PURPOSE: To efficiently collect U by using a magnetic adsorbent and combining a slury adsorbing method and a magnetic separation method to perform solid-liq. separation and adsorption with one magnetic separator.
CONSTITUTION: Seawater drawn with pump 1 is stored in discharged seawater tank 3 after removing suspended matter with sand filter 2. This seawater is brought into contact with a magnetic adsorbent in slurry adsorbing tank 5 to allow U to be adsorbed with stirring, and the resulting slury is fed to high gradient separator 7 with pump 6 and separated into the adsorbent and seawater. The seawater is stored in discharged seawater tank 4. A washing liq. in tank 10 is supplied to separator 7 to wash the adsorbent, and then a desorbing liq. in tank 11 is supplied to separator 7 to allow the U in the adsorbent to be desorbed. The washing liq. is further supplied to separator 7 with pump 9 to wash the adsorbent, and the early-stage washing liq. is stored in tank 12. Magnetic valves 14, 17, 19 are opened to fed seawater in tank 3 to separator 7, and the seawater is fed to tank 5 together with the adsorbent.
YAMASHITA HISAO
NAKASHIMA FUMITO
OZAWA YOSHIHIRO
