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Radiochimica Acta

International Journal for chemical aspects of nuclear science and technology

Ed. by Qaim, Syed M.

12 Issues per year

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Rank 7 out of 33 in category Nuclear Science & Technology in the 2013 Thomson Reuters Journal Citation Report/Science Edition

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Evaluation of novel getters for adsorption of radioiodine from groundwater and waste glass leachates

S. V. Mattigod / G. E. Fryxell / R. J. Serne / K. E. Parker

Citation Information: Radiochimica Acta/International journal for chemical aspects of nuclear science and technology. Volume 91, Issue 9/2003, Pages 539–546, ISSN (Print) 0033-8230, DOI: 10.1524/ract.91.9.539.20001, September 2009

Publication History

Published Online:
2009-09-25

Summary

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-, had very high affinities for adsorption of radioiodine (Kd ∼ 1×104 – 4×105 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.

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