[2G18-21] Vitrification 3

[2G19] Basic research programs of vitrification technology for waste volume reduction

(60)XAFS analysis of rare earth and platinum group elements in simulated borosilicate glasses including phosphorus

*Yoshihiro Okamoto¹, Hideaki Shiwaku¹, Keisuke Shimamura¹, Kouichi Ohyama¹, Hidekazu Kobayashi¹, Takayuki Nagai¹ (1. JAEA)

Keywords:vitrification, borosilicate glass, X-ray absorption fine structure, synchrotron radiation

The chemical state of rare earth elements and the local structure around platinum group metals (PGMs) were evaluated by using synchrotron radiation based XAFS and imaging XAFS techniques. It can be seen from the detailed analyses that ratio of trivalent cerium increases as concentration of P₂O₅ increases in the glass. A similar reduction behavior was detected also for PGM. On the other hand, it was confirmed that the local structure around some elements like Mn, Fe, Zn, Sr, Y and Zr was not changed by adding P₂O₅.