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Reactive intermediates revealed in secondary organic aerosol formation from isoprene
Open accessAbstract
Isoprene is a significant source of atmospheric organic aerosol; however, the oxidation pathways that lead to secondary organic aerosol (SOA) have remained elusive. Here, we identify the role of two key reactive intermediates, epoxydiols of isoprene (IEPOX = β -IEPOX + δ -IEPOX) and methacryloylperoxynitrate (MPAN), which are formed during isoprene oxidation under low- and high-NO x conditions, respectively. Isoprene low-NO x SOA is enhanced in the presence of acidified sulfate seed aerosol (mass yield 28.6%) over that in the presence of neutral aerosol (mass yield 1.3%). Increased uptake of IEPOX by acid-catalyzed particle-phase reactions is shown to explain this enhancement. Under high-NO x conditions, isoprene SOA formation occurs through oxidation of its second-generation product, MPAN. The similarity of the composition of SOA formed from the photooxidation of MPAN to that formed from isoprene and methacrolein demonstrates the role of MPAN in the formation of isoprene high-NO x SOA. Reactions of IEPOX and MPAN in the presence of anthropogenic pollutants (i.e., acidic aerosol produced from the oxidation of SO 2 and NO 2 , respectively) could be a substantial source of “missing urban SOA” not included in current atmospheric models.
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Cited by
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Zhang, R., Wang, G., Guo, S., Zamora, M. L., Ying, Q., Lin, Y., Wang, W., Hu, M., & Wang, Y. (2015) · Chemical Reviews · doi:10.1021/acs.chemrev.5b00067 · Cited by 1,426
Bianchi, F., Kurtén, T., Riva, M., Mohr, C., Rissanen, M. P., Roldin, P., Berndt, T., Crounse, J. D., Wennberg, P. O., Mentel, T. F., et al. (2019) · Chemical Reviews · doi:10.1021/acs.chemrev.8b00395 · Cited by 1,084
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West, J. J., Cohen, A., Dentener, F., Brunekreef, B., Zhu, T., Armstrong, B., Bell, M. L., Brauer, M., Carmichael, G., Costa, D. L., et al. (2016) · Environmental Science & Technology · doi:10.1021/acs.est.5b03827 · Cited by 390
Appel, K. W., Napelenok, S. L., Foley, K. M., Pye, H. O. T., Hogrefe, C., Luecken, D. J., Bash, J. O., Roselle, S. J., Pleim, J. E., Foroutan, H., et al. (2017) · Geoscientific Model Development · doi:10.5194/gmd-10-1703-2017 · Cited by 336
Metadata
- Authors
- Surratt, J. D., Chan, A. W. H., Eddingsaas, N. C., Chan, M., Loza, C. L., Kwan, A. J., Hersey, S. P., Flagan, R. C., Wennberg, P. O., & Seinfeld, J. H.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 2009-12-31
- Volume
- 107
- Issue
- 15
- Pages
- 6640-6645
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W1966779205
- Cited by
- 1,081
- References
- 0
- FWCI
- 19.98
- Type
- journal article
- Language
- en
- Open access
- green
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- Surratt, J. D., Chan, A. W. H., Eddingsaas, N. C., Chan, M., Loza, C. L., Kwan, A. J., Hersey, S. P., Flagan, R. C., Wennberg, P. O., & Seinfeld, J. H. (2010). Reactive intermediates revealed in secondary organic aerosol formation from isoprene. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.0911114107
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