POROUS COATING COATED WITH NANOPARTICLE MULTILAYERS OF DIFFERENT CYANOMETALLATES OF TRANSITION METALS, METHOD OF PREPARATION AND APPLICATION FOR TREATING AN EFFLUENT SOLUTION

摘要

The present invention relates to a composite solid material comprising crystalline nanoparticles of metal complexes M1 n1+ [M2(CN)p]n2- adsorbed at the surface of a porous solid support in which M1 is selected from transition metals and post-transition metals and M2 is selected from transition metals and post-transition metals, with n1 = 2 or 3, n2 = 3 or 4 and p = 6 or 8 characterized in that it comprises a plurality of different nanoparticles of said different complexes Mn1+ [M2(CN)p]n2- in which M1 and/or M2 are different in the various nanoparticles. The present invention relates to a method for preparing the material according to the invention and to a process for treating an effluent solution containing a mineral pollutant cation using a material according to the invention.