Abstract
The previous study reported that BiPbO2(NO3) is one of the most promising candidate materials for removing and immobilizing radioactive iodide. In that case, the solution contained only dissolved NaI and did not contain competing anions. This paper reports the reactivity of BiPbO2(NO3) with iodide ions in simulated radioactive liquid waste. This liquid contains many components, especially highly concentrated NaNO2, Na2CO3 and NaNO3. The obtained results show that BiPbO2(NO3) is useful for removing iodide ion from the simulated radioactive liquid waste but that there is a problem which should be resolved in the future. The problem is that a competing anion, HCO3−, interferes with the exchange reaction, and only the surfaces of the BiPbO2(NO3) crystals are used for the reaction.
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