Key words: supercritical and liquid carbon dioxide, organic ligands, radionuclides, actinides, actinide oxides, radionuclide extraction, spent nuclear fuel
The developments in supercritical fluid extraction (SFE) of radionuclides progressed since 1990's are reviewed. The possibility of extraction of radionuclides using supercritical and liquid carbon dioxide (SC- and L-CO2) containing different organic ligands from solutions, different matrixes as well as from mixtures of metal oxides was stated. Perspectives of SFE utilization for the reprocessing of spent nuclear fuel (SNF) are discussed. The latter is very promising as a possibility to diminish the production of highly radioactive aqueous and organic solutions, which are formed as by-products in existing technologies of SNF reprocessing.