Control of Redox Conditions During Sorption Measurements

摘要

The sorption properties of a nuclide may be strongly dependent on its valence, so it is important to determine the valence state of the nuclide and its adsorbed species. The usual methods of valence state determination are spectrophotometry, solvent extraction, and coprecipitation. The problem of determining the valence state of an adsorbed species at low concentration levels is discussed. Potential pH diagrams may be used to predict the valence state change of a reaction. Redox buffers may be used in order to control the valence state of an element in sorption experiments. The electrolytic method of controlling valence has been found to be a particularly convenient method. (ERA citation 09:002907)