Sorption behavior and coordination state of Eu(III) and Cm(III) in hydrochloric acid-methanol mixture/cation exchange resin system studied by time-resolved laser-induced fluorescence spectroscopy
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M. Arisaka
A role of methanol on the enhancement of the sorption of M(III) [M=Eu, Cm] in HCl-CH3OH mixture/cation exchange resin system was investigated by comparing the distribution coefficient of M(III) with its coordination states both in the solution and the resin phases. The inner-sphere hydration number (NH2O) of M(III), i.e., the number of water molecules in the first coordination sphere, was determined by the measurement of the luminescence lifetime of M(III) using Time-Resolved Laser-induced Fluorescence Spectroscopy. From the results showing a decrease of NH2O with an increase of methanol mole fraction (XCH3OH), it was found that the inner-sphere complexations of M(III) both with Cl- in the solution phase and with exchange group, SO3-, in the resin phase were promoted with an increase of XCH3OH. The variation of the coordination environment around Eu(III) estimated from the emission spectra was correlated well with the variation of the NH2O. It was concluded that the increase of the sorption is mainly resulted from the inner-sphere complexation of M(III) with SO3- in the resin phase.
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Articles in the same Issue
- Separation of 248Cm from a 252Cf neutron source for production of Cm targets
- Investigation of separation/purification methodologies for the determination of 232U and 236Pu in solution of spent nuclear fuels by α-spectrometry
- Thermodynamics of dioxoneptunium(V) complexation by dicarboxylic acids
- Electrochemical and spectrophotometric investigations of neptunium in alkaline media
- Synergistic extraction of U(VI) with mixtures of 2-ethyl hexyl phosphonic acid-mono-2-ethyl hexyl ester (PC-88A) and TBP, TOPO or Cyanex 923
- Determination of fictive binary data for uranium(IV) nitrate: preliminary results
- The preparation and decomposition of methylhydrazine oxalate and its application as cleaning extractant
- Sorption behavior and coordination state of Eu(III) and Cm(III) in hydrochloric acid-methanol mixture/cation exchange resin system studied by time-resolved laser-induced fluorescence spectroscopy
- Detection of radioactive hot particles in environmental samples using a Marinelli-beaker measuring geometry
