Rapid Immobilization of Simulated Radioactive Soil Waste Using Self-Propagating Synthesized Gd(2)Ti(2)O(7) Pyrochlore Matrix

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 w...

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Autores principales: Xue, Jiali, Zhang, Kuibao, He, Zongsheng, Zhao, Wenwen, Li, Weiwei, Xie, Dayan, Luo, Baozhu, Xu, Kai, Zhang, Haibin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6479954/
https://www.ncbi.nlm.nih.gov/pubmed/30974761
http://dx.doi.org/10.3390/ma12071163
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author Xue, Jiali
Zhang, Kuibao
He, Zongsheng
Zhao, Wenwen
Li, Weiwei
Xie, Dayan
Luo, Baozhu
Xu, Kai
Zhang, Haibin
author_facet Xue, Jiali
Zhang, Kuibao
He, Zongsheng
Zhao, Wenwen
Li, Weiwei
Xie, Dayan
Luo, Baozhu
Xu, Kai
Zhang, Haibin
author_sort Xue, Jiali
collection PubMed
description 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 SiO(2), pyrochlore (Gd(2)Ti(2)O(7)) 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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spelling pubmed-64799542019-04-29 Rapid Immobilization of Simulated Radioactive Soil Waste Using Self-Propagating Synthesized Gd(2)Ti(2)O(7) Pyrochlore Matrix Xue, Jiali Zhang, Kuibao He, Zongsheng Zhao, Wenwen Li, Weiwei Xie, Dayan Luo, Baozhu Xu, Kai Zhang, Haibin Materials (Basel) Article 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 SiO(2), pyrochlore (Gd(2)Ti(2)O(7)) 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. MDPI 2019-04-10 /pmc/articles/PMC6479954/ /pubmed/30974761 http://dx.doi.org/10.3390/ma12071163 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Xue, Jiali
Zhang, Kuibao
He, Zongsheng
Zhao, Wenwen
Li, Weiwei
Xie, Dayan
Luo, Baozhu
Xu, Kai
Zhang, Haibin
Rapid Immobilization of Simulated Radioactive Soil Waste Using Self-Propagating Synthesized Gd(2)Ti(2)O(7) Pyrochlore Matrix
title Rapid Immobilization of Simulated Radioactive Soil Waste Using Self-Propagating Synthesized Gd(2)Ti(2)O(7) Pyrochlore Matrix
title_full Rapid Immobilization of Simulated Radioactive Soil Waste Using Self-Propagating Synthesized Gd(2)Ti(2)O(7) Pyrochlore Matrix
title_fullStr Rapid Immobilization of Simulated Radioactive Soil Waste Using Self-Propagating Synthesized Gd(2)Ti(2)O(7) Pyrochlore Matrix
title_full_unstemmed Rapid Immobilization of Simulated Radioactive Soil Waste Using Self-Propagating Synthesized Gd(2)Ti(2)O(7) Pyrochlore Matrix
title_short Rapid Immobilization of Simulated Radioactive Soil Waste Using Self-Propagating Synthesized Gd(2)Ti(2)O(7) Pyrochlore Matrix
title_sort rapid immobilization of simulated radioactive soil waste using self-propagating synthesized gd(2)ti(2)o(7) pyrochlore matrix
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6479954/
https://www.ncbi.nlm.nih.gov/pubmed/30974761
http://dx.doi.org/10.3390/ma12071163
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