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Oxygenated Aromatic Compounds are Important Precursors of Secondary Organic Aerosol in Biomass Burning Emissions

Akherati, Ali and He, Yicong and Coggon, Matthew M. and Koss, Abigail R. and Hodshire, Anna L. and Sekimoto, Kanako and Warneke, Carsten and de Gouw, Joost and Yee, Lindsay and Seinfeld, John H. and Onasch, Timothy B. and Herndon, Scott C. and Knighton, Walter B. and Cappa, Christopher D. and Kleeman, Michael J. and Lim, Christopher Y. and Kroll, Jesse H. and Pierce, Jeffrey R. and Jathar, Shantanu H. (2020) Oxygenated Aromatic Compounds are Important Precursors of Secondary Organic Aerosol in Biomass Burning Emissions. Environmental Science and Technology, 54 (14). pp. 8568-8579. ISSN 0013-936X. doi:10.1021/acs.est.0c01345.

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Biomass burning is the largest combustion-related source of volatile organic compounds (VOCs) to the atmosphere. We describe the development of a state-of-the-science model to simulate the photochemical formation of secondary organic aerosol (SOA) from biomass-burning emissions observed in dry (RH <20%) environmental chamber experiments. The modeling is supported by (i) new oxidation chamber measurements, (ii) detailed concurrent measurements of SOA precursors in biomass-burning emissions, and (iii) development of SOA parameters for heterocyclic and oxygenated aromatic compounds based on historical chamber experiments. We find that oxygenated aromatic compounds, including phenols and methoxyphenols, account for slightly less than 60% of the SOA formed and help our model explain the variability in the organic aerosol mass (R² = 0.68) and O/C (R² = 0.69) enhancement ratios observed across 11 chamber experiments. Despite abundant emissions, heterocyclic compounds that included furans contribute to ∼20% of the total SOA. The use of pyrolysis-temperature-based or averaged emission profiles to represent SOA precursors, rather than those specific to each fire, provide similar results to within 20%. Our findings demonstrate the necessity of accounting for oxygenated aromatics from biomass-burning emissions and their SOA formation in chemical mechanisms.

Item Type:Article
Related URLs:
URLURL TypeDescription
Coggon, Matthew M.0000-0002-5763-1925
de Gouw, Joost0000-0002-0385-1826
Seinfeld, John H.0000-0003-1344-4068
Jathar, Shantanu H.0000-0003-4106-2358
Additional Information:© 2020 American Chemical Society. Received: March 4, 2020; Revised: June 19, 2020; Accepted: June 19, 2020; Published: June 19, 2020. This work was supported by the National Oceanic and Atmospheric Administration (NA17OAR4310003, NA17OAR4310001, NA16OAR4310112, and NA16OAR4310111), Colorado Energy Research Collaboratory (37-2018), the Environmental Protection Agency (RD839278), and the National Science Foundation (AGS-1559607). We thank Dr. Manish Shrivastava for useful discussions and Dr. Steven Brown for reviewing this manuscript. Author Contributions: A.A., J.R.P., and S.H.J. designed the study. A.A. developed the model and analyzed the results. Y.H. helped with model inputs. M.M.C., A.R.K., K.S., C.W., and J.d.G. provided access to emission data. M.M.C. performed MCM simulations. A.L.H. modeled losses in transfer duct and sampling lines and shared field O/C data. L.Y. and J.H.S. provided access to oxygenated aromatic chamber data. T.B.O., S.C.H., and W.B.K. provided access to measurements made during FIREX. C.D.C. and M.J.K. helped with model development. C.Y.L., J.H.K., and C.D.C. provided access to minichamber data during FIREX. A.A., J.R.P., and S.H.J. wrote the paper with input from all co-authors. The authors declare no competing financial interest.
Funding AgencyGrant Number
National Oceanic and Atmospheric Administration (NOAA)NA17OAR4310003
National Oceanic and Atmospheric Administration (NOAA)NA17OAR4310001
National Oceanic and Atmospheric Administration (NOAA)NA16OAR4310112
National Oceanic and Atmospheric Administration (NOAA)NA16OAR4310111
Colorado Energy Research Collaboratory37-2018
Environmental Protection Agency (EPA)RD839278
Issue or Number:14
Record Number:CaltechAUTHORS:20200622-104138439
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Official Citation:Oxygenated Aromatic Compounds are Important Precursors of Secondary Organic Aerosol in Biomass-Burning Emissions. Ali Akherati, Yicong He, Matthew M. Coggon, Abigail R. Koss, Anna L. Hodshire, Kanako Sekimoto, Carsten Warneke, Joost de Gouw, Lindsay Yee, John H. Seinfeld, Timothy B. Onasch, Scott C. Herndon, Walter B. Knighton, Christopher D. Cappa, Michael J. Kleeman, Christopher Y. Lim, Jesse H. Kroll, Jeffrey R. Pierce, and Shantanu H. Jathar. Environmental Science & Technology 2020 54 (14), 8568-8579; DOI: 10.1021/acs.est.0c01345
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:103959
Deposited By: George Porter
Deposited On:23 Jun 2020 19:28
Last Modified:16 Nov 2021 18:26

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