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- Title
Separation of non-pertechnetate species from Hanford AN-107 tank waste.
- Authors
Schroeder, N. C.; Ashley, K. R.
- Abstract
A significant amount of technetium in Hanford waste exists as unidentified, stable, reduced technetium complexes. In order to facilitate the identification of these non-pertechnetate species we have developed a separation scheme which involves three major steps: (1) pretreatment of the sample with Zn<Superscript>2+</Superscript>, (2) cation-exchange to remove gross activity (<Superscript>90</Superscript>Sr), and (3) size exclusion chromatography to remove residual activity and separate the technetium fractions. Addition of Zn<Superscript>2+</Superscript>is used to compete for the complexants that bind strontium without perturbing the pH of the sample. Technetium recovery was ~50%. One technetium fraction was obtained free of residual gross activity.
- Subjects
RADIOACTIVE substances; CHROMATOGRAPHIC analysis; RATIONAL numbers; ALKALINE earth metals; FRANCIUM
- Publication
Journal of Radioanalytical & Nuclear Chemistry, 2005, Vol 263, Issue 3, p567
- ISSN
0236-5731
- Publication type
Article
- DOI
10.1007/s10967-005-0625-9