| Abstract Scope |
The addition of transition metal ions has been long known to alter the sulfur (as SO42-) solubility in borosilicate-based model nuclear waste glasses. However, the mechanism governing this effect is still unknown. To answer this question, V2O5, Cr2O3, and Fe2O3 have been added to borosilicate-based model nuclear waste glasses and these glasses have been characterized for their short-to-intermediate range structure and the redox chemistry using 11B, 27Al, 51V MAS NMR, Raman, UV-Visible, XPS, EPR and Mössbauer spectroscopic techniques. The sulfur solubility in glasses has been determined by the ICP-OES. The results obtained from these investigations shall be presented. |