AI Article Synopsis
- * By adding BiO as a stabilizer and using a nitrogen atmosphere for sintering, the researchers found that the iodine retention ratio significantly increased, reaching a record high of 92.22%.
- * The research highlights the formation of stable BiOI compounds and demonstrates that this new method offers improved compactness and chemical stability for the safe immobilization of radioactive iodine waste.
Article Abstract
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 Bi-SiO sorbent in B-Bi-Zn oxide glass using BiO as a stabilizer under a N atmosphere. The effects of the BiO 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 BiI was prevented by adding BiO and sintering in a N atmosphere. The iodine retention ratio in the obtained glass waste form was significantly enhanced with increasing BiO content and sintering in the N 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 BiOI (BiOI 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.
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| http://dx.doi.org/10.1021/acs.inorgchem.2c03601 | DOI Listing |
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