DOI: 10.1016/j.watres.2017.10.064
Scopus记录号: 2-s2.0-85033402638
论文题名: Simulation of photoreactive transients and of photochemical transformation of organic pollutants in sunlit boreal lakes across 14 degrees of latitude: A photochemical mapping of Sweden
作者: Koehler B. ; Barsotti F. ; Minella M. ; Landelius T. ; Minero C. ; Tranvik L.J. ; Vione D.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 129 起始页码: 94
结束页码: 104
语种: 英语
英文关键词: Boreal lakes
; Browning
; Modeling
; Photochemical transients
; Photochemistry
; Pollutants
Scopus关键词: Air pollution
; Biological materials
; Free radical reactions
; Functional polymers
; Lakes
; Models
; Organic pollutants
; Photochemical reactions
; Photoreactivity
; Water treatment
; Boreal lakes
; Browning
; Carbonate radical anion
; Chromophoric dissolved organic matter
; Photochemical pathways
; Photochemical transformations
; Pollutants
; Steady state concentration
; Lake pollution
; carbamazepine
; dimethomorph
; dissolved organic matter
; ethylhexyl methoxycinnamate
; hydroxyl group
; lake water
; nicotine
; paracetamol
; phenol derivative
; singlet oxygen
; unclassified drug
; carbonic acid
; hydroxyl radical
; organic compound
; carbonate
; chemical reaction
; concentration (composition)
; dissolved organic matter
; hydroxyl radical
; lake water
; latitude
; mapping
; modeling
; nitrate
; organic pollutant
; oxygen
; photochemistry
; photodegradation
; simulation
; transformation
; absorption
; Article
; geography
; lake
; latitude
; oxidation
; photochemistry
; photodegradation
; photolysis
; photoreactivity
; pollutant
; priority journal
; quantum yield
; radiation absorption
; simulation
; Sweden
; chemical model
; chemistry
; eutrophication
; kinetics
; photochemistry
; photolysis
; sunlight
; validation study
; water pollutant
; Sweden
; Carbonates
; Eutrophication
; Hydroxyl Radical
; Kinetics
; Lakes
; Models, Chemical
; Organic Chemicals
; Photochemical Processes
; Photolysis
; Singlet Oxygen
; Sunlight
; Sweden
; Water Pollutants, Chemical
英文摘要: Lake water constituents, such as chromophoric dissolved organic matter (CDOM) and nitrate, absorb sunlight which induces an array of photochemical reactions. Although these reactions are a substantial driver of pollutant degradation in lakes they are insufficiently understood, in particular on large scales. Here, we provide for the first time comprehensive photochemical maps covering a large geographic region. Using photochemical kinetics modeling for 1048 lakes across Sweden we simulated the steady-state concentrations of four photoreactive transient species, which are continuously produced and consumed in sunlit lake waters. We then simulated the transient-induced photochemical transformation of organic pollutants, to gain insight into the relevance of the different photoreaction pathways. We found that boreal lakes were often unfavorable environments for photoreactions mediated by hydroxyl radicals ([rad]OH) and carbonate radical anions (CO3 −[rad]), while photoreactions mediated by CDOM triplet states (3CDOM*) and, to a lesser extent, singlet oxygen (1O2) were the most prevalent. These conditions promote the photodegradation of phenols, which are used as plastic, medical drug and herbicide precursors. When CDOM concentrations increase, as is currently commonly the case in boreal areas such as Sweden, 3CDOM* will also increase, promoting its importance in photochemical pathways even more. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113094
Appears in Collections: 气候减缓与适应
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作者单位: Department of Ecology and Genetics/Limnology, Evolutionary Biology Centre, Uppsala University, Norbyvägen 18 D, Uppsala, 75236, Sweden; Department of Chemistry, University of Torino, Via Pietro Giuria 5, Torino, 10125, Italy; Swedish Meteorological and Hydrological Institute, Atmospheric Remote Sensing, Folkborgsvägen 1, Norrköping, 60176, Sweden
Recommended Citation:
Koehler B.,Barsotti F.,Minella M.,et al. Simulation of photoreactive transients and of photochemical transformation of organic pollutants in sunlit boreal lakes across 14 degrees of latitude: A photochemical mapping of Sweden[J]. Water Research,2018-01-01,129