JRP 05-11
Partners
ContactDr. H. FoerstendorfForschungszentrum Rossendorf - Institut für Radiochemie - P.O. Box 510119 - 01314 Dresden - Germany  
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Probing the interaction of Actinides with the functional species of mineral/electrolyte interfaces by Sum Frequency Vibrational SpectroscopyStatus
GoalsThe aim of this joint research project is to predict the mobility of actinides and other radioisotopes in an aquifer. This requires a profound understanding of the interaction of the aquatic phase with the mineral surfaces at the molecular level. The project will combine a tunable light source with wavelengths of up to ~20 µm (to investigate the coupling of actinides and other heavy metal ions to the functional species) and a second (auxiliary) laser at a fixed frequency (for other nonlinear optical experiments). Expected resultsThe experiment will provide a facility for actinide and radionuclide research that is unique in the world. During the next years, a great deal of information on the bonding of radioisotopes to mineral surfaces in aquatic environment will be obtained (types of formed surface complexes, stability constants, etc.). A better knowledge of surface functional groups and of their binding to actinides will clarify the bases of surface complexation models. It will lead to modelization of experimental data in better agreement with real surface processes. In addition, it will enhance the validation of migration predictions and the safety of radioactive waste depositories. Reports |
