Enhanced catalytic degradation of ciprofloxacin with FeS2/SiO2 microspheres as heterogeneous Fenton catalyst: Kinetics, reaction pathways and mechanism
Diao, ZH; Xu, XR; Jiang, D; Li, G; Liu, JJ; Kong, LJ; Zuo, LZ; xuxr@scsio.ac.cn
2017
发表期刊JOURNAL OF HAZARDOUS MATERIALS
卷号327页码:108-115
摘要In this study, the application of FeS2/SiO2 microspheres as a catalyst to activate H2O2 for the degradation of ciprofloxacin (CIP) was systematically investigated. Results demonstrated that the presence of SiO2 microspheres on the surface of FeS2 could effectively make the reaction of aqueous Fe2+ and H2O2 smoothly continuous by controlling the release of aqueous Fe2+ from FeS2. Nearly 100% of CIP was degraded after 60 min under the optimum conditions. A superior performance on the CIP degradation and high reusability of the catalyst was obtained in FeS2/SiO2 microspheres activated H2O2 system. A low concentration of ethylene diamine tetraacetie acid (EDTA) did positively affect the degradation rate of CIP. A synergetic effect between adsorption and oxidation processes contributed to the significant enhancement of CIP degradation. Seven oxidation intermediates were identified during the CIP degradation process, and the direct HO oxidation proved to be a main CIP degradation pathway. For degradation pathway of CIP, oxidation of piperazine ring would be its first step, followed by cleavage of the heterocyclic ring. Subsequently, the substitution, hydroxylation and decarboxylation processes occurred. This is the first report on the feasibility of FeS2/SiO2 microspheres activated H2O2 system for the enhanced degradation of CIP. (C) 2016 Elsevier B.V. All rights reserved.
部门归属[Diao, Zeng-Hui; Xu, Xiang-Rong; Li, Gang; Liu, Jin-Jun; Zuo, Lin-Zi] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, Guangdong Prov Key Lab Appl Marine Biol, Guangzhou 510301, Guangdong, Peoples R China; [Jiang, Dan] South China Normal Univ, Res Resources Ctr, Guangzhou 510631, Guangdong, Peoples R China; [Liu, Jin-Jun] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Kong, Ling-Jun] Guangzhou Univ, Sch Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China
关键词Fes2/sio2 H2o2 Ciprofloxacin Fenton-like Process Degradation
资助项目LMB
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/16261
专题中科院海洋生物资源可持续利用重点实验室
通讯作者xuxr@scsio.ac.cn
推荐引用方式
GB/T 7714
Diao, ZH,Xu, XR,Jiang, D,et al. Enhanced catalytic degradation of ciprofloxacin with FeS2/SiO2 microspheres as heterogeneous Fenton catalyst: Kinetics, reaction pathways and mechanism[J]. JOURNAL OF HAZARDOUS MATERIALS,2017,327:108-115.
APA Diao, ZH.,Xu, XR.,Jiang, D.,Li, G.,Liu, JJ.,...&xuxr@scsio.ac.cn.(2017).Enhanced catalytic degradation of ciprofloxacin with FeS2/SiO2 microspheres as heterogeneous Fenton catalyst: Kinetics, reaction pathways and mechanism.JOURNAL OF HAZARDOUS MATERIALS,327,108-115.
MLA Diao, ZH,et al."Enhanced catalytic degradation of ciprofloxacin with FeS2/SiO2 microspheres as heterogeneous Fenton catalyst: Kinetics, reaction pathways and mechanism".JOURNAL OF HAZARDOUS MATERIALS 327(2017):108-115.
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