| 第一作者： | Zhang, Hongda |
|---|---|
| 英文第一作者： | Zhang, Hongda |
| 联系作者： | Yu, Yong |
| 英文联系作者： | Yu, Yong |
| 发表年度： | 2022 |
| 卷： | 379 |
| 摘要： | A low-cost nitrogen and sulfur doped biochar (CNS) was prepared by oxygen limiting method using pine needles. In the CNS/PDS system, the degradation rate of tetracycline hydrochloride (TCH) reached 85.6% in 20 min when the pyrolysis temperature was 800 degrees C. X-ray photoelectron spectroscopy and Raman spectroscopy showed that high-temperature pyrolysis produced more carbonyl and defect, which enhanced the activation efficacy of CNS for PDS. Electron paramagnetic resonance and radical quenching have demonstrated that O2 center dot-and 1O2 played key roles in radical pathway. A novel mechanism for degradation of TCH by electron transfer pathway was proposed by linear sweep voltammetry and electrochemical impedance spectroscopy. CNS served as a transport mediator and the electrons of TCH were continuous transferred to PDS via CNS, which accelerated its oxidation. Moreover, density functional theory demonstrated that pyrrolic N combined with the H atom of PDS to form an N-H structure and generated a PDS-catalyst complex. The projected density of state results showed that pyrrolic N and thiophene S further speeded up the electron transfer process due to their closer proximity to 0 Fermi level. This study provides insight into the reaction mechanism of heteroatom doped biochar for treatment of organic pol-lutants in aquatic environments. |
| 刊物名称： | Journal of Cleaner Production |
| 参与作者： | Zhang, H. D., et al. |
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N and S co-doped pine needle biochar activated peroxydisulfate for antibiotic degradation
本站小编 Free考研考试/2024-01-13
N and S co-doped pine needle biochar activated peroxydisulfate for antibiotic degradation
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