High Retention Immobilization of Iodine in B-Bi-Zn Oxide Glass Using Bi2O3 as a Stabilizer under a N2 Atmosphere.
High Retention Immobilization of Iodine in B-Bi-Zn Oxide Glass Using Bi2O3 as a Stabilizer under a N2 Atmosphere.
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DOI：
10.1021/acs.inorgchem.2c03601
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发表时间：
2022-11
影响因子：
4.6
通讯作者：
Qiang Xian;X. Xiao;Jiaping Yu;Y. Gan;Li Chen;Xinmiao He;Enchao Wang;Hui Dan;Lin Zhu;Yi Ding;Tao Duan
中科院分区：
文献类型：
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作者：
Qiang Xian;X. Xiao;Jiaping Yu;Y. Gan;Li Chen;Xinmiao He;Enchao Wang;Hui Dan;Lin Zhu;Yi Ding;Tao Duan
碘废物的固定化在热处理过程中碘损失严重。在此，我们报道了在N2气氛下使用Bi 2 O3作为稳定剂的B-Bi-Zn氧化物玻璃中的模拟放射性碘污染的Bi 0-SiO2吸附剂的高碘保留固定化。研究了Bi 2 O3含量和烧结气氛对碘固定化行为（碘保留率、相组成、显微结构和化学稳定性）的影响。结果发现，BiI 3的分解被阻止通过添加Bi 2 O3和在N2气氛中烧结。在所获得的玻璃废物形式中的碘保留率随着Bi 2 O3含量的增加和在N2气氛中的烧结由于协同效应而显著增强。所获得的创纪录的高碘保留率（92.22 ± 2.6%）远高于常规热处理路线（18.01 ± 3.5%）。结果表明，通过形成稳定的BixOyI（Bi 5 O 7I和BiOI），碘被有效地固定。此外，所获得的碘废物形式表现出优异的致密性和化学稳定性。该方法具有较高的碘保留率，可有效地消除放射性碘。
The immobilization of iodine waste suffers from serious iodine loss during heat treatment. Herein, we reported on the high iodine retention immobilization of simulated radioiodine-contaminated Bi0-SiO2 sorbent in B-Bi-Zn oxide glass using Bi2O3 as a stabilizer under a N2 atmosphere. The effects of the Bi2O3 content and sintering atmosphere on the iodine immobilization behaviors (iodine retention ratio, phase composition, microstructure, and chemical stability) were investigated. It was found that the decomposition of BiI3 was prevented by adding Bi2O3 and sintering in a N2 atmosphere. The iodine retention ratio in the obtained glass waste form was significantly enhanced with increasing Bi2O3 content and sintering in the N2 atmosphere due to the synergistic effect. The achieved record-high iodine retention (92.22 ± 2.6%) was much higher than that of conventional heat treatment route (18.01 ± 3.5%). The results demonstrated that iodine was effectively immobilized through the formation of stable BixOyI (Bi5O7I and BiOI). Furthermore, the obtained iodine waste form exhibited excellent compactness and chemical stability. Owing to its high iodine retention ratio, this route can be employed to effectively immobilize radioactive iodine.