Metal-Organic-Framework Glasses as Rad Contaminant Sequesters and Nuclear Waste Forms

Technical Report · Tue Sep 18 00:00:00 EDT 2018

DOI:https://doi.org/10.2172/1472005· OSTI ID:1472005

Li, Dien ^[1]

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1. Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

Remediation of Tc remains an unresolved challenge at SRS and other DOE sites. The objective of this project was to develop novel metal organic framework (MOF) glasses for radioactive contaminant sequestration and stabilization from aqueous media. We synthesized, characterized and evaluated ten MOFs of known crystal structure and chemistry for screening MOFs for TcO₄^- and ReO₄^- sequestration. MIL-101(Cr) was most effective for TcO₄^- and ReO₄^- sequestration from artificial groundwater at equilibration pH values with the removal capacity of 0.076 mg/g for Tc and 0.197 mg/g for Re. MIL-101(Fe), SLUG-22 and UiO- 66- NO₂ were moderately effective under similar conditions (pH < 8). These results established a solid foundation for further development of MIL-101(Cr) and new MOFs to increase TcO₄^- removal capacity and improve MOF structural stability in FY19.This research may provide a highly applicable platform for solving critical DOE and industrial problems related to nuclear environmental stewardship and nuclear power production.

• Research Organization: Savannah River Site (SRS), Aiken, SC (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC09-08SR22470
• OSTI ID: 1472005
• Report Number(s): SRNL-STI-2018-00512
• Country of Publication: United States
• Language: English