Uranium speciation in solution by time-resolved laser-induced fluorescence
Journal Article
·
· Analytical Chemistry (Washington); (United States)
- CEA, Gif sur Yvette (France)
- CEA, Fontenay aux Roses (France)
Complexation studies of radionuclides (such as uranium) are important to perform in order to predict their migration behavior in natural systems. Time-resolved laser-induced fluorescence, which is a very selective and sensitive method for actinide and lanthanide analysis, is used to study the interactions between uranyl cation and hydroxide ions at low uranium concentration (0.4 [mu]M). The principle of the study is based on time resolution and spectral convolution since free uranyl ion (UO[sub 2][sup 2+]) and first hydroxide complex give specific fluorescence spectra characterized by their spectral shift and fluorescence lifetime. Spectroscopic data (main fluorescence wavelengths, half-bandwidth, lifetime) for the first hydrolyzed complex UO[sub 2]OH[sup +] are obtained. From experimental spectra and time-resolved spectral convolution, the proportion of each species (free uranyl, complexed uranyl) can be estimated at different pH. 33 refs., 5 figs., 3 tabs.
- OSTI ID:
- 6590549
- Journal Information:
- Analytical Chemistry (Washington); (United States), Journal Name: Analytical Chemistry (Washington); (United States) Vol. 67:2; ISSN 0003-2700; ISSN ANCHAM
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
54 ENVIRONMENTAL SCIENCES
540230* -- Environment
Terrestrial-- Radioactive Materials Monitoring & Transport-- (1990-)
663590 -- Nuclear Mass Ranges-- A=220 & Above-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDES
CHARGED PARTICLES
DATA
DISPERSIONS
ELEMENTS
EMISSION SPECTROSCOPY
ENVIRONMENTAL TRANSPORT
EXPERIMENTAL DATA
FLUORESCENCE SPECTROSCOPY
INFORMATION
IONS
LASER SPECTROSCOPY
MANAGEMENT
MASS TRANSFER
METALS
MIXTURES
NUMERICAL DATA
PH VALUE
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE MANAGEMENT
RADIONUCLIDE MIGRATION
SOLUTIONS
SPECTROSCOPY
TIME DEPENDENCE
URANIUM
WASTE DISPOSAL
WASTE MANAGEMENT
400102 -- Chemical & Spectral Procedures
54 ENVIRONMENTAL SCIENCES
540230* -- Environment
Terrestrial-- Radioactive Materials Monitoring & Transport-- (1990-)
663590 -- Nuclear Mass Ranges-- A=220 & Above-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDES
CHARGED PARTICLES
DATA
DISPERSIONS
ELEMENTS
EMISSION SPECTROSCOPY
ENVIRONMENTAL TRANSPORT
EXPERIMENTAL DATA
FLUORESCENCE SPECTROSCOPY
INFORMATION
IONS
LASER SPECTROSCOPY
MANAGEMENT
MASS TRANSFER
METALS
MIXTURES
NUMERICAL DATA
PH VALUE
RADIOACTIVE WASTE DISPOSAL
RADIOACTIVE WASTE MANAGEMENT
RADIONUCLIDE MIGRATION
SOLUTIONS
SPECTROSCOPY
TIME DEPENDENCE
URANIUM
WASTE DISPOSAL
WASTE MANAGEMENT