COLLECTOR FOR HEXAVALENT URANIUM ION

PURPOSE:A U collector to be constituted easily, having high treating effect, requiring no neutralization process, obtained by arranging a reacting tank provided with a light source capable of emitting near-ultraviolet light or visible light and a precipitate separator set at the later side than this reacting tank. CONSTITUTION:The U-containing water liquid 11, ethanol 12, formic acid 13, and sulfuric acid 14 are fed to the mixing tank 10, N2 17 is jetted, the dissolved O2 is purged, and the mixed solution to be treated is sent to the reacting tank 20. In the reacting tank 20, insoluble UOSO4 precipitate is formed according to the reaction equation, and the precipitate is separated by the filter 30. The U concentration of the filtrate is detected by the detector 40. When the concentration is = the target value, the valves 15 and 42 are closed, the second valve 44 is opened, the water liquid from the device 30 is returned through the liquid channel 46 to the tank 20 and re-treated. This circulation treatment is detected by the detector 40 and it is continuously carried out until the concentration of U becomes