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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
发表期刊CHEMICAL ENGINEERING JOURNAL
卷号334期号:2018页码:453-461
文章类型Article
摘要In 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.
关键词Bi2o3/(Bio)(2)Co3 Ciprofloxacin Kinetics Model Degradation Mechanism Toxicity
WOS标题词Science & Technology ; Technology
DOI10.1016/j.cej.2017.10.064
关键词[WOS]ADVANCED OXIDATION PROCESSES ; VISIBLE-LIGHT ; AQUEOUS-SOLUTION ; WASTE-WATER ; TRANSFORMATION PATHWAYS ; ANTIBIOTIC NORFLOXACIN ; ACTIVATED PERSULFATE ; SURFACE WATERS ; BISPHENOL-A ; SULFAMETHOXAZOLE
收录类别SCI
语种英语
WOS研究方向Engineering
WOS类目Engineering, Environmental ; Engineering, Chemical
WOS记录号WOS:000418533400044
引用统计
被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5246
专题粉尘与环境研究室
作者单位1.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
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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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