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Enhanced photocatalytic degradation of ciprofloxacin over Bi2O3/(BiO)(2)CO3 heterojunctions: Efficiency, kinetics, pathways, mechanisms and toxicity evaluation
Chen, Meijuan1,2; Yao, Jie2; Huang, Yu2,3; Gong, Han4; Chu, Wei4
2018-02-15
Source PublicationCHEMICAL ENGINEERING JOURNAL
Volume334Issue:2018Pages:453-461
SubtypeArticle
AbstractIn this study, the degradation of antibiotic ciprofloxacin (CIP) over Bi2O3/(BiO)(2)CO3 heterojunctions under simulated solar light irradiation (SSL-Bi2O3/(BiO)(2)CO3) was examined for the first time. The results showed that the Bi2O3/(BiO)(2)CO3 heterojunctions dramatically improved CIP decay efficiency. The effect of parameters showed that the CIP decay was optimized with the Bi2O3/(BiO)(2)CO3 dosage of 0.5 g/L and a wide pH range of 4.0-8.3, based on which, a kinetic model was derived to predict the remaining CIP concentration. It was found that the presence of anions like SO42-, NO3- and HCO3- decelerated the CIP decay, while the co-existence of Cl- accelerated the CIP decay. Six degradation intermediates were identified by ultra-performance liquid chromatography coupled with mass analyzer (UPLC/MS) and ion chromatographic (IC) analysis, and the decay pathways and degradation mechanism of CIP were proposed by combining the experiment data with theoretical calculation of frontier electron densities. Hydroxyl radical's reaction, photo-hole (h(+)) oxidation and reductive defluorination were found to involve in the CIP decay. The efficient alleviation on total organic carbon (TOC) and toxicity indicated that the complete mineralization and de-toxicity are possible by this system with sufficient reaction time.
KeywordBi2o3/(Bio)(2)Co3 Ciprofloxacin Kinetics Model Degradation Mechanism Toxicity
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.cej.2017.10.064
WOS KeywordADVANCED OXIDATION PROCESSES ; VISIBLE-LIGHT ; AQUEOUS-SOLUTION ; WASTE-WATER ; TRANSFORMATION PATHWAYS ; ANTIBIOTIC NORFLOXACIN ; ACTIVATED PERSULFATE ; SURFACE WATERS ; BISPHENOL-A ; SULFAMETHOXAZOLE
Indexed BySCI
Language英语
WOS Research AreaEngineering
WOS SubjectEngineering, Environmental ; Engineering, Chemical
WOS IDWOS:000418533400044
Citation statistics
Cited Times:49[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5246
Collection粉尘与环境研究室
Affiliation1.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Shaanxi, Peoples R China
3.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710061, Shaanxi, Peoples R China
4.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon 999077, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Chen, Meijuan,Yao, Jie,Huang, Yu,et al. Enhanced photocatalytic degradation of ciprofloxacin over Bi2O3/(BiO)(2)CO3 heterojunctions: Efficiency, kinetics, pathways, mechanisms and toxicity evaluation[J]. CHEMICAL ENGINEERING JOURNAL,2018,334(2018):453-461.
APA Chen, Meijuan,Yao, Jie,Huang, Yu,Gong, Han,&Chu, Wei.(2018).Enhanced photocatalytic degradation of ciprofloxacin over Bi2O3/(BiO)(2)CO3 heterojunctions: Efficiency, kinetics, pathways, mechanisms and toxicity evaluation.CHEMICAL ENGINEERING JOURNAL,334(2018),453-461.
MLA Chen, Meijuan,et al."Enhanced photocatalytic degradation of ciprofloxacin over Bi2O3/(BiO)(2)CO3 heterojunctions: Efficiency, kinetics, pathways, mechanisms and toxicity evaluation".CHEMICAL ENGINEERING JOURNAL 334.2018(2018):453-461.
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