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title Hydrocarbons in particulate samples from wildfire events in central Portugal in summer 2010
authors Vicente, A; Calvo, A; Fernandes, AP; Nunes, T; Monteiro, C; Pio, C; Alves, C
author full name Vicente, Ana; Calvo, Ana; Fernandes, Ana P.; Nunes, Teresa; Monteiro, Cristina; Pio, Casimiro; Alves, Celia
title Hydrocarbons in particulate samples from wildfire events in central Portugal in summer 2010
nationality internacional
language English
document type Article
author keywords Wildfires; Organic carbon; Organic compounds; Biomarkers; Particulate matter; Portugal
abstract In summer 2010, twenty eight (14 PM2.5 samples plus 14 samples PM2.5-10) smoke samples were collected during wildfires that occurred in central Portugal. A portable high-volume sampler was used to perform the sampling, on quartz fibre filters of coarse (PM2.5-10) and fine (PM2.5) smoke samples. The carbonaceous content (elemental and organic carbon) of particulate matter was analysed by a thermal-optical technique. Subsequently, the particulate samples were solvent extracted and fractionated by vacuum flash chromatography into three different classes of organic compounds (aliphatics, polycyclic aromatic hydrocarbons (PAHs) and carbonyl compounds). The organic speciation was performed by gas chromatography-mass spectrometry (GC-MS). Emissions were dominated by the fine particles, which represented around 92% of the PM10. A clear predominance of carbonaceous constituents was observed, with organic to elemental carbon (OC/EC) ratios ranging between 1.69 and 245 in both size fractions. The isoprenoid ketone 6,10,14-trimethyl-2-pentadecanone, a tracer for secondary organic aerosol formation, was one of the dominant constituents in both fine and coarse particles. Retene was the most abundant compound in all samples. Good correlations were obtained between OC and both aliphatic and PAH compounds. Pyrogenic processes, thermal release of biogenic compounds and secondary processing accounted for 97% of the apportioned PM2.5 levels. (C) 2016 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
author address [Vicente, Ana; Fernandes, Ana P.; Nunes, Teresa; Monteiro, Cristina; Pio, Casimiro; Alves, Celia] Univ Aveiro, Dept Environm, Ctr Environm & Marine Studies CESAM, P-3810193 Aveiro, Portugal; [Calvo, Ana] Univ Leon, Dept Phys, IMARENAB, E-24071 Leon, Spain
reprint address Vicente, A (reprint author), Univ Aveiro, Dept Environm, Ctr Environm & Marine Studies CESAM, P-3810193 Aveiro, Portugal.
e-mail address anavicente@ua.pt
funding agency and grant number Portuguese Science Foundation (FCT) [PTDC/AMB/65706/2006 (BIOEMI)]; FCT [PTDC/AAC-AMB/117956/2010, SFRH/BPD/64810/2009]; [SFRH/BD/48535/2008]
funding text The sampling campaigns were carried out within the project
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cited reference count 48
publisher city BEIJING
issn 1001-0742
29-character source abbreviation J ENVIRON SCI-CHINA
iso source abbreviation J. Environ. Sci.
publication date MAR 1
year published 2017
volume 53
beginning page 122
ending page 131
digital object identifier (doi) 10.1016/j.jes.2016.02.022
page count 10
web of science category Environmental Sciences
subject category Environmental Sciences & Ecology
document delivery number ES1ZV
unique article identifier WOS:000399326400014
link http://dx.doi.org/10.1016/j.jes.2016.02.022