Patent ID: 9359582
Filing Date: 2016-06-07
CPC Classification: C11D,G21F

Claim Text:
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; the aqueous solution comprises a molar (M) concentration of about 0.01 M to about 0.5 M of a multi-dentate organic acid chelating agent, and about 0.02 to about 1 M carbonate salt; and the polymer mixture optionally includes at least one particulate sequestering agent.