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Particle Phase Acidity and Oligomer Formation in Secondary Organic Aerosol

Gao, Song and Ng, Nga L. and Keywood, Melita and Varutbangkul, Varuntida and Bahreini, Roya and Nenes, Athanasios and He, Jiwen and Yoo, Kee Y. and Beauchamp, J. L. and Hodyss, Robert P. and Flagan, Richard C. and Seinfeld, John H. (2004) Particle Phase Acidity and Oligomer Formation in Secondary Organic Aerosol. Environmental Science and Technology, 38 (24). pp. 6582-6589. ISSN 0013-936X. doi:10.1021/es049125k.

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A series of controlled laboratory experiments are carried out in dual Teflon chambers to examine the presence of oligomers in secondary organic aerosols (SOA) from hydrocarbon ozonolysis as well as to explore the effect of particle phase acidity on SOA formation. In all seven hydrocarbon systems studied (i.e., α-pinene, cyclohexene, 1-methyl cyclopentene, cycloheptene, 1-methyl cyclohexene, cyclooctene, and terpinolene), oligomers with MW from 250 to 1600 are present in the SOA formed, both in the absence and presence of seed particles and regardless of the seed particle acidity. These oligomers are comparable to, and in some cases, exceed the low molecular weight species (MW < 250) in ion intensities in the ion trap mass spectra, suggesting they may comprise a substantial fraction of the total aerosol mass. It is possible that oligomers are widely present in atmospheric organic aerosols, formed through acid- or base-catalyzed heterogeneous reactions. In addition, as the seed particle acidity increases, larger oligomers are formed more abundantly in the SOA; consequently, the overall SOA yield also increases. This explicit effect of particle phase acidity on the composition and yield of SOA may have important climatic consequences and need to be considered in relevant models.

Item Type:Article
Related URLs:
URLURL TypeDescription Information
Gao, Song0000-0001-7427-6681
Ng, Nga L.0000-0001-8460-4765
Nenes, Athanasios0000-0003-3873-9970
Beauchamp, J. L.0000-0001-8839-4822
Hodyss, Robert P.0000-0002-6523-3660
Flagan, Richard C.0000-0001-5690-770X
Seinfeld, John H.0000-0003-1344-4068
Additional Information:© 2004 American Chemical Society. Received for review June 10, 2004. Revised manuscript received September 22, 2004. Accepted September 24, 2004. This work was supported by U.S. Department of Energy Biological and Environmental Research Program DE-FG03-01ER63099, Electric Power Research Institute, and U.S. Environmental Protection Agency RD-83107501-0.
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG03-01ER63099
Electric Power Research Institute (EPRI)UNSPECIFIED
Environmental Protection Agency (EPA)RD-83107501-0
Issue or Number:24
Record Number:CaltechAUTHORS:20150818-102702345
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Official Citation:Particle Phase Acidity and Oligomer Formation in Secondary Organic Aerosol Song Gao, Nga L. Ng, Melita Keywood, Varuntida Varutbangkul, Roya Bahreini, Athanasios Nenes, Jiwen He, Kee Y. Yoo, J. L. Beauchamp, Robert P. Hodyss, Richard C. Flagan, and John H. Seinfeld Environmental Science & Technology 2004 38 (24), 6582-6589 DOI: 10.1021/es049125k
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59708
Deposited By: Irina Meininger
Deposited On:19 Aug 2015 23:55
Last Modified:10 Nov 2021 22:24

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