摘要:
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.
摘要:
The invention relates to a continuous process for decontaminating a radioactive liquid effluent comprising one or more radioactive chemical elements to be removed that comprises the following steps: a step of bringing said radioactive liquid effluent into contact, in a first reactor, with solid particles capable of capturing and retaining said radioactive chemical element(s) to be removed, by means of which a suspension of solid particles containing said radioactive chemical element(s) to be removed is obtained; a step of settling said suspension, in a second reactor, by means of which a solid phase is obtained that comprises the solid particles containing said radioactive chemical element(s) to be removed and a liquid phase depleted or devoid of said radioactive chemical element(s) to be removed; a step of separating said solid phase and said liquid phase; characterized in that a portion of said solid phase obtained at the end of the settling step is reinjected into the first reactor for the implementation of a contacting step as defined above. Application to the treatment of radioactive liquid effluents originating from nuclear installations.
摘要:
A method for decontamination of a liquid effluent including one or more radioactive chemical elements to be eliminated is disclosed. According to one aspect, the method includes The method includes mixing, in a first zone of a reactor, solid particles with the liquid which are able, by co-precipitation, adsorption and/or ion exchange, to capture and retain the radioactive chemical elements. The solid particles settle in a second zone of the reactor. The solids, including the radioactive chemical elements, are then separated from the remaining liquid.
摘要:
The invention relates to a continuous process for decontaminating a radioactive liquid effluent comprising one or more radioactive chemical elements to be removed that comprises the following steps:a step of bringing said radioactive liquid effluent into contact, in a first reactor, with solid particles capable of capturing and retaining said radioactive chemical element(s) to be removed, by means of which a suspension of solid particles containing said radioactive chemical element(s) to be removed is obtained;a step of settling said suspension, in a second reactor, by means of which a solid phase is obtained that comprises the solid particles containing said radioactive chemical element(s) to be removed and a liquid phase depleted or devoid of said radioactive chemical element(s) to be removed;a step of separating said solid phase and said liquid phase;characterized in that a portion of said solid phase obtained at the end of the settling step is reinjected into the first reactor for the implementation of a contacting step as defined above.Application to the treatment of radioactive liquid effluents originating from nuclear installations.