Novel synthesis of Bi-Bi2O3-TiO2-C composite for capturing iodine-129 in off-gas
| Autor: | Xiao‐qiang Jiang, Ning Pan, Facheng Yi, Xiaoqiang Wang, Mian-xin Song, Hao Zou, Liang Bian, Weimin Li |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
021110 strategic
defence & security studies Environmental Engineering Materials science Health Toxicology and Mutagenesis Composite number 0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences engineering.material 01 natural sciences Pollution Outgassing Nuclear reprocessing Adsorption Coating Physisorption Chemical engineering Amorphous carbon Chemisorption engineering Environmental Chemistry Waste Management and Disposal 0105 earth and related environmental sciences |
| Zdroj: | Journal of Hazardous Materials. 365:81-87 |
| ISSN: | 0304-3894 |
| DOI: | 10.1016/j.jhazmat.2018.11.001 |
| Popis: | The Bi-Bi2O3-TiO2-C composites were prepared by a sol-gel method and investigated for capturing iodine-129 (129I) in off-gas producing from spent fuel reprocessing. Firstly, the optimal process conditions were operated through the orthogonal experiments, showing that the capturing capacity of the optimal composite was calculated about 504.0 ± 19.5 mg/g, which is approximately 2.0-fold higher than that of the commercial silver-exchanged zeolites (AgX). Secondly, the structure and morphology of the Bi-Bi2O3-TiO2-C composite were characterized, suggesting that the Bi is regularly spherical in the shape, coating by the Bi2O3, TiO2 and amorphous carbon. Finally, the mechanism for the iodine adsorption in the Bi-Bi2O3-TiO2-C system was revealed, demonstrating that the iodine was captured by physisorption and chemisorption. |
| Databáze: | OpenAIRE |
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