abstract
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Measurements of Raman spectra of U(VI) ions loaded silver and silver oxide colloidal particles have been carried out for wide range of pH of the aqueous suspension. It was observed that Raman active symmetric stretching frequency of UO22+ ion shifts to smaller wavenumber when adsorbed onto silver colloidal particle, and that the shift depends on pH of the suspension. This observation discounts the case that all U(VI) ligands are liberated following the adsorption onto silver colloidal particle.
The spectra of U(VI) ions loaded silver and silver oxide colloidal particles have been compared, and the difference between the two spectra was explained as the difference of the forms of their adsorption.