Selective Extraction of Cs and Co from Liquid Radioactive Waste

Sorption on inorganic sorbents is often used for the selective extraction of {sup 137}Cs and {sup 60}Co from aqueous solutions. Most inorganic sorbents cannot be regenerated using existing technology. However, some highly-selective sorbents have a high cost; therefore it is preferable that these sorbents be regenerable. This paper demonstrates that selective sorbents (in particular, ferri-ferrocyanide nickel) can be regenerated electrochemically. It is shown that the degree of sorbent regeneration and the ion permselectivity of the process depends on the electric current density, the apparatus design and the scheme of the extraction process.