Centre National De La Recherche Scientifique

Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Université De Bourgogne

Commissariat a L'energie Atomique

Universite Dé Lorraine

Centre National De La Recherche Scientifique-cnrs

Ecole Pratique Des Hautes Etudes

Hervé Muhr

Yves Barre

Vincent Pacary

Eric Favre

Edouard Plasari

Frédéric Bernard

Olivier Cohin

Claire Jaubert Cere

Daniel Aymes

Moustapha Ariane

Frédéric Demoisson

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.

Method for decontamination of a liquid effluent including one or more radioactive chemical elements by treatment in a fluidized bed

The present invention relates to a method for continuously preparing mineral particles by means of the thermolysis of mineral precursors in an aqueous medium, comprising contacting: a reactive flow, including mineral precursors at a temperature lower than the conversion temperature thereof; and a heat transfer flow that is countercurrent to said reactive flow and contains water at a temperature that is sufficient to bring the precursors to a temperature higher than the conversion temperature thereof, the mixture flow that results from said reactive flow and said heat transfer flow then being conveyed into a tubular reactor, inside of which particles are formed by gradually converting the precursors, and where the reactive flow and the heat transfer flow are placed in contact with each other inside a mixing chamber, inside of which the reactive flow and the heat transfer flow are fed by supply pipes having outlet cross-sections that are smaller than the maximum cross-section of said mixing chamber. The invention also relates to a device for implementing said method.

Particle synthesis by means of the thermohydrolysis of mineral precursors

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Champigneulles, France

Hervé Muhr