Fe, N-doped carbonaceous catalyst activating periodate for micropollutant removal: Significant role of electron transfer

Chen, Cheng-Xin ¹He, Lei ¹Wang, Guang-Yuan ¹Jiang, Jun-Qiu ¹Ding, Lan ²Liu, Guo-Shuai ³Ren, Nan-Qi ¹Yang, Shan-Shan ¹Yang, Chao ¹Ding, Jie ¹Lu, Mei-Yun¹

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作者信息

1. Harbin Inst Technol
2. Jilin Univ
3. Jiangnan Univ
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Abstract

In this study, the performance of periodate (PI) on sulfadiazine (SDZ) degradation was evaluated using coagulation solid waste fabricated catalyst (CWBC), obtained by simple pyrolysis. SDZ effectively underwent 98.94% remove within 90 min in the CWBC/PI system. Electron transfer was the predominant mechanism due to the development of an electronic cycle among SDZ, CWBC and PI, where the O-2(center dot-), PFRs, and the reactive iodine species had minor roles. Density functional theory calculations identified that Fe and N could change the electron configuration and break the chemical inertness of carbonaceous material. As a result, electrons on the carbon matrix of CWBC are inclined to travel through the formed Fe-O covalent bond to PI. Further analysis demonstrated that SO42-, humic acid (HA), as well as anoxic conditions greatly facilitated SDZ degradation. This study provides a facile protocol for converting coagulation waste to an efficient catalyst and provides fundamental insights into the degradation mechanisms of micropollutants by activating PI.

Key words

Coagulation waste/Periodate/Electron transfer/DFT/Sulfadiazine/PHOTOACTIVATED PERIODATE/BIOCHAR/DEGRADATION/OXIDATION/RADICALS/DECOLORIZATION/PERSULFATE/ADSORPTION/MECHANISM/WASTE

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量100

参考文献量57

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