Details

Autor(en) / Beteiligte

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

Titel

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

Ist Teil von

• Applied catalysis. B, Environmental, 2022-04, Vol.303, p.120880, Article 120880

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2022

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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 O2•−, 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. [Display omitted] •A carbonaceous catalyst was prepared from coagulation waste to activate periodate.•Electron transfer has a dominant effect on sulfadiazine degradation.•Fe and N could change the electron configuration of carbonaceous catalyst.•Chemisorption between Fe and PI was the key step for the catalytic process.•Sulfadiazine removal can be significantly enhanced under anoxic conditions.