DOI: 10.1016/j.watres.2018.11.002
Scopus记录号: 2-s2.0-85056286616
论文题名: Enhanced mineralization of atrazine by surface induced hydroxyl radicals over light-weight granular mixed-quartz sands with ozone
作者: Wang D. ; Xu H. ; Ma J. ; Giannakis S. ; Lu X. ; Chi H. ; Song S. ; Qi J.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 136
结束页码: 148
语种: 英语
英文关键词: Atrazine
; Catalytic ozonation
; Heterogeneous catalysis
; Hydroxyl radical
; Mixed quartz sand
Scopus关键词: Biological materials
; Bubble columns
; Catalysis
; Chromatography
; Degradation
; Flow of gases
; Iron compounds
; Mineralogy
; Organic carbon
; Ozone
; Ozone water treatment
; Ozonization
; Quartz
; Reaction rates
; Sand
; Silicate minerals
; Advanced Oxidation Processes
; Bubble column reactors
; Catalytic ozonation
; Dissolved organic carbon
; Hydroxyl radicals
; Natural organic matters
; Natural-water matrices
; Quartz sand
; Herbicides
; Bronsted acid
; hydroxyl radical
; Lewis acid
; natural organic matter
; organic carbon
; ozone
; river water
; silicon dioxide
; atrazine
; decomposition
; degradation
; detection method
; dissolved organic carbon
; equipment
; gas flow
; adsorption
; Article
; catalysis
; controlled study
; crystal structure
; dechlorination
; degradation
; field emission scanning electron microscopy
; Fourier transform infrared spectroscopy
; gas flow
; hydrogen bond
; mineralization
; ozonation
; particle size
; pH
; pore size distribution
; priority journal
; quantitative analysis
; rate constant
; reaction temperature
; reaction time
; ring opening
; surface area
; surface property
; temperature sensitivity
; water supply
; X ray diffraction
英文摘要: A light-weight granular mixed-quartz sand (denoted as L-GQS) combined with stirring-assisted bubble column reactor was firstly applied in catalytic ozonation of atrazine. The L-GQS, with a density of 2.36 g cm −3 and average diameter of ca. of 4 mm, was readily churned up and uniformly distributed within the solution in the reactor. The introduction of L-GQS was found to exhibit enhanced catalytic ozonation of atrazine, with the increase in degradation rate and the dissolved organic carbon (DOC) removal being more than 2-fold for the catalytic process (L-GQS dosage = 5 g L −1 , [atrazine] 0 = 50 μM, [O 3 ] = 25 mg L −1 , gas flow = 0.2 L min −1 , at pH 7.0 and 293 K). The L-GQS settled at the bottom of the reactor after experimentation, allowing its easy separation from the solution. A complete characterization of the material (XRD, XPS, FTIR, FE-SEM/EDS, BET and pH pzc ) revealed that L-GQS consisted of α-quartz, β-cristobalite, anorthoclase and small amount of iron oxy-hydroxides. Hydroxyl groups, Bronsted acid sites and Lewis acid sites on the surface of L-GQS all contributed to the atrazine adsorption, ozone decomposition and ·OH generation. The L-GQS catalyzed ozonation exhibited superior atrazine degradation and mineralization rates in a wide range of pH (3.0–9.0) and reaction temperatures (278 K–293 K). Also, an enhancement of DOC abatement was observed both in presence of natural organic matter isolates and natural water matrices (river water) when L-GQS was used. Finally, the degradation mechanism was proposed, based on the intermediates and by-products formation analyzed by LC-QTOF-MS/MS and ionic chromatography. Our results indicate that the L-GQS combined with stirring-assisted bubble column reactor could be utilized as an enhancement of ozone-based advanced oxidation processes. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122164
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, China; School of Basic Sciences (SB), Institute of Chemical Science and Engineering (ISIC), Group of Advanced Oxidation Processes (GPAO), École polytechnique fédérale de Lausanne (EPFL), Station 6, Lausanne, CH-1015, Switzerland; College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
Recommended Citation:
Wang D.,Xu H.,Ma J.,et al. Enhanced mineralization of atrazine by surface induced hydroxyl radicals over light-weight granular mixed-quartz sands with ozone[J]. Water Research,2019-01-01