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Enrofloxacin Transformation on Shewanella oneidensis MR-1 Reduced Goethite during Anaerobic-Aerobic Transition
Yan, Wei; Zhang, Jianfeng; Jing, Chuanyong
2016-10-18
Source PublicationENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume50Issue:20Pages:11034-11040
AbstractAntibiotics pollution has become a critical environmental issue worldwide due to its high ecological risk. In this study, rapid degradation of enrofloxacin (ENR) was observed on goethite in the presence of Shewanella oneidensis MR-1 during the transition from anaerobic to aerobic conditions. The abiotic reactions also demonstrated that over 70% with initial concentration of 10 mg L-1 ENR was aerobically removed within 5 min by goethite with adsorbed Fe(II), without especial irradiation and strong oxidants. The results of spin trap electron spin resonance (ESR) experiments provide evidence that Fe(II)/Fe(III) complexes facilitate the generation of center dot OH. The electrophilic attack by center dot OH opens the quinolone ring of ENR and initiates further transformation reactions. Five transformation products were identified using high performance liquid chromatography-quadrupole time-of-flight mass spectrometry and the ENR degradation process was proposed accordingly. The identification of ENR transformation products also revealed that both the surface adsorption and the electron density distribution in the molecule determined the reactive site and transformation pathway. This study highlights an important, but often underappreciated, natural process for in situ degradation of antibiotics. With the easy migration of the goethite-MR-1 complex to the anaerobic/aerobic interface, the environmental fates of ENR and other antibiotics need to be seriously reconsidered.
Department环境化学与生态毒理学国家重点实验室
DOI10.1021/acs.est.6b03054
Indexed BySCI
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Document Type期刊论文
Identifierhttp://ir.rcees.ac.cn/handle/311016/35848
Collection环境化学与生态毒理学国家重点实验室
Recommended Citation
GB/T 7714
Yan, Wei,Zhang, Jianfeng,Jing, Chuanyong. Enrofloxacin Transformation on Shewanella oneidensis MR-1 Reduced Goethite during Anaerobic-Aerobic Transition[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2016,50(20):11034-11040.
APA Yan, Wei,Zhang, Jianfeng,&Jing, Chuanyong.(2016).Enrofloxacin Transformation on Shewanella oneidensis MR-1 Reduced Goethite during Anaerobic-Aerobic Transition.ENVIRONMENTAL SCIENCE & TECHNOLOGY,50(20),11034-11040.
MLA Yan, Wei,et al."Enrofloxacin Transformation on Shewanella oneidensis MR-1 Reduced Goethite during Anaerobic-Aerobic Transition".ENVIRONMENTAL SCIENCE & TECHNOLOGY 50.20(2016):11034-11040.
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