METHOD FOR REMOVING RADIOACTIVE CESIUM

• Main Authors: ITO AKIRA, NIKI TAKEFUMI, YOSHIDA KAZUO, MIURA YASUO, NAKANISHI TOSHIHARU
• Format: Patent
• Language: English
• Published: 24.04.2014
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; DECONTAMINATION ARRANGEMENTS THEREFOR; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLIDMATERIALS OR FLUIDS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROMSOLID MATERIALS OR FLUIDS; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PHYSICS; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT; SEPARATION; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS; SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATICTABLES OR JIGS; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATING RADIOACTIVELY CONTAMINATED MATERIAL

PROBLEM TO BE SOLVED: To provide a method for efficiently separating radioactive cesium from a solution containing radioactive cesium.SOLUTION: A method for removing radioactive cesium comprises: agitating a solution containing radioactive cesium with a magnetic adsorbent; removing the magnetic adsorbent with a magnetic separation device; and making the solution pass through a separation membrane. The separation membrane is preferably a MF (microfiltration) membrane. A material obtained by binding magnetic particles and zeolite with use of an aqueous resin emulsion or a water-resistant water soluble resin is preferably used as the magnetic adsorbent. A material obtained by binding magnetic particles and an insoluble ferrocyanide with use of the aqueous resin emulsion or the water-resistant water soluble resin is preferably used as the magnetic adsorbent.