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Updated: Aug 29, 2026

On-line Analysis of Nitrogen Containing Compounds in Complex Hydrocarbon Matrixes
Published on: August 5, 2016
Identification of the non-pertechnetate species in Hanford waste tanks, Tc(I)--carbonyl complexes
Wayne W Lukens1, David K Shuh, Norman C Schroeder
1Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. wwlukens@lbl.gov
Abstract:
Immobilization of the high-level nuclear waste stored at the Hanford Reservation has been complicated by the presence of soluble, lower-valent technetium species. Previous work by Schroeder and Blanchard has shown that these species cannot be removed by ion-exchange and are difficult to oxidize. The Tc K-edge XANES spectra of the species in Tanks SY-101 and SY-103 were reported by Blanchard, but they could not be assigned to any known technetium complex. We report that the XANES spectra are most likely those of Tc(I)-carbonyl species, especially fac-Tc(CO)3(gluconate)(2-). This is further supported by EXAFS and 99Tc-NMR studies in nonradioactive simulants of these tank wastes.
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