In this study, selective fluorine adsorption behavior of zirconium silicate in the presence of coexisting anions was evaluated using a high concentration of iodine-containing liquid waste with a small amount of fluorine for the purpose of recycling iodine. Fluoride solutions with iodine, bromine, chlorine, and sulfate ions as coexisting anions were prepared, and the fluorine adsorption behavior was evaluated in terms of adsorption amount and selectivity coefficient. The results showed that fluorine was selectively adsorbed even in solutions containing 1000 times more coexisting anions than fluorine, and that the concentration of residual fluorine could be reduced below 8 mg/L, the target value for fluorine removal, by adding 30 g/L of ZrSiO4 to the simulated effluent. This indicates that selective fluorine removal from iodine-containing liquid waste with ZrSiO4 is feasible.
Kono et al. (Fri,) studied this question.