[1A09-12] Nuclide Adsorption and Separation 2

[1A12] Effect of solution mixing on continuous removal of radioactive strontium from fresh water by column co-crystallization with calcium carbonate

*Tsuneki Ichikawa^1,2, Kazuo Yamada² (1. Hokkaido Univ., 2. NIES)

Keywords:radiostrontium, co-crystallization, calcium carbonate, decontamination factor, static mixer

Rdiostrontium in fresh water was decontaminated by passing through a crystalline CaCO₃-packed column after mixing the water and a NaCO₃ aqueous solution with a static mixer. The decontamination took place by co-crystallization with CaCO₃ in the supersaturated solution of CaCO₃. The decontamination factor increased with increasing the degree of super saturation, which was maximized by the perfect mixing of the solutions. To use a static mixer therefore increased the decontamination factor as well as the stability of the factor.