Treatment of surfaces to stabilize heavy metals

C - Chemistry – Metallurgy – 09 – D

Patent

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Details

C09D 7/12 (2006.01) A62D 3/33 (2007.01)

Patent

CA 2481038

A reactive coating composition and method for treating a surface including heavy metals by applying the reactive coating composition to the surface. The surface can be, for example, a paint layer containing heavy metals. The reactive coating composition includes a stabilizing agent to stabilize the heavy metal and a permeability enhancing agent to increase the permeability of the paint layer, facilitating the reaction of the heavy metal with the stabilizing agent. The structure including the treated paint layer can be left in place or can be disposed in a non-hazardous landfill.

La présente invention concerne une composition de revêtement réactive et un procédé pour traiter une surface comprenant des métaux lourds par application de ladite composition de revêtement réactive sur ladite surface. La surface peut par exemple être une couche de peinture contenant des métaux lourds. La composition de revêtement réactive comprend un agent de stabilisation conçu pour stabiliser le métal lourd et un agent d'amélioration de perméabilité conçu pour augmenter la perméabilité de la couche de peinture, ce qui facilite la réaction du métal lourd avec l'agent de stabilisation. La structure comprenant la couche de peinture traitée peut rester en place ou peut être placée dans un site d'enfouissement non dangereux.

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