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<p>The extraction of cesium using crown ethers and polyethylene glycol (PEG) in perfluoro-2-methyl-3-pentanone perfluoroketone (PFK, FK-5-1-12, Novec 1230) has been investigated for the first time. PFK is a non-flammable, low-boiling liquid with zero potential for ozone depletion. The solubility of various substances in the PFK medium was established. It has been established that fluorinated compounds, for example, PFOA or BK-2, have the best solubility in the PFK medium. The effect of water concentration on the extraction of <sup>137</sup>Cs in a system with PFK and perfluorooctanoic acid (PFOA) was studied. The solubility of most ligands in PFk is lower than in freon 134 A. The use of fluorinated co-solvents for the extraction of radionuclides using crown esters that do not dissolve in PFCs is proposed. Up to 96% of cesium can be extracted using a solvent. Using PEG as ligands, it is possible to extract up to 94% of cesium in a PFC medium. The extraction ability of the proposed synergistic mixtures in PFK medium and in HFC-134a liquefied freon medium has been compared.</p>

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Extraction of 137Cs from the surface of solid materials in a perfluoro-(2-methyl-3-pentanone) medium

  • 期刊论文

  • 发表日期：

    2026年3月27日

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  • Alexey M. Fedotov,
  • Artem Y. Nikolaev,
  • Nadezhda E. Mishina,
  • Andrey A. Murzin,
  • Vasiliy A. Babain

摘要

The extraction of cesium using crown ethers and polyethylene glycol (PEG) in perfluoro-2-methyl-3-pentanone perfluoroketone (PFK, FK-5-1-12, Novec 1230) has been investigated for the first time. PFK is a non-flammable, low-boiling liquid with zero potential for ozone depletion. The solubility of various substances in the PFK medium was established. It has been established that fluorinated compounds, for example, PFOA or BK-2, have the best solubility in the PFK medium. The effect of water concentration on the extraction of 137Cs in a system with PFK and perfluorooctanoic acid (PFOA) was studied. The solubility of most ligands in PFk is lower than in freon 134 A. The use of fluorinated co-solvents for the extraction of radionuclides using crown esters that do not dissolve in PFCs is proposed. Up to 96% of cesium can be extracted using a solvent. Using PEG as ligands, it is possible to extract up to 94% of cesium in a PFC medium. The extraction ability of the proposed synergistic mixtures in PFK medium and in HFC-134a liquefied freon medium has been compared.