DOI: 10.1016/j.watres.2018.01.016
Scopus记录号: 2-s2.0-85042773054
论文题名: Enhanced photocatalytic degradation of sulfamethoxazole by zinc oxide photocatalyst in the presence of fluoride ions: Optimization of parameters and toxicological evaluation
作者: Mirzaei A. ; Yerushalmi L. ; Chen Z. ; Haghighat F. ; Guo J.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 132 起始页码: 241
结束页码: 251
语种: 英语
英文关键词: Photocorrosion
; Response surface methodology
; Stability
; Sulfamethoxazole
; Surface fluorination
; Toxicity
Scopus关键词: Association reactions
; Convergence of numerical methods
; Energy efficiency
; Energy utilization
; Escherichia coli
; Fluorination
; Fluorine
; Fluorine compounds
; Halogenation
; Ions
; Irradiation
; Kinetics
; Photocatalysts
; Photodegradation
; Rate constants
; Reaction kinetics
; Surface properties
; Titanium dioxide
; Toxicity
; Zinc oxide
; Electrical energy efficiency
; Electrical energy per order
; Optimum operating conditions
; Photocorrosion
; Pseudo first-order kinetics
; Response surface methodology
; Sulfamethoxazole
; Surface fluorination
; II-VI semiconductors
; fluoride ion
; sulfamethoxazole
; titanium dioxide
; zinc ion
; zinc oxide
; antibiotics
; catalysis
; chemical oxygen demand
; concentration (composition)
; electrical power
; energy efficiency
; experimental study
; inorganic compound
; ion
; optimization
; photodegradation
; photolysis
; pollutant removal
; reaction kinetics
; reduction
; response surface methodology
; stabilization
; toxicity
; toxicology
; agar diffusion
; Article
; catalyst
; chemical oxygen demand
; chemical reaction kinetics
; controlled study
; electron transport
; energy consumption
; Escherichia coli
; fluorination
; mineralization
; nonhuman
; pH
; photocatalysis
; photodegradation
; photolysis
; photosensitization
; priority journal
; process optimization
; response surface method
; toxicity assay
; toxicity testing
; toxicology
; zone of inhibition
英文摘要: The presence of antibiotics in water bodies has received increasing attention since they are continuously introduced and detected in the environment and may cause unpredictable environmental hazards and risks. The photocatalytic degradation of sulfamethoxazole (SMX) by ZnO in the presence of fluoride ions (F-ZnO) was evaluated. The effects of operating parameters on the efficiency of SMX removal were investigated by using response surface methodology (RSM). Under the optimum condition, i.e. photocatalyst dosage = 1.48 g/L, pH 4.7, airflow rate = 2.5 L/min and the concentration of fluoride ions = 2.505 mM, about 97% SMX removal was achieved by F-ZnO after 30 min of reaction. The mechanism of reactions, COD removal efficiency and reaction kinetics were also investigated under optimum operating conditions. In addition, about 85% COD reduction was obtained after 90 min photocatalytic reaction. The pseudo-first-order kinetics rate constants for the photodegradation of SMX were found to be 0.099, 0.058 and 0.048 min−1 by F-ZnO, ZnO and TiO2 (P25), respectively. The figure-of-merit electrical energy per order (EEO) was used for estimating the electrical energy efficiency, which was shown to be considerably lower than the energy consumption for the reported research on removal of SMX by photocatalytic degradation under UV irradiation. Toxicity assays were conducted by measuring the inhibition percentage (PI) towards E. coli bacteria strain and by agar well diffusion method. The results showed that after 30 min of reaction, the toxicity of the treated solutions by all photocatalysts fell within the non-toxic range; however, the reduction in toxicity by F-ZnO was faster than those by ZnO and P25. Despite the positive effects of surface fluorination of ZnO on the SMX and COD removal and reaction kinetics, its lower stability compared to ZnO and P25 in the repeated experiments gave rise to some doubts about its performance from a practical point of view. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112983
Appears in Collections: 气候减缓与适应
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作者单位: Department of Building, Civil and Environmental Engineering (BCEE), Faculty of Engineering & Computer Sciences, Concordia University, Montreal, Quebec, Canada; Tianjin Chengjian University, 26 Jinjing Road, Xiqing District, Tianjin, 300384, China
Recommended Citation:
Mirzaei A.,Yerushalmi L.,Chen Z.,et al. Enhanced photocatalytic degradation of sulfamethoxazole by zinc oxide photocatalyst in the presence of fluoride ions: Optimization of parameters and toxicological evaluation[J]. Water Research,2018-01-01,132