DOI: 10.1016/j.watres.2018.06.019
Scopus记录号: 2-s2.0-85049321908
论文题名: Prediction of micropollutant abatement during homogeneous catalytic ozonation by a chemical kinetic model
作者: Guo Y. ; Wang H. ; Wang B. ; Deng S. ; Huang J. ; Yu G. ; Wang Y.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 142 起始页码: 383
结束页码: 395
语种: 英语
英文关键词: Advanced oxidation process
; Emerging contaminant
; Ozonation
; Pharmaceutical
; Water treatment
Scopus关键词: Catalysts
; Deionized water
; Drug products
; Efficiency
; Forecasting
; Kinetic parameters
; Kinetic theory
; Manganese removal (water treatment)
; Ozone
; Ozonization
; Rate constants
; Surface waters
; Transition metals
; Water treatment
; 2 ,4-dichlorophenoxyacetic acid
; Advanced Oxidation Processes
; Catalytic mechanisms
; Catalytic ozonation
; Chemical kinetic model
; Design and optimization
; Emerging contaminant
; Hydroxyl radicals
; Ozone water treatment
; 2,4 dichlorophenoxyacetic acid
; bezafibrate
; clofibric acid
; cobalt
; copper ion
; deionized water
; diclofenac
; ferric ion
; ferrous ion
; gemfibrozil
; hydroxyl radical
; ibuprofen
; manganese
; nickel
; ozone
; surface water
; titanium
; zinc ion
; catalysis
; catalyst
; chemical pollutant
; chemical reaction
; decomposition
; hydroxyl radical
; numerical model
; optimization
; ozonation
; ozone
; prediction
; reaction kinetics
; transition element
; water treatment
; Article
; catalysis
; catalyst
; chemical model
; chemical reaction kinetics
; controlled study
; decomposition
; ozonation
; prediction
; priority journal
; process design
; water pollutant
; water pollution control
; water quality
; water treatment
英文摘要: Prediction of micropollutant abatements by catalytic ozonation is critical for its process design and optimization in water treatment. In this study, a chemical kinetic model based on ozone (O3) and hydroxyl radical ([rad]OH) rate constants (kO3 and k[rad]OH) and O3 and [rad]OH exposures is proposed for the generalized prediction of micropollutant abatement by homogeneous catalytic ozonation. Several micropollutants with kO3 ranging from <0.15 to 1.0 × 106 M−1 s−1 were spiked in water matrices (deionized water and surface water) and then treated by ozonation alone and homogeneous catalytic ozonation with varying transition metals (Ti2+, Co2+, Ni2+, Zn2+, Cu2+, Mn2+, Fe2+, and Fe3+). The addition of the varying catalysts enhanced the kinetics and yield of [rad]OH formation from O3 decomposition to different extent. Consequently, for the same applied O3 doses, higher [rad]OH exposures can generally be obtained at the expense of lower O3 exposures during catalytic ozonation with the varying catalysts compared to ozonation alone. The changes in O3 and [rad]OH exposures did not considerably influence the abatement of micropollutants with high and moderate O3 reactivities (diclofenac, gemfibrozil, and bezafibrate), whose abatement efficiencies were generally >90% during both ozonation alone and catalytic ozonation with the varying catalysts. In contrast, ozone-resistant micropollutants (2,4-dichlorophenoxyacetic acid, clofibric acid, and ibuprofen) were less effectively abated during ozonation (∼40–60% abatement), and the addition of the varying catalysts could enhance their absolute abatement efficiencies to various extent (∼0–10% in the deionized water and ∼0–22% in the surface water) during catalytic ozonation. Despite the differing catalytic mechanisms of the varying transition metals, the abatement efficiencies of micropollutants by catalytic ozonation could be satisfactorily predicted by the chemical kinetic model using the O3 and [rad]OH rate constants of the micropollutants reported in literature and the O3 and [rad]OH exposures determined during the treatment processes. These results demonstrate that the chemical kinetic model can provide a useful tool for the generalized prediction of micropollutant abatement by homogeneous catalytic ozonation. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112602
Appears in Collections: 气候减缓与适应
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作者单位: School of Environment, Beijing Key Laboratory for Emerging Organic Contaminants Control, State Key Joint Laboratory of Environmental Simulation and Pollution Control, Tsinghua University, Beijing, 100084, China
Recommended Citation:
Guo Y.,Wang H.,Wang B.,et al. Prediction of micropollutant abatement during homogeneous catalytic ozonation by a chemical kinetic model[J]. Water Research,2018-01-01,142