MATERIAU SOLIDE COMPOSITE FIXANT DES POLLUANTS MINERAUX, SON PROCEDE DE PREPARATION ET PROCEDE DE FIXATION DE POLLUANTS MINERAUX LE METTANT EN OEUVRE

摘要

The invention relates to a composite solid material which fixes inorganic contaminants based on metal hexacyanoferrate comprising a solid support coated with a thin film of an anion-exchange polymer to which is fixed an insoluble metal hexacyanoferrate forming a thin layer, characterized in that said polymer is a noncrosslinked polymer which comprises, as anion-exchange groups, solely quaternary ammonium groups and in that it does not comprise primary, secondary or tertiary amine groups. The present invention also relates to the process for the preparation of said composite solid material which fixes inorganic contaminants based on hexacyanoferrates. Finally, the present invention relates to a process, which can be carried out on a column and continuously, for fixing at least one inorganic contaminant present in a solution to said composite solid material which fixes inorganic contaminants. Said solution is in particular a liquid or an effluent resulting from the nuclear industry and from nuclear plants.