DOI: 10.1016/j.watres.2018.12.045
Scopus记录号: 2-s2.0-85059348390
论文题名: Disparate effects of DOM extracted from coastal seawaters and freshwaters on photodegradation of 2,4-Dihydroxybenzophenone
作者: Wang J. ; Chen J. ; Qiao X. ; Zhang Y.-N. ; Uddin M. ; Guo Z.
刊名: Water Research
ISSN: 431354
出版年: 2019
起始页码: 280
结束页码: 287
语种: 英语
英文关键词: 2,4-Dihydroxybenzophenone
; Dissolved organic matter
; Excited triplet-state dissolved organic matter
; Hydroxyl radical
; Photodegradation
; Singlet oxygen
Scopus关键词: Biogeochemistry
; Biological materials
; Dissolution
; Dissolved oxygen
; Excited states
; Light absorption
; Photobleaching
; Photodegradation
; Quantum theory
; Rate constants
; Seawater
; 2,4-Dihydroxybenzophenone
; Dissolved organic matters
; Excited triplet state
; Hydroxyl radicals
; Organic micro-pollutants
; Photodegradation kinetics
; Reactive intermediate
; Singlet oxygen
; Organic pollutants
; 2,4 dihydroxybenzophenone
; aromatic compound
; benzophenone derivative
; dissolved organic matter
; fresh water
; functional group
; hydroxyl radical
; sea water
; singlet oxygen
; unclassified drug
; antioxidant
; chemical compound
; concentration (composition)
; degradation
; dissolved organic matter
; freshwater
; hydroxyl radical
; organic pollutant
; oxygen
; photodegradation
; pollutant removal
; reaction kinetics
; reaction rate
; seawater
; Article
; bleaching
; concentration (parameter)
; controlled study
; degradation kinetics
; extraction
; light absorption
; model
; organic pollution
; photodegradation
; priority journal
; quantum yield
; steady state
; water pollution
英文摘要: Dissolved organic matter (DOM) plays an important role in degradation of organic pollutants by photochemically-produced reactive intermediates (RIs), such as excited triplet-states of DOM ( 3 DOM*), singlet oxygen ( 1 O 2 ) and hydroxyl radical (·OH). However, it is not clear whether DOM extracted from coastal seawaters (CS-DOM) and DOM derived from freshwaters (FW-DOM) exhibit similar effects on photodegradation of organic micropollutants. Herein, 2,4-dihydroxybenzophenone (BP-1) was adopted as a model compound to probe the effects of different DOM on photodegradation kinetics of organic micropollutants. Results show that the CS-DOM promotes the photodegradation of BP-1 mainly via the pathway involving 3 DOM*; while 3 DOM* 1 O 2 and ·OH are responsible for BP-1 photodegradation in the presence of the FW-DOM. Compared with the FW-DOM, the CS-DOM undergoes more photobleaching, and contains less aromatic C=C and C=O functional groups. Although 3 DOM* formation quantum yields for the CS-DOM are relatively higher than those for the FW-DOM, the CS-DOM has lower rates of light absorption, leading to lower steady-state RI concentrations for the CS-DOM. BP-1 photodegradation in the presence of the CS-DOM is faster than in the presence of the FW-DOM, due to higher second-order reaction rate constants between BP-1 and CS- 3 DOM* and fewer antioxidants contained in the CS-DOM. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122047
Appears in Collections: 气候变化事实与影响
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作者单位: Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, China; School of Environment, Northeast Normal University, Changchun, Jilin 130024, China
Recommended Citation:
Wang J.,Chen J.,Qiao X.,et al. Disparate effects of DOM extracted from coastal seawaters and freshwaters on photodegradation of 2,4-Dihydroxybenzophenone[J]. Water Research,2019-01-01