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Preprints
https://doi.org/10.5194/acp-2020-492
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-2020-492
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  16 Jun 2020

16 Jun 2020

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A revised version of this preprint is currently under review for the journal ACP.

Secondary Organic Aerosol Yields from the Oxidation of Benzyl Alcohol

Sophia M. Charan, Reina S. Buenconsejo, and John H. Seinfeld Sophia M. Charan et al.
  • California Institute of Technology, Pasadena, California 91125, United States

Abstract. Recent inventory-based analysis suggests that emissions of volatile chemical products in urban areas are now competitive with those from the transportation sector. Understanding the potential for secondary organic aerosol formation from these volatile chemical products is, therefore, critical to predicting levels of aerosol and for formulating policy to reduce aerosol exposure. It is clear that a plethora of oxygenated compounds are either emitted directly into the atmosphere or emitted indoors and later escape into the outdoors. Experimental and computationally simulated environmental chamber data provide an understanding of aerosol yield and chemistry under relevant urban conditions (5–200 ppb NO and 291–312 K) and give insight into the effect of volatile chemical products on the production of secondary organic aerosol. Benzyl alcohol, one of these volatile chemical products, is found to have a large secondary organic aerosol formation potential. At NO concentrations of ~ 80 ppb and 291 K, secondary organic aerosol mass yields for benzyl alcohol can reach 1.

Sophia M. Charan et al.

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Sophia M. Charan et al.

Sophia M. Charan et al.

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Short summary
In urban areas, the emissions from volatile chemical products may be responsible for the formation of as much particulate matter as motor vehicles. Since exposure to particulate matter is a public health crisis, understanding its formation is critical. In this work we investigate the secondary organic aerosol formation potential of benzyl alcohol, an important compound that is representative of some of these new emission sources, and find that more particulate matter forms than is expected.
In urban areas, the emissions from volatile chemical products may be responsible for the...
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