Detection and speciation of transuranium elements in synthetic groundwater via pulsed-laser excitation Page: 1 of 16
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To be submitted for inclusion in the conference proceedings of the
International Conference on Chemistry and Migration Behavior of Actinides
and Fission Products in the Geosphere, Munich, September 14-18, 1987
CONF-870965—4
DE88 003040
DETECTION AM) SPECIATION OF TRANSURANIUM ELEMENTS IN SYNTHETIC
GROUNDWATER VIA PULSED-LASER EXCITATION
J. V. Beitz, D. L. Bowers, M. M. Doxtader, V. A. Maroni, and D. T. Reed
Argonne National Laboratory
Argonne, IL 60439
USA
The submitted manuscript has been authored
by a contractor of the U S- Government
under contract No. W 31 109'£NG*38-
Accordingly, the U- S Government retains a
nonexclusive, royalty-free license to publish
or reproduce the published form of this
contribution, or allow others to do so, for
U S. Government purposes _
Abstract
High sensitivity methods for detection and speciation of complexed
transuranium ions in synthetic basalt groundwater, and simplified analogs,
are being developed which exploit advances in pulsed laser technology. The
first demonstration of high sensitivity detection of a transuranium ion at
temperatures significantly above ambient is reported using laser photoacoustic
spectroscopy (LPAS). The existence of enhanced LPAS signal amplitudes with
increasing temoerature in aqueous solution is confirmed in LPAS spectra
recorded at 30 C, 60 C and 90 C using micromolar concentrations of ^^Am^+.
A detection sensitivity of 8.5 parts per trillion (weight basis) of ^^Cm®+ in a
simplified basalt groundwater at 22 C has been achieved using laser-induced
fluorescence spectroscopy (LIF). This corresponds to 1 x 10® Cm®+ ions in the
laser beam. The detailed spectroscopic information obtained by this method
points to the existence of previously unobserved Cm®+ species. A brief
assessment of the applicability and sensitivity of LPAS and LIF methods for
speciating transuranium ions in near-neutral pH aqueous solution, such as the
groundwater expected in a basalt nuclear waste repository, is presented.
DISCLAIMER
This report was prepared as an account of work sponsored by an agency of the United States
Government. Neither the United States Government nor any agency thereof, nor any of their
employees, makes any warranty, express or implied, or assumes any legal liability or responsi-
bility for the accuracy, completeness, or usefulness of any information, apparatus, product, or
process disclosed, or represents that its use would not infringe privately owned rights. Refer-
ence herein to any specific commercial product, process, or service by trade name, trademark,
manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recom-
mendation, or favoring by the United States Government or any agency thereof. The views
and opinions of authors expressed herein do not necessarily state or reflect those of the
United States Government or any agency thereof.
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Beitz, J. V.; Bowers, D. L.; Doxtader, M. M.; Maroni, V. A. & Reed, D. T. Detection and speciation of transuranium elements in synthetic groundwater via pulsed-laser excitation, article, January 1, 1987; Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1089912/m1/1/: accessed July 16, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.