Abstract: Solid nanocomposite material comprising nanoparticles of a hexacyanometallate or octacyanometallate of an alkali metal and of a transition metal, of formula [Alk+x]Mn+[M?(CN)m]z? in which Alk is an alkali metal, x is 1 or 2, M is a transition metal, n is 2 or 3, M? is a transition metal, m is 6 or 8, z is 3 or 4, attached to at least one surface of a porous inorganic solid support, in which the nanoparticles are attached by adsorption to the at least one surface of the solid support, and in which the surface is a basic surface. Method for preparing this material. Method for extracting at least one metal cation from a liquid medium containing it, wherein the liquid medium is brought into contact with the material.

Abstract: A material in the form of an alveolar monolith consisting of a matrix of an inorganic oxide with a hierarchical and opened porosity comprising macropores, mesopores and micropores, said macropores, mesopores and micropores being interconnected, and nanoparticles of at least one metal cation exchange inorganic solid material being distributed in said porosity. A method for preparing this material and a method for separating a metal cation notably a cation of a radioactive isotope of a metal such as cesium using this material.

Abstract: Solid nanocomposite material comprising nanoparticles of a hexacyanometallate or octacyanometallate of an alkali metal and of a transition metal, of formula [Alk+x]Mn+[M?(CN)m]z? in which Alk is an alkali metal, x is 1 or 2, M is a transition metal, n is 2 or 3, M? is a transition metal, m is 6 or 8, z is 3 or 4, attached to at least one surface of a porous inorganic solid support, in which the nanoparticles are attached by adsorption to the at least one surface of the solid support, and in which the surface is a basic surface. Method for preparing this material. Method for extracting at least one metal cation from a liquid medium containing it, wherein the liquid medium is brought into contact with the material.

Abstract: The invention relates to a method for producing a solid nanocomposite material comprising nanoparticles of a metal coordination polymer with ligands CN, said nanoparticles satisfying the formula [Alk+x]Mn+[M?(CN)m]z? where Alk is an alkali metal, x is 1 or 2, M is a transition metal, n is 2 or 3, M? is a transition metal, m is 6 or 8, and z is 3 or 4; said Mn+ cations of the coordination polymer being bound by an organometallic bond or a coordination bond to an organic group R2 of an organic graft, and said organic graft furthermore being chemically attached, preferably by a covalent bond, to at least one surface of a solid support, by reaction of a group R1 of said graft with said surface.

Abstract: A supported membrane is provided comprising an inorganic, solid porous filtration membrane supported by an inorganic, solid porous support, said supported membrane comprising nanoparticles of a metal coordination polymer with CN ligands comprising Mn+ cations, where M is a transition metal and n is 2 or 3; and Alk+y[M?(CN)m]x? anions where Alk is an alkaline metal, y is 0, 1 or 2, M? is a transition metal, x is 3 or 4, and m is 6 or 8; said Mn+ cations of the coordination polymer being bound through an organometallic or coordination bond to an organic group of an organic graft chemically attached to the surface of the filtration membrane, inside the pores of the filtration membrane, and optionally inside the pores of the support. The supported membrane may be used in a process for separating at least one metal cation and solid particles from a liquid medium containing the same.

Abstract: The invention related to a complexing system for extracting a radionuclide from a waste water solution including calix[n]arene groups on the surface of a porous conducting material.

Abstract: A nanocomposite solid material includes nanoparticles of a metal coordination polymer with CN ligands comprising Mn+ cations, in which M is a transition metal and n is 2 or 3; and anions [M?(CN)m]x? in which M? is a transition metal, x is 3 or 4, and m is 6 or 8. The Mn+ cations of the coordination polymer are bound through an organometallic bond to an organic group of an organic graft chemically attached inside the pores of a support made of porous glass. The material can be used in a method for fixing (binding) a mineral pollutant, such as radioactive cesium, contained in a solution by bringing the solution in contact with the nanocomposite solid material.

Abstract: The invention relates to a method for producing a solid nanocomposite material comprising nanoparticles of a metal coordination polymer with ligands CN, said nanoparticles satisfying the formula [Alk+x]Mn+[M?(CN)m]z? where Alk is an alkali metal, x is 1 or 2, M is a transition metal, n is 2 or 3, M? is a transition metal, m is 6 or 8, and z is 3 or 4; said Mn+ cations of the coordination polymer being bound by an organometallic bond or a coordination bond to an organic group R2 of an organic graft, and said organic graft furthermore being chemically attached, preferably by a covalent bond, to at least one surface of a solid support, by reaction of a group R1 of said graft with said surface.

Abstract: A material in the form of an alveolar monolith consisting of a matrix of an inorganic oxide with a hierarchical and opened porosity comprising macropores, mesopores and micropores, said macropores, mesopores and micropores being interconnected, and nanoparticles of at least one metal cation exchange inorganic solid material being distributed in said porosity. A method for preparing this material and a method for separating a metal cation notably a cation of a radioactive isotope of a metal such as cesium using this material.

Abstract: The invention related to a complexing system for extracting a radionuclide from a waste water solution including calix[n]arene groups on the surface of a porous conducting material.

Abstract: 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.

Abstract: A supported membrane is provided comprising an inorganic, solid porous filtration membrane supported by an inorganic, solid porous support, said supported membrane comprising nanoparticles of a metal coordination polymer with CN ligands comprising Mn+ cations, where M is a transition metal and n is 2 or 3; and Alk+y[M?(CN)m]x? anions where Alk is an alkaline metal, y is 0, 1 or 2, M? is a transition metal, x is 3 or 4, and m is 6 or 8; said Mn+ cations of the coordination polymer being bound through an organometallic or coordination bond to an organic group of an organic graft chemically attached to the surface of the filtration membrane, inside the pores of the filtration membrane, and optionally inside the pores of the support. The supported membrane may be used in a process for separating at least one metal cation and solid particles from a liquid medium containing the same.

Abstract: 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 implementatio

Abstract: A nanocomposite solid material includes nanoparticles of a metal coordination polymer with CN ligands comprising Mn+ cations, in which M is a transition metal and n is 2 or 3; and anions [M?(CN)m]x? in which M? is a transition metal, x is 3 or 4, and m is 6 or 8. The Mnn+ cations of the coordination polymer are bound through an organometallic bond to an organic group of an organic graft chemically attached inside the pores of a support made of porous glass. The material can be used in a method for fixing (binding) a mineral pollutant, such as radioactive cesium, contained in a solution by bringing the solution in contact with the nanocomposite solid material.

Abstract: 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

Abstract: 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 o

Abstract: The invention relates to ureido or carbamate derivatives of crown ethers and of silicon of formula: These derivatives can be grafted to silica gel for the purpose of obtaining supports for the chromatographic separation of cations or of molecules comprising amine functional groups, such as amino acids.

Abstract: The invention relates to ureido or carbamate derivatives of crown ethers and of silicon of formula: These derivatives can be grafted to silica gel for the purpose of obtaining supports for the chromatographic separation of cations or of molecules comprising amine functional groups, such as amino acids.