Abstract
The analysis of a highly radioactive mixed waste, a double-shell slurry (DSS-1) waste from the U.S. DOE’s Hanford Site, originally published in 1988, yielded only a 1.2 % accounting of its total organic content (TOC), whereas the analysis of another mixed waste yielded 94.9 %. In this report, the reanalysis of DSS-2, which was carried out immediately, but previously unpublished, using an analysis scheme specifically adapted to the waste’s physicochemical properties, is described. The TOC accounting climbed to 72.3 %, unmasking a complex mixture of semivolatile and hydrophilic organics, including numerous oxidation and/or degradation products. Reevaluation of the DSS-2 data now reveals the presence of several chelator fragments, including nitrosated species.
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Acknowledgments
The authors are indebted to John Green and Gary Richardson for their work in the shielded cell. Earl Martin shared invaluable insights on the chemistry and history of the DSS waste. David Hendren operated the GC/MS system. A young Quentin Dirks helped to whip a very, very early draft of the manuscript into shape. Most of the research described in this article was originally performed at Pacific Northwest Laboratory (PNL), now a national lab (PNNL), which is operated by Battelle Memorial Institute for the United States Department of Energy under Contract DE-AC05-76RL01830.
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Toste, A.P., Lechner-Fish, T.J. & Scheele, R.D. Organics in a Hanford mixed waste revisited: myriad organics and chelator fragments unmasked. J Radioanal Nucl Chem 296, 523–530 (2013). https://doi.org/10.1007/s10967-012-2126-y
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DOI: https://doi.org/10.1007/s10967-012-2126-y
Keywords
- Nuclear waste
- Organic analysis
- Chelating/complexing agents
- Chelator/complexor fragments
- GC/MS