Commissariat a L'energie Atomique Et Aux Energies Alternatives

Centre National De La Recherche Scientifique

Universitè De Montpellier

Université Montpellier 2 Sciences Et Techniques

Extracthive

Euralox

Frédéric Goettmann

Agnès Grandjean

Fabien Frances

Amélie Ludwig

Stéphane Pellet-Rostaing

Guilhem Arrachart

David Lambertin

Fabien Frizon

Alain Ledoux

Adrien Rooses

Daniel Meyer

Olivier Conocar

Raphaël Turgis

Sabah El Mourabit

Sandrine Mongin

Virginie Labe

Camille Carrignon

Romain Castellani

Bernhard Smutek

Arnaud Poulesquen

Charline Legoff

Valérie Tanchou

Audrey Hertz

Marie Guillot

Carole Delchet

Adrien Blachere

Vanessa Amaral De Oliveira

Quentin Ricoux

Johann Ravaux

Jérôme Lacquement

A decontamination gel is provided consisting of a colloidal solution comprising 0.1% to 30% by mass, preferably 0.1% to 25% by mass, still more preferably from 5% to 25% by mass, even more preferably 8% to 20% by mass, based on the mass of the gel, of at least one inorganic viscosifying agent; 0.1 to 10 mol/L of gel, preferably 0.5 to 10 mol/L of gel, still more preferably 1 to 10 mol/L of gel of at least one active decontamination agent; 0.01% to 10% by mass, preferably 0.1% to 5% by mass based on the mass of the gel of at least one mineral pigment; optionally, 0.1% to 2% by mass based on the mass of the gel, of at least one surfactant; optionally, 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; and the balance of solvent.

Pigmented decontaminating gel and method for decontaminating surfaces using said gel

The present invention relates to a method of selective extraction of a platinoid, from a ceramic support containing a metal, comprising the following successive steps: a) the support is brought into contact, with an extraction medium consisting of a pressurized dense fluid containing an organic ligand that is selective for the metal and that is capable of forming a complex with the metal in the 0 state; whereby a ceramic support depleted in the metal, or even free of the metal, and, a medium consisting of the fluid containing the complex of the organic ligand with the metal in the 0 state are obtained; b) the fluid is brought back to atmospheric pressure and to ambient temperature, whereby the complex separates from the fluid; c) the ceramic support depleted in the metal, or even free of the metal, and the complex, are recovered.

Method of selective extraction of platinoids, from a support containing same, with an extraction medium consisting of a supercritical fluid and an organic ligand

A biological decontamination gel is provided, consisting of a colloidal solution comprising 5% to 30% by mass, preferably 5% to 25% by mass, still more preferably 8% to 20% by mass based on the mass of the gel, of at least one inorganic viscosifying agent; an active biological decontamination agent consisting of the combination of a mineral base selected from hydroxides of alkaline metals, hydroxides of earth alkaline metals, and mixtures thereof, and of an oxidizing agent stable in a basic medium selected from permanganates, persulfates, ozone, hypochlorites, and mixtures thereof; the mineral base being present in an amount from 0.05 to 10 mol/L of gel, preferably in an amount from 0.1 to 5 mol/L of gel, and the oxidizing agent stable in a basic medium being present in an amount from 0.05 to 5 mol/L of gel, preferably from 0.1 to 2 mol/L of gel; optionally 0.1% to 2% by mass based on the mass of the gel, of at least one surfactant; and the balance of solvent; and the gel not containing any super-absorbent polymer.

Oxidizing alkaline biodecontamination gel and surface biodecontamination method using said gel

The invention relates to an organic-inorganic hybrid material which comprises an inorganic solid support on which are grafted organic molecules of the general formula (I) hereafter: and relates to methods allowing preparation of this hybrid material as well as to the uses of the hybrid material for extracting uranium(VI) from an aqueous medium comprising phosphoric acid.

Organic-inorganic hybrid material of use for extracting uranium (VI) from aqueous media containing phosphoric acid, processes for preparing same and uses thereof

A method for treating before calcination a nitric aqueous solution comprising at least one radionuclide and ruthenium is provided. The method comprises a step for adding to the solution a compound selected from lignins, lignocelluloses, optionally as salts and mixtures thereof.

Method for the pre-calcining treatment of an aqueous nitric solution comprising at least one radionuclide and optionally ruthenium

The invention relates to a process for recovering at least one platinoid element contained in an acidic aqueous solution comprising chemical elements other than the platinoid element, the process comprising the steps of (a) bringing the acidic aqueous solution into contact with a reducing amount of a reducing agent which is a non-sulphurous and non-glucidic alcoholic compound chosen from cyclic, optionally aromatic, alcohols and aliphatic polyols, which reduces the platinoid element to its 0 oxidation state; and (b) separating the reduced platinoid element from the acidic aqueous solution.

Process for separating at least one platinoid element from an acidic aqueous solution comprising, besides this platinoid element, one or more other chemical elements

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Les Angles, France

Frédéric Goettmann