Time-resolved laser fluorescence spectroscopy study of the sorption of Cm(III) onto smectite and kaolinite.

摘要: For long-term performance assessment of nuclear waste repositories knowledge concerning interactions actinides with mineral surfaces is imperative. The mobility and bioavailability released radionuclides strongly dependent on sorption/desorption processes onto surfaces. Therefore it necessary to characterize the surface species formed elucidate reaction mechanisms involved. high fluorescence spectroscopic sensitivity Cm(III) has attracted our interest regarding complexation process smectite kaolinite as a model system for sorption trivalent in trace concentration range. We conclude that at low pH sorbed an outer-sphere complex retains its complete primary hydration sphere. With increasing inner-sphere adsorption occurs via aluminol edge sites. same evolution Cm(III)-clay function was observed both miner...