DOI: 10.1016/j.watres.2018.05.023
Scopus记录号: 2-s2.0-85048573697
论文题名: Exposure of Microcystis aeruginosa to hydrogen peroxide and titanium dioxide under visible light conditions: Modeling the impact of hydrogen peroxide and hydroxyl radical on cell rupture and microcystin degradation
作者: Chang C.-W. ; Huo X. ; Lin T.-F.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 141 起始页码: 217
结束页码: 226
语种: 英语
英文关键词: Dual-oxidant kinetic model
; Hydrogen peroxide
; Microcystins
; Microcystis
; Titanium dioxide
; Visible light
Scopus关键词: Cytology
; Hydrogen peroxide
; Kinetics
; Light
; Oxidants
; Oxidation
; Peroxides
; Rate constants
; Titanium dioxide
; Toxic materials
; Additional experiments
; Kinetic modeling
; Kinetic rate constants
; Microcystin degradation
; Microcystins
; Microcystis
; Microcystis aeruginosa
; Visible light
; Cells
; hydrogen peroxide
; hydroxyl radical
; microcystin
; oxidizing agent
; titanium dioxide
; hydrogen peroxide
; hydroxyl radical
; microcystin
; oxidizing agent
; titanium
; titanium dioxide
; biodegradation
; cell
; cyanobacterium
; experimental study
; hydrogen peroxide
; hydroxyl radical
; pollution exposure
; reaction kinetics
; titanium
; visible spectrum
; Article
; cell death
; cell kinetics
; controlled study
; degradation
; light
; Microcystis aeruginosa
; nonhuman
; oxidation
; photocatalysis
; priority journal
; simulation
; drug effect
; kinetics
; light
; metabolism
; Microcystis
; theoretical model
; water pollutant
; Cyanobacteria
; Microcystis
; Microcystis aeruginosa
; Hydrogen Peroxide
; Hydroxyl Radical
; Kinetics
; Light
; Microcystins
; Microcystis
; Models, Theoretical
; Oxidants
; Titanium
; Water Pollutants
英文摘要: The aims of this study are to evaluate, under visible light conditions, the ability of H2O2 and TiO2 to produce [rad]OH, their quantitative impacts on the cell integrity of Microcystis, and the subsequent release and degradation of microcystins (MCs). A sequential reaction model was developed, including one sub-model to simulate the rupture kinetics for cell integrity of Microcystis, and another to describe the release and degradation of MCs. For cell rupture, the dual-oxidant Delayed Chick-Watson model (DCWM) and dual-oxidant Hom model (HM) were first proposed and developed, giving excellent simulation results of cell rupture kinetics. Kinetic rate constants between Microcystis cells and H2O2 (kH2O2, Cell) as well as [rad]OH (k•OH, Cell) under visible light successfully separated the individual effects of H2O2 and [rad]OH on Microcystis. The dual-oxidant models were further validated with additional experiments, making the models more convincing. Finally, the dual-oxidant cell rupture models were integrated with the MC degradation model and well predicted the observed MCs concentrations in the experimental systems. The results of this study not only demonstrate the potential application of H2O2 and TiO2 for the control of cyanobacteria and metabolites in natural water bodies, but also provide a new methodology to differentiate the individual contributions of the two oxidants, H2O2 and [rad]OH, on cell rupture, thus giving a novel way to more precisely determine the effective doses of applied oxidants for cyanobacteria control. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112673
Appears in Collections: 气候减缓与适应
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作者单位: Department of Environmental Engineering and Global Water Quality Research Center, National Cheng Kung University, Tainan City, 70101, Taiwan; Department of Civil and Environmental Engineering, Colorado School of Mines, Golden, CO 80401, United States
Recommended Citation:
Chang C.-W.,Huo X.,Lin T.-F.. Exposure of Microcystis aeruginosa to hydrogen peroxide and titanium dioxide under visible light conditions: Modeling the impact of hydrogen peroxide and hydroxyl radical on cell rupture and microcystin degradation[J]. Water Research,2018-01-01,141