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Volatile organic compounds from logwood combustion: Emissions and transformation under dark and photochemical aging conditions in a smog chamber.
Environ. Sci. Technol. 52, 4979-4988 (2018)
Publ. Version/Full Text
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DOI
PMC
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 m(3) 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.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Flight Mass-spectrometry; Proton-transfer-reaction; Residential Wood Combustion; Biomass Burning Emissions; Vapor Wall-loss; Aerosol Formation; Environmental Chamber; Fine-particle; Soa Formation; Atmospheric Degradation
ISSN (print) / ISBN
0013-936X
e-ISSN
1520-5851
Quellenangaben
Volume: 52,
Issue: 8,
Pages: 4979-4988
Publisher
ACS
Publishing Place
Washington, DC
Non-patent literature
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Reviewing status
Peer reviewed