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

Orano Mining

Orano Demantelement

Frédéric Cuer

Agnès Grandjean

Sylvain Faure

Cécile Marie

Axel De Nadaï

Manon Marbet

Romain Castellani

A mesoporous organic material which makes it possible to extract, using the liquid-solid extraction technique, the uranium(VI) contained in an aqueous medium including phosphoric acid, with high efficiency and high selectivity for the iron that the medium can likewise contain. The material is likely to be obtained by cross-linking polymerisation of a monomer of formula (I) below, wherein: R, Rand Rare, independently from one another, H, a Cto Csaturated or unsaturated, linear or branched hydrocarbon group, or a polymerisable group, with the condition that at least one of R, Rand Ris a polymerisable group; Rand Rare, independently from one another, H or a Cto Csaturated or unsaturated, linear or branched hydrocarbon group; the cross-linking polymerisation being carried out in the presence of a cross-linking agent and one or more pore-forming agents.

Mesoporous organic material, useful in particular for extracting uranium(VI) from aqueous media including phosphoric acid, and uses thereof

The invention relates to the use of an organic-inorganic hybrid material, comprising an inorganic solid support on which are grafted organic molecules having the general formula (I) below: in which: The invention also relates to a method that makes it possible to recover the uranium(VI) present in a sulfuric acid aqueous solution, selectively with respect to the other metal cations that may also be present in said solution.

Use of an organic-inorganic hybrid material for extracting uranium(VI) from a sulfuric acid aqueous solution, issued notably from the sulfuric leaching of a uranium-bearing ore

A biological decontamination gel, consisting of a colloidal solution comprising from 5 to 30% by mass, preferably 5 to 25% by mass, still preferably 8 to 20% by mass, based on the mass of the gel, of at least one inorganic viscosifying agent: 0.5 to 10 mol/L of gel, preferably 1 to 10 mol/L of gel, of at least one active biological decontamination agent; 0.05 to 5% by mass, preferably 0.05 to 2% by mass, based on the mass of the gel, of at least one super-absorbent polymer; 0.1 to 2% by mass, based on the mass of the gel, of at least one surfactant; and the remainder of solvent. A biological decontamination method applying this gel.

Biological decontamination gel and method for decontaminating surfaces by using this gel

The invention relates to a method for electrokinetic decontamination of a porous solid medium, which comprises: Applications: decontamination of materials with a cement matrix, notably within the scope of dismantlement of military or industrial installations, in particular nuclear installations, or the rehabilitation of installations likely to have been contaminated by ecotoxic or radiological chemical species; clearing pollution of geological soils, sediments and sludges.

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Cornillon, France

Frédéric Cuer