering uranium from sediment wastes
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Sediment wastes generated from nuclear facilities often contain uranium and iron. From the viewpoint of reduction of environmental impact, separation of uranium from sediment wastes has been required. Wet processes based on precipitation of uranyl oxalate in inorganic acids have been investigated as methods for recovering uranium from sediment wastes containing iron and aluminum. It was found that 98.6% of uranium in H2SO4 dissolving such wastes can be selectively recovered by using oxalic acid with N-cyclohexyl-2-pyrrolidone (NCP).
KeywordsUranium Waste treatment Oxalic acid Precipitation N-cyclohexyl-2-pyrrolidone
The authors are grateful to members of the Waste Management Engineering Section, Environmental Research and Development Department, Ningyo-toge Environmental Engineering Center, Sector of Nuclear Fuel, Decommissioning and Waste Management Technology Development, Japan Atomic Energy Agency.
- 1.IAEA Safety Standards (2017) Safety of nuclear fuel cycle facilities, specific safety requirements no. SSR-4Google Scholar
- 3.Recycling and Reuse of Materials Arising from the Decommissioning of Nuclear Facilities (2017). OECD NEAGoogle Scholar
- 6.Yan TY (1990) Uranium precipitation from eluate using hydrogen peroxide. Miner Metall Process 7:222–224Google Scholar
- 7.Djogic R, Cuculie V, Branica M (2005) Precipitation of uranium(VI) peroxide (UO4) in sodium perchlorate solution. Croat Chem Acta 78(4):575–580Google Scholar
- 9.Krzysztof B (2009) Fenton reaction controversy concerning the chemistry. Ecol Chem Eng S 16(3):347–358Google Scholar
- 10.Ohashi Y, Tanaka Y, Tsunashima Y, Ikeda Y (2017) Development of methods for recovering uranium from sludge-like uranium generated in decontamination of metal wastes. J Nucl Sci Technol 54:382–390Google Scholar
- 15.Semon L, Boehme C, Billard I, Hennig C, Lutzenkirchen K, Reich T, Rossberg A, Rossini I, Wipff G (2001) Do perchlorate and triflate anions bind to the uranyl cation in an acidic aqueous medium? a combined EXAFS and quantum mechanical investigation. ChemPhysChem 2(10):591–598CrossRefPubMedGoogle Scholar
- 21.Lin S-H, Fujimura Y, Villaeys AA (2010) Advances in Multi-Photon Processes and Spectroscopy. Vol 19Google Scholar