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    • 23. 发明专利
    • METHOD FOR TREATING DECONTAMINATED WASTE LIQUID
    • JPH0926499A
    • 1997-01-28
    • JP17736595
    • 1995-07-13
    • MITSUBISHI HEAVY IND LTD
    • KAKIMOTO AKIRAONIZUKA HIRONORI
    • G21F9/12
    • PROBLEM TO BE SOLVED: To make it possible to decrease the necessary number of costly shielded drums by removing fully ions of radioactive elements from a decontaminated waste liquid. SOLUTION: The treatment device is constituted of a waste liquid tank 3, a waste liquid supplying pump 4, an Li-type positive ion exchange resin column 1 and two mixed-resin column 2 filled with a mixed resin made of an H-type positive ion exchange resin and an OH-type negative ion exchange resin. After a decontaminated waste liquid containing ions of radioactive elements is passed first through the resin column 1 to remove the ions of the radioactive elements together with other bivalent and trivalent positive ions from the waste liquid and then through the mixed-resin column 2 to remove organic acid by absorbing it, the cleaned liquid is sent to an existing waste liquid treatment device and is treated there. Consequently, the quantity of a treated waste liquid in a process for removing the ions of the radioactive elements increases sharply in comparison with a mixed resin, which makes it possible to reduce the necessary number of costly shielded containers filled with ion exchange resins.