Abstract
The possibility of using supercritical fluid extraction (SFE) of radionuclides for spent nuclear fuel reprocessing and for decontamination of various environmental objects is considered. Subcritical and supercritical media (CO2 and Freons) containing various organic ligands can be used for extractive recovery of actinides and other radionuclides from diverse matrices, including oxides of these elements. SFE is also suitable for recovery of actinides and their separation from fission products, and also for decontamination of various surfaces. In the process, the volume of secondary radioactive aqueous and toxic organic wastes, which are formed in large amounts in the existing processes and give rise to long-term environmental problems, is reduced to a minimum.
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