Patent ID: 8658580
Filing Date: 2014-02-25
Classification: C11D,G21F

Abstract:
1. An aqueous gel composition for removing actinide ions, lanthanide ions, fission product ions, or a combination thereof from a porous surface contaminated therewith; the composition comprising a polymer mixture comprising a gel-forming cross-linked polymer and a linear polymer; wherein the linear polymer is present at a concentration that is less than the concentration of the cross-linked polymer; the polymers are anionic, nonionic or a combination thereof, and the polymer mixture is at least about 95% hydrated with an aqueous solution to form a gel; and the aqueous solution comprises about 0.1 to about 5 percent by weight (wt %) of a multi-dentate organic acid chelating agent, and about 0.02 to about 0.4 molar (M) carbonate salt.