| 摘要 |
A cleaning process and water-based cleaning compositions effective for the r emoval of radionuclides, polychlorinated biphenyls, pesticides, herbicides, and heavy metals from surfaces of all types, more es pecially porous surfaces, surfaces that contain irregula rities and microspcopic voids into which contaminants may migrate and lodge thereby cre ating a substrate below the surface that must also be cl eaned, and particulate surfaces. The cleaning blends and processes remove contamina nts from porous and irregular surfaces to such a depth b elow 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 s ealing of cleaned surfaces, if desired, with an impermea ble coating of a synthetic polymeric composition in order to retard subsequent m igration of any residual contaminants to the surface.
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