Complex formation of uranium(VI) in periodate solutions
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M. Karbowiak
Summary
The uranyl/periodate system was investigated by Time-Resolved Laser-Induced Fluorescence Spectroscopy (TRLIFS), and Capillary Electrophoresis (CE) in 0.1 and 0.05 mol L-1 perchloric solutions at pH 2.6, containing various amounts of periodate anions. The formation of only one complex, UO2IO4+, was observed for a periodate concentration ranging from 5×10-5 to 10-1 mol L-1. The stability constant of this complex was estimated to be log β11=1.8±0.2 by TRLIFS (fluorescence titration) and log β11=2.0±0.2 by CE, for an ionic strength of 10-1 and 5×10-2 mol L-1, respectively. Moreover, the 1:1 stoichiometrical ratio between uranium(VI) and periodate was confirmed by an analysis of the results obtained from the deconvolution of fluorescence spectra.
© 2004 Oldenbourg Wissenschaftsverlag GmbH
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Artikel in diesem Heft
- Experimental studies and nuclear model calculations on (p, xn) and (p, pxn) reactions on 85Rb from their thresholds up to 100 MeV
- Theoretical treatment of the complexation of element 106, Sg, in HF solutions
- Extraction and separation of Am(III) and Sr(II) by N,N,N´,N´-tetraoctyl-3-oxapentanediamide (TODGA)
- Method for determining plutonium in air filters in detection of nuclear activities
- Advanced aqueous reprocessing in P&T strategies: Process demonstrations on genuine fuels and targets
- Uranium association with halophilic and non-halophilic bacteria and archaea
- Complex formation of uranium(VI) in periodate solutions
- Fluorescence and IR studies on the hydration state of lanthanides(III) and curium(III) in the complexes extracted with purified Cyanex301, Cyanex302 and Cyanex272
- Synthesis and characterization of uranium(VI) and thorium(IV) complexes with o-hydroxy N,N´-dimethylbenzylamine and o-carboxy N,N´-dimethylbenzylamine
- Ion exchange and chromatographic separation of cesium, strontium and europium from acidic streams using uranium antimonate
- Investigations on adsorption and transport behaviour of carrier-free silver, gold and platinum in quartz columns under vacuum conditions
