Rapid disposal of simulated Ce-bearing radioactive soil waste using self-propagating synthesized zirconolite-rich waste matrice

Xue, Jiali; Zhang, Kuibao; He, Zongsheng; Zhao, Wenwen; Li, Weiwei; Xie, Dayan; Zhang, Haibin

doi:10.1016/j.ceramint.2018.05.070

Cited by 14 publications

(1 citation statement)

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“…The NR ce values vary irregularly but remain at a low level (10 −5 –10 −6 g·m −2 ·d −1 ). Compared with our previous research results [38], the leaching rate of Si is slightly lower in this study. The NR Na of the Cu-20 sample is similar to that of borosilicate glass-ceramics [39].…”

Section: Resultscontrasting

confidence: 84%

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

Xue

Zhang

et al. 2019

Materials

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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 × 10−3 and 1.63 × 10−2 g·m−2·d−1, respectively. And the normalized leaching rate of Ce also remains at low level (10−5–10−6 g·m−2·d−1) within 42 days.

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Section: Resultscontrasting

confidence: 84%