New insights into the degradation of chloramphenicol and fluoroquinolone antibiotics by peroxymonosulfate activated with FeS: Performance and mechanism
文献类型：期刊论文
| 作者 | Xu, Hengduo; Sheng, Yanqing
|
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2021-06-15 |
| 卷号 | 414页码:9 |
| 关键词 | Sulfate radicals Peroxymonosulfate Sulfur-containing minerals Antibiotic Reaction mechanism |
| ISSN号 | 1385-8947 |
| DOI | 10.1016/j.cej.2021.128823 |
| 通讯作者 | Sheng, Yanqing(yqsheng@yic.ac.cn) |
| 英文摘要 | SO4?- and ?OH are recognized as valid reactive species in the FeS-activated persulfate system. However, whether other reactive species are generated in this process remains unclear. In this study, a FeS-based peroxymonosulfate (PMS) (FeS/PMS) system was developed for the degradation of chloramphenicol (i.e., chloramphenicol (CAP) and thiamphenicol (TAP)) and fluoroquinolone (i.e., ciprofloxacin (CIP) and norfloxacin (NOR)) antibiotics. In addition to SO4?- and ?OH, Fe(IV) was identified as another reactive species by using methyl phenyl sulfoxide (PMSO) and methyl phenyl sulfone (PMSO2) as probe compounds. Although Fe(IV) participated in antibiotic degradation, the contribution of Fe(IV) was smaller than that of SO4?- due to its low redox potential and weak competition ability. Efficient degradation of antibiotics was achieved in the FeS/PMS system within 120 min using 6 mM PMS and 0.6 g/L FeS at initial pH of 7.0, with removal percentages of 93.5%, 98.5%, 100% and 100% for CAP, TAP, CIP and NOR, respectively. The S2- acted as an electron donor to facilitate continuous Fe(III) reduction and Fe(II) regeneration. Based on the degradation intermediates of antibiotic, the reaction pathways were proposed to involve side chain cleavage, hydroxylation, denitration, deoxygenation, decarboxylation and dehalogenation. In addition to its performance in simulated waters, the FeS/PMS system also presented effective antibiotic degradation in real surface water. This study provides new insights into the mechanism of multiple reactive species generation in the FeS-activated PMS process and extends the potential engineering applications in antibiotic degradation and in situ water quality remediation. |
| WOS关键词 | ORGANIC CONTAMINANTS ; IRON ; PERSULFATE ; WATER ; REMOVAL ; GENERATION ; OXIDATION ; PATHWAYS ; RADICALS ; OXIDANTS |
| 资助项目 | Natural Science Foundation of China[51908542] ; Doctoral Science Foundation of Shandong Province[ZR2019BEE045] ; Regional Key Project of STS of the Chinese Academy of Sciences[KFJSTSQYZX057] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000641316100004 |
| 资助机构 | Natural Science Foundation of China ; Doctoral Science Foundation of Shandong Province ; Regional Key Project of STS of the Chinese Academy of Sciences |
| 源URL | [http://ir.yic.ac.cn/handle/133337/27277]  |
| 专题 | 烟台海岸带研究所_山东省海岸带环境工程技术研究中心 烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室 |
| 通讯作者 | Sheng, Yanqing |
| 作者单位 | Chinese Acad Sci, Res Ctr Coastal Environm Engn Technol Shandong Pr, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Hengduo,Sheng, Yanqing. New insights into the degradation of chloramphenicol and fluoroquinolone antibiotics by peroxymonosulfate activated with FeS: Performance and mechanism[J]. CHEMICAL ENGINEERING JOURNAL,2021,414:9. |
| APA | Xu, Hengduo,&Sheng, Yanqing.(2021).New insights into the degradation of chloramphenicol and fluoroquinolone antibiotics by peroxymonosulfate activated with FeS: Performance and mechanism.CHEMICAL ENGINEERING JOURNAL,414,9. |
| MLA | Xu, Hengduo,et al."New insights into the degradation of chloramphenicol and fluoroquinolone antibiotics by peroxymonosulfate activated with FeS: Performance and mechanism".CHEMICAL ENGINEERING JOURNAL 414(2021):9. |
入库方式： OAI收割
来源：烟台海岸带研究所
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