Volatile Organic Compounds from Logwood Combustion: Emissions and Transformation under Dark and Photochemical Aging Conditions in a Smog Chamber

Residential wood combustion (RWC) emits high amounts of volatile organic compounds (VOCs) into ambient air, leading to formation of secondary organic aerosol (SOA), and various health and climate effects. In this study, the emission factors of VOCs from a logwood-fired modern masonry heater were mea...

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Bibliographic Details
Published in:Environmental science & technology 2018-04, Vol.52 (8), p.4979-4988
Main Authors: Hartikainen, Anni, Yli-Pirilä, Pasi, Tiitta, Petri, Leskinen, Ari, Kortelainen, Miika, Orasche, Jürgen, Schnelle-Kreis, Jürgen, Lehtinen, Kari E. J, Zimmermann, Ralf, Jokiniemi, Jorma, Sippula, Olli
Format: Article
Language:English
Subjects:
Aerosols
Aging
Anhydrides
Aromatic compounds
Atmospheric conditions
Carbonyl compounds
Carbonyls
Climate effects
Combustion
Combustion chambers
Emission analysis
Genetic transformation
Masonry
Organic compounds
Ozone
Particulates
Phenolic compounds
Phenols
Photochemicals
Polytetrafluoroethylene
Smog
Studies
VOCs
Volatile organic compounds
Wood
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Summary:Residential wood combustion (RWC) emits high amounts of volatile organic compounds (VOCs) into ambient air, leading to formation of secondary organic aerosol (SOA), and various health and climate effects. In this study, the emission factors of VOCs from a logwood-fired modern masonry heater were measured using a Proton-Transfer-Reactor Time-of-Flight Mass Spectrometer. Next, the VOCs were aged in a 29 m3 Teflon chamber equipped with UV black lights, where dark and photochemical atmospheric conditions were simulated. The main constituents of the VOC emissions were carbonyls and aromatic compounds, which accounted for 50%–52% and 30%–46% of the detected VOC emission, respectively. Emissions were highly susceptible to different combustion conditions, which caused a 2.4-fold variation in emission factors. The overall VOC concentrations declined considerably during both dark and photochemical aging, with simultaneous increase in particulate organic aerosol mass. Especially furanoic and phenolic compounds decreased, and they are suggested to be the major precursors of RWC-originated SOA in all aging conditions. On the other hand, dark aging produced relatively high amounts of nitrogen-containing organic compounds in both gas and particulate phase, while photochemical aging increased especially the concentrations of certain gaseous carbonyls, particularly acid anhydrides.
ISSN:0013-936X
1520-5851
DOI:10.1021/acs.est.7b06269