2007, №3

сс. 57-66

Features of Metal Cation Extraction by Complexon Solutions in Supercritical and Liquid Carbon Dioxide

2007, №3

сс. 57-66

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A.Yu. Shadrin, A.A. Murzin, V.A. Babain

Key words: supercritical fluid, liquefied gas, carbon dioxide, extraction, radionuclides

The work is devoted to a comparison of extraction processes of metals macro- and microquantities by complexon solutions in supercritical (SC) and liquid CO2. It is demonstrated that in the most cases the regularities of liquid-liquid extraction also serve in extraction by liquid and SC-CO2. The differences between the extraction by "traditional" solvents and by carbon dioxide is mostly kinetic due to a much lower viscosity of the latter in both liquid and SC states. The specific features of metal SFE become significant only in the case of extraction of microquantities.