Functionalized Nanoporous Sorbents for Adsorption of Radioiodine from Groundwater and Waste Glass Leachates

Book · Mon Jul 02 04:00:00 EDT 2007

OSTI ID:919302

Mattigod, Shas V; Fryxell, Glen E; Parker, Kent E

Performance tests were conducted using novel sorbent 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 sorbents 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 ~1x104 – 4x105 ml/g). The iodide adsorption performance of these novel sorbents was from one to two orders of magnitude better than many natural mineral and modified mineral sorbents. These data indicate that the novel nanoporous sorbent 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.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 919302
• Report Number(s): PNWD-SA-7463
• Country of Publication: United States
• Language: English

Related Subjects

12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES
36 MATERIALS SCIENCE
ADSORBENTS
ADSORPTION
IODIDES
LEACHATES
LEACHING
LOW-LEVEL RADIOACTIVE WASTES
MERCURY
PERFORMANCE TESTING
RADIOACTIVE MATERIALS
SILVER
THIOLS
WASTE FORMS
WEATHERING