中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 深海科学与工程研究所
  3. 中国科学院深海科学与工程研究所
  4. 深海工程技术部
  5. 深海资源开发研究室
Insights into the degradation mechanisms and pathways of cephalexin during homogeneous and heterogeneous photo-Fenton processes

文献类型：期刊论文

作者Gou, Yejing1,2; Peng, Lai2,3; Xu, Haixing1; Li, Shengjun3; Liu, Chang3; Wu, Xiaoyong2,3; Song, Shaoxian2,3; Yang, Chenguang4; Song, Kang5; Xu, Yifeng2,3
刊名CHEMOSPHERE
出版日期2021-12-01
卷号285页码:9
关键词Antibiotics Photo-Fenton processes Degradation products and pathways Heterogeneous catalyst Active species
ISSN号0045-6535
DOI10.1016/j.chemosphere.2021.131417
英文摘要The widespread occurrence of antibiotics in the environment poses a potential threat to human health. The photo-Fenton process has demonstrated better degradation performance compared with the conventional wastewater treatment processes. In this study, the degradation of cephalexin was evaluated comparatively by homogeneous (Fe2+/H2O2/UV) and heterogeneous (MoS2@Fe/H2O2/UV) photo-Fenton processes. Key influencing factors affecting photo-Fenton performance were assessed, confirming the optimum Fe2+ concentration at 0.2016 mg L-1 and H2O2/Fe2+ molar ratio at 6. Higher degradation efficiency (73.10%) and pseudo-first-order degradation rate constant (0.0078 min(-1)) were achieved with the assistance of MoS2@Fe as the heterogeneous catalyst. Completely different degradation products were identified in the homogeneous and heterogeneous photo-Fenton processes, with main degradation pathways proposed as beta-lactam ring-opening, sulfoxide formation, demethylation, N-dealkylation, decarbonylation, hydroxylation and deamination in the Fe2+/H2O2/UV system and beta-lactam ring-opening, hydroxylation, dehydration, amide hydrolysis, and demethylation and ring contraction in the MoS2@Fe/H2O2/UV system, respectively. The formation of newly identified products might root in the attack on cephalexin from active species (i.e., (OH)-O-center dot, h(+), e(-), O-center dot(2)- ) photoinduced by the MoS2@Fe catalyst. Results also indicated the importance of understanding the underlying mechanisms and pathways to eliminate the antimicrobial activities of antibiotics in the future.
WOS关键词WASTE-WATER TREATMENT ; AQUEOUS-SOLUTION ; ORGANIC POLLUTANTS ; ANTIBIOTICS ; REMOVAL ; OXIDATION ; PHOTOCATALYSIS ; PRODUCTS ; PHARMACEUTICALS ; IDENTIFICATION
资助项目Natural Science Foundation of Hubei Province[2020CFB517] ; Natural Science Foundation of GuangdongProvince[2019A1515110350] ; National Natural Science Foun-dation of China[51908436] ; Fundamental Research Funds for the Central Universities[WUT: 193108001] ; Fundamental Research Funds for the Central Universities[203208003] ; Hubei Key Laboratory of Mineral Resources Processing and Environment (Wuhan University of Technology)[ZHJJ202006]
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000703697700004
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构Natural Science Foundation of Hubei Province ; Natural Science Foundation of GuangdongProvince ; National Natural Science Foun-dation of China ; Fundamental Research Funds for the Central Universities ; Hubei Key Laboratory of Mineral Resources Processing and Environment (Wuhan University of Technology)
源URL[http://ir.idsse.ac.cn/handle/183446/8853]  
专题深海工程技术部_深海资源开发研究室
通讯作者Xu, Haixing; Xu, Yifeng
作者单位1.Wuhan Univ Technol, Sch Chem Chem Engn & Life Sci, Luoshi Rd 122, Wuhan 430070, Hubei, Peoples R China
2.Wuhan Univ Technol, Hubei Key Lab Mineral Resources Proc & Environm, Luoshi Rd 122, Wuhan 430070, Hubei, Peoples R China
3.Wuhan Univ Technol, Sch Resources & Environm Engn, Luoshi Rd 122, Wuhan 430070, Hubei, Peoples R China
4.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Hainan, Peoples R China
5.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Hubei, Peoples R China
推荐引用方式
GB/T 7714		 Gou, Yejing,Peng, Lai,Xu, Haixing,et al. Insights into the degradation mechanisms and pathways of cephalexin during homogeneous and heterogeneous photo-Fenton processes[J]. CHEMOSPHERE,2021,285:9.
APA Gou, Yejing.,Peng, Lai.,Xu, Haixing.,Li, Shengjun.,Liu, Chang.,...&Xu, Yifeng.(2021).Insights into the degradation mechanisms and pathways of cephalexin during homogeneous and heterogeneous photo-Fenton processes.CHEMOSPHERE,285,9.
MLA Gou, Yejing,et al."Insights into the degradation mechanisms and pathways of cephalexin during homogeneous and heterogeneous photo-Fenton processes".CHEMOSPHERE 285(2021):9.

入库方式： OAI收割

来源：深海科学与工程研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。