Journal of Radioanalytical and Nuclear Chemistry

, Volume 314, Issue 2, pp 1169–1176 | Cite as

Treatment of radioactive spent extraction solvent by supercritical water oxidation

  • Qiang Qin
  • Shuai Wang
  • Hongyu Wang
  • Hongjun Ma
  • Kun Chen
  • Yanbo Qiao
  • Liubin He
  • Zhenghua Qian
  • Xueyang Liu
  • Zheng Li
  • Xiaobin Xia


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.


Supercritical 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).


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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2017

Authors and Affiliations

  1. 1.Center for Thorium Molten Salt Reactor System, Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghaiChina

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