| abstract |
Provided is a tritium substitution method having a process (101) of adding an organic substance including at least one of an organic acid, an organic acid alkali salt, a water-soluble amino acid, an organic acid to which a water-soluble amino acid alkali salt is added, an organic acid alkali salt, a water-soluble amino acid, and a water-soluble amino acid alkali salt, to radioactive substance-contaminated water containing tritium, a tritium substitution process (103) of circulating (102) fine bubbles in the contaminated water in which the organic substance has been added to cause a reaction of substituting hydrogen in the ± position of a carboxylic acid group by tritium through an interface of the fine bubbles to produce a tritium-substituted product. |