Method for treating surfaces or gaseous media using a ferromagnetic gel
OwnerAlban Gossard, Fabien Frances +1inventors
InventorsAlban Gossard, Fabien Frances, Hubert-Alexandre Turc
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Abstract
Disclosed a method for decontaminating a surface of a substrate or a method for decontaminating a gaseous medium using an inorganic ferromagnetic gel consisting of a colloidal solution comprising an inorganic thickening agent, a ferromagnetic compound and a solvent.
Claims23
A method for decontaminating at least one surface of a substrate of a solid material, said surface being contaminated with at least one contaminant species located on said surface and/or below said surface (subsurface) in the first layers of the substrate, wherein at least one cycle comprising the following successive steps is performed:
- a) an inorganic ferromagnetic gel consisting of a colloidal solution comprising an inorganic viscosifier, a ferromagnetic compound and a solvent is applied to said surface, and then the gel applied to the surface is moved and spread at a distance using a magnet;
- b) the gel is maintained on the surface at least for a time sufficient for the gel to destroy and/or inactivate and/or degrade and/or absorb the contaminant species, and for the gel to dry and form a dry, solid residue containing said contaminant species on the surface;
- c) the dry, solid residue containing said contaminant species is moved and gathered on the surface using a magnet, and the dry, solid residue containing said contaminant species is recovered.
A method for decontaminating a volume of a gaseous medium contaminated with suspended contaminant species, said volume of a gaseous medium being in contact with at least one surface of a solid substrate, said method comprising the following successive steps:
- a) an inorganic ferromagnetic gel consisting of a colloidal solution comprising an inorganic viscosifier, a ferromagnetic compound and a solvent is sprayed into said volume of a gaseous medium of fine droplets, thereby forming a mist;
- b) the suspended contaminant species are captured, taken up by said droplets of ferromagnetic gel;
- c) the droplets of ferromagnetic gel containing the suspended contaminant species captured are moved under the action of a magnet until they are deposited and accumulate on a determined zone of said surface of the solid substrate;
- d) the gel is maintained on the determined zone of the surface of the solid substrate at least for a time sufficient for the gel to dry and form a dry, solid residue containing the suspended contaminant species captured;
- e) the dry, solid residue containing said suspended contaminant species captured is recovered.
Dependencies are inferred from the claim text.