METHOD FOR DECONTAMINATION OF A LIQUID EFFLUENT INCLUDING ONE OR MORE RADIOACTIVE CHEMICAL ELEMENTS BY TREATMENT IN A FLUIDIZED BED

• Main Authors: MUHR HERVE, BARRE YVES, JAUBERT CERE CLAIRE, PLASARI EDOUARD, COHIN OLIVIER, PACARY VINCENT
• Format: Patent
• Language: English
• Published: 01.12.2011
• Subjects: CHEMISTRY; DECONTAMINATION ARRANGEMENTS THEREFOR; METALLURGY; 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; TRANSPORTING; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention relates to a method for decontamination of a liquid effluent including one or more radioactive chemical elements to be eliminated including the following steps: a step of bringing into contact in a stirred fluidised bed, in a first zone of a reactor, of the said liquid effluent with solid particles able, by coprecipitation and/or adsorption and/or ion exchange, to capture and retain the said radioactive chemical element or elements, as a result of which a suspension of solid particles is obtained containing the said radioactive chemical element or elements; a step of settling, of the said suspension, in a second zone of the same reactor, where this second zone is separate from the first abovementioned zone, as a result of which a solid phase is obtained including the solid particles containing the said radioactive chemical element or elements to be eliminated, and a liquid phase with a reduced or zero content of the said radioactive chemical element or elements to be eliminated; and a step of separation of the said solid phase and of the said liquid phase.