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Spectroscopy of Plutonium-Organic Complexes

Published online by Cambridge University Press:  15 February 2011

M. K. Richmann and
D. T. Reed
M. K. Richmann
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
D. T. Reed
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
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Abstract

Information on the spectroscopy of plutonium-organic complexes is needed to help establish the speciation of these complexes under environmentally relevant conditions. Laser photoacoustic spectroscopy (LPAS) and absorption spectrometry were used to characterize the Pu(IV)-citrate and Pu(IV)-nitrilotriacetic acid (NTA) complexes at concentrations of 1−3 – 10−7 M in aqueous solution. Good agreement was observed between the band shape of the LPAS and absorption spectra for the Pu(IV)-NTA complex. Agreement for the Pu(IV)-citrate complex was not quite as good. In both cases, a linear dependence of the LPAS signal on laser power and total concentration of the complexes was noted. This work is part of an ongoing research effort to study key subsurface interactions of plutonium-organic complexes.

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