التفاصيل البيبلوغرافية
| العنوان: |
Selective removal of phenolic contaminants for carbon recycling by activated persulfate based on oxidative polymerization mechanism. |
| المؤلفون: |
Wang, Renjie1 (AUTHOR), Chen, Hao1 (AUTHOR), Zhang, Linyue1 (AUTHOR), Wang, Jinnan1 (AUTHOR) wjnnju@163.com, Li, Aimin1 (AUTHOR), François-Xavier Corvini, Philippe2 (AUTHOR) |
| المصدر: |
Chemical Engineering Journal. May2024, Vol. 487, pN.PAG-N.PAG. 1p. |
| مصطلحات موضوعية: |
*POLLUTANTS, *CATALYTIC polymerization, *PLANT polyphenols, *ACTIVATED carbon, *HYDROXYL group, *REACTIVE oxygen species, *BISPHENOLS, *POLYMERIZATION |
| مستخلص: |
[Display omitted] • CuO@CuCe y O 1+2y+x/2 -IE is prepared for catalytic oxidative polymerization. • More than 80% of phenolic contaminants are converted into polyphenols and recycled. • Cu(III) formed on catalyst surface promote O 2 •− conversion to 1O 2. • 1O 2 attack phenolic hydroxyl group with production of phenoxenium ion. • C-O coupling make phenoxenium ion form polyphenolic polymers. A novel approach for selective removal of phenolic contaminants and polyphenols recycling based on oxidative polymerization is explored, which is significantly different from conventional degradation processes. Plenty of bridging OH− and lattice oxygen are bound on CuO@CuCe y O 1+2y+x/2 -IE due to strong coordination between Ce and O, which induced formation of Cu(III) with high redox potential. Cu(III) could not only form outer-sphere complexation with peroxymonosulfate (PMS) for enhancement of O 2 •– production involving series of chain reactions, but also promote O 2 •– conversion to singlet oxygen (1O 2). Owing to electrophilicity, 1O 2 preferentially attacked the phenolic hydroxyl group with the production of phenoxeniums ions, and phenoxide ions could immediately couple with negatively charged hydroxyl groups of other bisphenol A (BPA) molecular so as to make polymer chains get a sustained growth over CuO@CuCe y O 1+2y+x/2 -IE. Thus, CuO@CuCe y O 1+2y+x/2 -IE can selectively remove phenolic contaminants from water with low oxidant consumption, and simultaneously recycle more than 80 % of polyphenols. In summary, the present work demonstrated the predominant role and mechanism of 1O 2 in triggering the oxidative polymerization of BPA, which contributed to construction of cost-efficient catalytic system for phenolic contaminants conversion into polyphenols. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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