| 摘要 |
PURPOSE:To efficiently and economically treat the radioactive waste water contg. an actinide element by packing an immobilization tannin-based adsorbent in a fixed-bed column, and specifying the amt. of radioactive waste water to be passed through the bed per unit volume of the adsorbent per hour. CONSTITUTION:In the treatment of the radioactive waste water contg. an actinide element, the immobilization tannin-based adsorbent consisting of inexpensive immobilization persimmon tannin is packed in the fixed-bed column, and the amt. of the radioactive waste water to be passed through the bed per unit volume of the adsorbent per hour (SV value) is controlled to 30-300hr<-1>. The actinide element adsorbed on the immobilization tannin-based adsorbent is dissolved in 0.01-0.5 N nitric acid or sulfuric acid and desorbed, and the immobilization tannin-based adsorbent is repeatedly used. The actinide element can be sufficiently removed at 6.2-10.5pH by this method. As a result, the radioactive waste water contg. an actinide element can be efficiently and economically treated at high capacity by the device.
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