Treatment of radioactive spent extraction solvent by supercritical water oxidation
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Radioactive spent extraction solvent was treated by supercritical water oxidation. In this work, influences of reaction conditions on total organic carbon (TOC) removal, the volume percentage of CO2 yielded, and the distributions of radionuclides in gas, liquid and solid phase have been investigated. The results show that the TOC removal and the volume percentage of CO2 would be increased up to above 99% under optimal conditions. More than 88% of thorium and 67% of uranium were precipitated in solid phase, the rest remained in the liquid effluent, and no thorium and uranium were detected in gas phase.
KeywordsSupercritical water oxidation Distribution Spent extraction solvent Radionuclide
This work was supported by National Natural Science Foundation of China (No. 21507143) and “Strategic Priority Research Program” of the Chinese Academy of Sciences (XDA02050000).
- 2.Predisposal Management of Organic Radioactive Waste (2004) Technical reports series no. 427. International atomic energy agency, ViennaGoogle Scholar
- 3.Codée HD, Berntsen MTB, Hengst J, Lagerwerf H (2000) Incineration of radioactive organic liquids; five years of experience in The Netherlands. In: International Conference on Incineration, PortlandGoogle Scholar
- 6.Fulian XUE (2007) Analysis of corrosion reason of incinerator body. Surf Technol 36(3):78–79Google Scholar
- 16.Wang S, Qin Q, Chen K, Xia X-B, Ma H-J, Qiao Y-B, He L-B (2015) Supercritical water oxidation of spent extraction solvent simulants. Nucl Sci Tech 26(3):113–119Google Scholar
- 24.Xu D, Wang S, Zhang F, Huang C, Tang X, Guo Y (2014) Current research status of salt deposition in supercritical water oxidation. Chem Ind Eng Prog 33(4):1015–1021,1029Google Scholar