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- W2201904865 abstract "Studied was an application of supercritical fluid extraction (SFE) to cleaning of the materials contaminated with metal oxides. By using supercritical CO2 including chemical complexes of tri-n-buthylphosphate (TBP) and HNO3, lanthanide was recovered from oxide mixtures placed in a pressure vessel. The lanthanide oxide was dissolved with TBP-HNO3 and extracted with TBP in supercritical CO2. This cleaning method reduces volume amount of liquid waste arising from treatment of the contaminated materials. Being applied to a mixture of Gd2O3 and SrO, we found that Gd was selectively recovered and Sr was not found in the recovered solution. Gd was also selectively recoverd when a mixture of Gd2O3 and ZrO2 was treated. This selective nature of decontamination is an additional advantage of the SFE with TBP-HNO3 complex. This method would be applicable to the selective cleaning of materials contamined with radioactive oxides such as UO2/PuO2." @default.
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- W2201904865 date "2000-01-01" @default.
- W2201904865 modified "2023-10-17" @default.
- W2201904865 title "Cleaning of materials contaminated with metal oxides through supercritical fluid extraction with CO2 containing TBP" @default.
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- W2201904865 doi "https://doi.org/10.1016/s0149-1970(00)00081-0" @default.
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