DOI: 10.1016/j.watres.2018.08.052
Scopus记录号: 2-s2.0-85053034787
论文题名: Removal of trace organic chemicals in wastewater effluent by UV/H2O2 and UV/PDS
作者: Nihemaiti M. ; Miklos D.B. ; Hübner U. ; Linden K.G. ; Drewes J.E. ; Croué J.-P.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 145 起始页码: 487
结束页码: 497
语种: 英语
英文关键词: Hydroxyl radical
; Kinetics
; Sulfate radical
; Trace organic chemicals
; UV-based advanced oxidation process
; Wastewater treatment
Scopus关键词: Enzyme kinetics
; Fluorophores
; Industrial chemicals
; Organic chemicals
; Rate constants
; Sulfur compounds
; Wastewater treatment
; Advanced Oxidation Processes
; Effluent organic matter
; Fluence-based rate constant
; Hydroxyl radicals
; Second-order rate constants
; Soluble microbial products
; Sulfate radicals
; Trace organic chemicals
; Effluents
; chemical reaction
; concentration (composition)
; degradation
; effluent
; experimental study
; hydrogen peroxide
; hydroxyl radical
; organic compound
; organic matter
; oxidation
; protein
; reaction kinetics
; sulfate
; ultraviolet radiation
; wastewater
; wastewater treatment
英文摘要: In this study, we comparatively investigated the degradation of 12 trace organic chemicals (TOrCs) during UV/H2O2 and UV/peroxydisulfate (PDS) processes. Second-order rate constants for the reactions of iopromide, phenytoin, caffeine, benzotriazole, and primidone with sulfate radical (SO4 •−) were determined for the first time. Experiments were conducted in buffered pure water and wastewater effluent with spiked TOrCs. UV/PDS degraded all TOrCs more efficiently than UV/H2O2 in buffered pure water due to the higher yield of SO4 •− than that of hydroxyl radical (•OH) at the same initial molar dose of PDS and H2O2, respectively. UV/PDS showed higher selectivity toward TOrCs removal than UV/H2O2 in wastewater effluent. Compounds with electron-rich moieties, such as diclofenac, venlafaxine, and metoprolol, were eliminated faster in UV/PDS whereas UV/H2O2 was more efficient in degrading compounds with lower reactivity to SO4 •−. The fluence-based rate constants (kobs−UV/H2O2) of TOrCs in wastewater effluent linearly increased as a function of initial H2O2 dose during UV/H2O2, possibly due to the constant scavenging impact of the wastewater matrix on •OH. However, exponential increase of kobs−UV/PDS with increasing PDS dose was observed for most compounds during UV/PDS, suggesting the decreasing scavenging effect of the water matrix (electron-rich site of effluent organic matter (EfOM)) after initial depletion of SO4 •− at low PDS dose. Fulvic and humic-like fluorophores appeared to be more persistent during UV/H2O2 compared to aromatic protein and soluble microbial product-like fluorophores. In contrast, UV/PDS efficiently degraded all identified fluorophores and showed less selectivity toward the fluorescent EfOM components. Removal pattern of TOrCs during pilot-scale UV/PDS was consistent with lab-scale experiments, however, overall removal rates were lower due to the presence of higher concentration of EfOM and nitrite. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112458
Appears in Collections: 气候减缓与适应
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作者单位: Curtin Water Quality Research Centre, Department of Chemistry, Curtin University, Perth, Australia; Chair of Urban Water Systems Engineering, Technical University of Munich, Munich, Germany; Department of Civil, Environmental, and Architectural Engineering, University of Colorado Boulder, United States
Recommended Citation:
Nihemaiti M.,Miklos D.B.,Hübner U.,et al. Removal of trace organic chemicals in wastewater effluent by UV/H2O2 and UV/PDS[J]. Water Research,2018-01-01,145