METIS Scientific

Evaluating the efficiency of DeconGel 1101 for removal of Cs-137, Co-60, and Eu-164 on common commercial construction materials

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Courtesy of METIS Scientific

Decon Gel 1101 sanuncomplicated, lowodor, peelable polymer hydrogel for use with radiological decontamination, manufactured by Cellular Bioengineer Inc†. The gelallows for single or repeated material applications to contaminated surfaces. As the gel dries it binds the contaminant by encapsulating and lifting the contaminant into the gel.The result is a non-sticky rubber-like substance that is easily removed.

Through a series of evaluations conducted with DeconGel 1101, the removal efficiency for materials contaminated with liquid forms of Cs-137,Co-60,and Eu-154 was determined on concrete (both old and new),painted concrete, porcelain tile(with and without grout),granite (with grout),and vinyl composite tile.Initial application with all three nuclides on un-grouted porcelain tile and vinyl composite tile showed greater than 95% removal from the material surface and 80% or greater encapsulated in the gel itself.Both the porcelain and granite grouted tiles showed largest and ard deviations between repetitions, removing between 25% and 85% of the contaminate from the material, with between 25% and 65% encased in the gel. Painted concrete resulted in greater than 95% removal from the material surface with between 45% and 85% of the deposited activity contained in the gel. Results for both the old and new concrete were similar: between 27% and 71% removal from the material surface and between 19% and 40% encapsulated in the gel.

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