Details

Autor(en) / Beteiligte

• Xue, Jiali
• Zhang, Kuibao
• He, Zongsheng
• Zhao, Wenwen
• Li, Weiwei
• Xie, Dayan
• Luo, Baozhu
• Xu, Kai
• Zhang, Haibin

Titel

Rapid Immobilization of Simulated Radioactive Soil Waste Using Self-Propagating Synthesized Gd₂Ti₂O₇ Pyrochlore Matrix

Ist Teil von

• Materials, 2019-04, Vol.12 (7), p.1163

Ort / Verlag

Switzerland: MDPI AG

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• A rapid and effective method is necessary in the disposal of severely radioactive contaminated soil waste. Simulated Ce-bearing radioactive soil waste was immobilized by self-propagating high-temperature synthesis (SHS) within 5 min in this study. The main work includes the rapid synthesis of soil waste forms, the analysis of phase composition, microstructure and chemical durability. These results show that the simulated nuclide Ce was successfully immobilized into the pyrochlore-rich waste matrice, whose main phases are SiO₂, pyrochlore (Gd₂Ti₂O₇) and Cu. The normalized leaching rates of Si and Na on the 42nd day are 1.86 × 10 and 1.63 × 10 g·m ·d , respectively. And the normalized leaching rate of Ce also remains at low level (10 -10 g·m ·d ) within 42 days.