B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
362/31
B01J 45/00 (2006.01) C01G 43/00 (2006.01) C02F 1/52 (2006.01) C02F 1/54 (2006.01) C02F 1/58 (2006.01) C02F 1/66 (2006.01) C02F 1/68 (2006.01) C02F 9/00 (2006.01) C22B 60/02 (2006.01) G21F 9/06 (2006.01)
Patent
CA 1298923
ABSTRACT OF THE DISCLOSURE A process for treating a waste water containing uranium and fluorine comprises a neutralizing precipitation step wherein slaked lime is added to the waste water containing uranium and fluorine and precipitate thus formed is separated and removed, and an adsorption step wherein supernatant from the neutralizing precipitation step is contacted with a chelating resin which can selectively adsorb fluorine ions and another chelating resin which can selectively adsorb uranyl ions to thereby adsorb and remove the fluorine and uranyl ions remaining in the supernatant. Eluates of the ions adsorbed by the chelating resins and waste liquors for washing and regeneration of these resins are returned to the neutralizing precipitation step. Prior to the neutralizing precipitation step, a decarbonation step may be provided for decomposing carbonate ions, if they are contained in the waste water to be treated.
529404
Echigo Yoshiaki
Ishikura Tadashi
Ogura Yoshikazu
Otomura Keiichiro
Yamao Mutsunori
Doryokuro Kakunenryo Kaihatsu Jigyodan
Japan Nuclear Cycle Development Institute
Marks & Clerk
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