DOI: 10.1016/j.atmosenv.2013.11.007
Scopus记录号: 2-s2.0-84888808467
论文题名: Diurnal and nocturnal measurements of PAH, nitro-PAH, and oxy-PAH compounds in atmospheric particulate matter of a sugar cane burning region
作者: Souza K ; F ; , Carvalho L ; R ; F ; , Allen A ; G ; , Cardoso A ; A
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 83 起始页码: 193
结束页码: 201
语种: 英语
英文关键词: Atmospheric particulate matter
; Brazil
; Nitro- and oxy-PAHs
; PAHs
; Sugar cane burning
Scopus关键词: Ketones
; Photolysis
; Sugar cane
; 9 ,10-anthraquinone
; Atmospheric particulate matter
; Average concentration
; Brazil
; Nitro- and oxy-PAHs
; PAHs
; Photochemical production
; Polycyclic aromatic hydrocarbons (PAHS)
; Polycyclic aromatic hydrocarbons
; 9 fluorenone
; 9 nitrophenanthrene
; anthraquinone
; benzanthrone
; benzo[b]fluoranthene
; nitropolycyclic aromatic hydrocarbon
; oxy polycyclic aromatic hydrocarbon
; polycyclic aromatic hydrocarbon
; polycyclic aromatic hydrocarbon derivative
; unclassified drug
; biomass burning
; correlation
; PAH
; particulate matter
; photolysis
; sugar cane
; article
; atmospheric dispersion
; Brazil
; concentration (parameters)
; correlation analysis
; fire and fire related phenomena
; night
; particulate matter
; priority journal
; rural area
; sugar cane burning
; sugarcane
; Brazil
; Sao Paulo [Brazil]
; Saccharum
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Polycyclic aromatic hydrocarbons (PAHs), nitro-PAHs, and oxy-PAHs were studied in the atmospheric particulate matter of a subtropical rural region (São Paulo State, Brazil) affected by emissions from sugar cane burning. Diurnal and nocturnal samples were collected from May to June of 2010. In general, average PAH concentrations were significantly higher at night, suggesting that the compounds were predominantly emitted to the atmosphere during biomass burning (which was mainly performed at night). The maximum average PAH concentration was found for benzo[b]fluoranthene at night (2.9±5.4ngm-3). Among the nitro-PAH compounds, the highest average concentrations were obtained for 9-nitrophenanthrene in diurnal and nocturnal samples (1.5±1.2 and 1.3±2.1ngm-3, respectively). In contrast to the PAH and nitro-PAH compounds, the oxy-PAHs could not be directly associated with sugar cane burning. The most abundant oxy-PAH compound was benzanthrone (1.6±1.3ngm-3) at night, followed by 9,10-anthraquinone (1.1±0.9ngm-3) and 9-fluorenone (0.4±0.1ngm-3) during the day.A correlation matrix was used to explore the origins of the different compounds. The data suggested that during the daytime, direct emissions (mainly in vehicle exhaust) contributed to the presence of PAHs, nitro-PAHs, and oxy-PAHs in air. Photochemical production also appeared to be a source of the majority of nitro-PAHs and oxy-PAHs, while photolysis could have contributed to removal of the nitro-PAHs during the daytime. At night, sugar cane burning emissions were the primary source of the PAHs and nitro-PAHs, with additional sources also contributing to the levels of oxy-PAHs in the atmosphere. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81107
Appears in Collections: 气候变化事实与影响
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作者单位: Chemistry Institute, University of São Paulo, Av. Prof. Lineu Prestes 748, 05508-900 São Paulo, Brazil; Chemistry Institute, São Paulo State University, Av. Prof. Francisco Degni 55, 14800-900 Araraquara, Brazil
Recommended Citation:
Souza K,F,, Carvalho L,et al. Diurnal and nocturnal measurements of PAH, nitro-PAH, and oxy-PAH compounds in atmospheric particulate matter of a sugar cane burning region[J]. Atmospheric Environment,2014-01-01,83