Recovery of Telluric Acid from Iodine-131 Production Liquid Waste by Modified Alcohol Precipitating Method

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Telluric acid can be recovered from iodine-131 production liquid waste. The waste was alkalized with ammonia water and precipitated with alcohol. The crude ammonium tellurate precipitate can be turned to telluric acid by recrystallizing from nitric acid. Spectrophotometric and chemical analysis of telluric acid showed that the purity of recovered telluric acid was satisfactory. The recovered telluric acid was reused, and showed the yield of iodine-131 from recovered telluric acid was the same as from original Cica C.P. grade telluric acid.