Abstract: 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: R1, R2 and R3 are, independently from one another, H, a C1 to C12 saturated or unsaturated, linear or branched hydrocarbon group, or a polymerisable group, with the condition that at least one of R1, R2 and R3 is a polymerisable group; R4 and R5 are, independently from one another, H or a C1 to C8 saturated 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.

Abstract: 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: R1, R2 and R3 are, independently from one another, H, a C1 to C12 saturated or unsaturated, linear or branched hydrocarbon group, or a polymerisable group, with the condition that at least one of R1, R2 and R3 is a polymerisable group; R4 and R5 are, independently from one another, H or a C1 to C8 saturated 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.

Abstract: 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: x, y and z=0 or 1, with at least one of x, y and z different from 0; m=1 to 6; v and w=0 or 1, with v=1 when w=0, and v=0 when w=1; if x=0, R1?H or a saturated or unsaturated, linear or branched, C1 to C12 hydrocarbon group, whereas, if x=1, R1=a group bound to the inorganic solid support by at least one covalent bond; if y=0, R2?H or a saturated or unsaturated, linear or branched, C1 to C12 hydrocarbon group, whereas, if y=1, R2=a group bound to the inorganic solid support by at least one covalent bond; if z=0, R3?H or a saturated or unsaturated, linear or branched, C1 to C12 hydrocarbon group, whereas, if z=1, R3=a group bound to the inorganic solid support by at least one covalent bond; R4 and R5?H, a saturated or unsaturated, linear or branched, C2 to C8 hydrocarbon group, or a monocyclic aromatic group

Abstract: 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: x, y and z=0 or 1, with at least one of x, y and z different from 0; m=1 to 6; v and w=0 or 1, with v=1 when w=0, and v=0 when w=1; if x=0, R1?H or a saturated or unsaturated, linear or branched, C1 to C12 hydrocarbon group, whereas, if x=1, R1=a group bound to the inorganic solid support by at least one covalent bond; if y=0, R2?H or a saturated or unsaturated, linear or branched, C1 to C12 hydrocarbon group, whereas, if y=1, R2=a group bound to the inorganic solid support by at least one covalent bond; if z=0, R3?H or a saturated or unsaturated, linear or branched, C1 to C12 hydrocarbon group, whereas, if z=1, R3=a group bound to the inorganic solid support by at least one covalent bond; R4 and R5?H, a saturated or unsaturated, linear or branched, C2 to C8 hydrocarbon group, or a monocyclic aromatic group

Abstract: 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.

Abstract: The invention relates to a method for electrokinetic decontamination of a porous solid medium, which comprises: a) extracting the contaminating species present in the solid medium in an electrolyte appearing as an essentially inorganic gel, this extraction being obtained by applying an electric current between two electrodes positioned at the surface and/or in the interior of the solid medium, the contact of at least one of these electrodes with said solid medium being ensured by a layer of said gel, b) drying the gel containing the thereby extracted contaminating species until a dry residue is obtained which fractures, and c) removing the thereby obtained dry residue from said solid residue.

Abstract: 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.

Abstract: The invention relates to a method for electrokinetic decontamination of a porous solid medium, which comprises: a) extracting the contaminating species present in the solid medium in an electrolyte appearing as an essentially inorganic gel, this extraction being obtained by applying an electric current between two electrodes positioned at the surface and/or in the interior of the solid medium, the contact of at least one of these electrodes with said solid medium being ensured by a layer of said gel, b) drying the gel containing the thereby extracted contaminating species until a dry residue is obtained which fractures, and c) removing the thereby obtained dry residue from said solid residue.