New insights into the degradation of chloramphenicol and fluoroquinolone antibiotics by peroxymonosulfate activated with FeS: Performance and mechanism
Xu, Hengduo; Sheng, Yanqing
Source PublicationCHEMICAL ENGINEERING JOURNAL
ISSN1385-8947
2021-06-15
Volume414Pages:9
KeywordSulfate radicals Peroxymonosulfate Sulfur-containing minerals Antibiotic Reaction mechanism
DOI10.1016/j.cej.2021.128823
Corresponding AuthorSheng, Yanqing(yqsheng@yic.ac.cn)
AbstractSO4?- 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.
Funding OrganizationNatural Science Foundation of China ; Doctoral Science Foundation of Shandong Province ; Regional Key Project of STS of the Chinese Academy of Sciences
Indexed BySCI
Language英语
WOS KeywordORGANIC CONTAMINANTS ; IRON ; PERSULFATE ; WATER ; REMOVAL ; GENERATION ; OXIDATION ; PATHWAYS ; RADICALS ; OXIDANTS
WOS Research AreaEngineering
WOS IDWOS:000641316100004
Citation statistics
Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/27278
Collection中科院海岸带环境过程与生态修复重点实验室_海岸带环境工程技术研究与发展中心
中科院海岸带环境过程与生态修复重点实验室
Corresponding AuthorSheng, Yanqing
AffiliationChinese Acad Sci, Res Ctr Coastal Environm Engn Technol Shandong Pr, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China
Recommended Citation
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.
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