Methods and fluids for removal of contaminants from surfaces

Details Methods and fluids for removal of contaminants from surfaces Methods and fluids for removal of contaminants from surfaces

B - Operations, Transporting

08

B

B08B 3/08 (2006.01) C11D 1/34 (2006.01) C11D 3/00 (2006.01) C11D 3/02 (2006.01) C11D 3/20 (2006.01) C11D 3/30 (2006.01) C11D 3/33 (2006.01) C11D 7/08 (2006.01) C11D 11/00 (2006.01) C23G 1/02 (2006.01) C11D 1/62 (2006.01) C11D 1/72 (2006.01)

Patent

CA 2158990

A cleaning process and water-based cleaning compositions effective for the removal of radionuclides, polychlorinated biphenyls, pesticides, herbicides, and heavy metals from surfaces of all types, more especially porous surfaces, surfaces that contain irregularities and microspcopic voids into which contaminants may migrate and lodge thereby creating a substrate below the surface that must also be cleaned, and particulate surfaces. The cleaning blends and processes remove contaminants from porous and irregular surfaces to such a depth below the surface and into the substrate, and to such an extent, that the cleaned surface satisfies current regulations promulgated by the EPA and NRC relating to standards for decontamination. The process also allows sealing of cleaned surfaces, if desired, with an impermeable coating of a synthetic polymeric composition in order to retard subsequent migration of any residual contaminants to the surface.

Procédés de nettoyage et compositions de nettoyage à base d'eau éliminant efficacement les radionucléides, les biphényles polychlorés, les pesticides, les herbicides et les métaux lourds de surfaces de tous types, notamment de surfaces poreuses, de surfaces contenant des irrégularités et des cavités microscopiques dans lesquelles les substances contaminantes peuvent pénétrer et se loger, créant ainsi au-dessous de la surface un substrat qui doit aussi être nettoyé, et de surfaces particulaires. Les mélanges détergents et les procédés permettent d'éliminer les substances contaminantes des surfaces poreuses et irrégulières à une profondeur au-dessous de la surface et dans le substrat, et dans une mesure telles que la surface satisfait aux prescriptions de l'EPA et du NCR relatives aux normes de décontamination. Si on le désire, ce procédé permet également de sceller les surfaces nettoyées à l'aide d'un revêtement imperméable d'une composition polymère synthétique, afin de retarder la migration subséquente de toute substance contaminante résiduelle vers la surface.

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