Evaluation of Novel Getters for adsorption of radioiodine from Groundwater and waste glass leachates

Journal Article · Mon Sep 15 04:00:00 EDT 2003 · Radiochimica Acta, 91):539-545

DOI:https://doi.org/10.1524/ract.91.9.539.20001· OSTI ID:15010504

Mattigod, Shas V; Fryxell, Glen E; Serne, R JEFFREY; Parker, Kent E

Performance tests were conducted using novel getter materials that can immobilize or delay the transport of radioiodine that would be released during physical and chemical degradation of solidified low-level waste packages. The results showed that metal-capped novel getters such as Hg-thiol and Ag-thiol Self-Assembled Monolayers on Mesoporous Silica (SAMMS), designed specifically to adsorb soft anions such as I{sup -}, had very high affinities for adsorption of radioiodine (K{sub d} {approx} 1 x 10{sup 4} - 4 x 10{sup 5} ml/g). The iodide adsorption performance of these novel getters was from one to two orders of magnitude better than many natural mineral and modified mineral getters. These data indicate that the novel getter materials are capable of significantly retarding the mobility of radioiodine leaching from physically and chemically weathered low-level waste glass packages during various physical and chemical weathering reactions expected during long-term disposal in the vadose zone.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 15010504
• Report Number(s): PNNL-SA-38963; 820201000
• Journal Information: Radiochimica Acta, 91):539-545, Journal Name: Radiochimica Acta, 91):539-545
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES