| Title: | Limited Secondary Organic Aerosol Production from Acyclic Oxygenated Volatile Chemical Products |
| Author(s): | Humes MB; Wang M; Kim S; Machesky JE; Gentner DR; Robinson AL; Donahue NM; Presto AA; |
| Address: | "Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States. Department of Chemistry, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States. Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States. Department of Chemical & Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States" |
| ISSN/ISBN: | 1520-5851 (Electronic) 0013-936X (Print) 0013-936X (Linking) |
| Abstract: | "Volatile chemical products (VCPs) have recently been identified as potentially important unconventional sources of secondary organic aerosol (SOA), in part due to the mitigation of conventional emissions such as vehicle exhaust. Here, we report measurements of SOA production in an oxidation flow reactor from a series of common VCPs containing oxygenated functional groups and at least one oxygen within the molecular backbone. These include two oxygenated aromatic species (phenoxyethanol and 1-phenoxy-2-propanol), two esters (butyl butyrate and butyl acetate), and four glycol ethers (carbitol, methyl carbitol, butyl carbitol, and hexyl carbitol). We measured gas- and particle-phase products with a suite of mass spectrometers and particle-sizing instruments. Only the aromatic VCPs produce SOA with substantial yields. For the acyclic VCPs, ether and ester functionality promotes fragmentation and hinders autoxidation, whereas aromatic rings drive SOA formation in spite of the presence of ether groups. Therefore, our results suggest that a potential strategy to reduce urban SOA from VCPs would be to reformulate consumer products to include less oxygenated aromatic compounds" |
| Keywords: | Aerosols/chemistry *Air Pollutants/analysis Ether Organic Chemicals/chemistry Vehicle Emissions/analysis NOx Pm2.5 aerosol mass yield oxidation flow reactor secondary organic aerosol volatile chemical product; |
| Notes: | "MedlineHumes, Mackenzie B Wang, Mingyi Kim, Sunhye Machesky, Jo E Gentner, Drew R Robinson, Allen L Donahue, Neil M Presto, Albert A eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. 2022/04/09 Environ Sci Technol. 2022 Apr 19; 56(8):4806-4815. doi: 10.1021/acs.est.1c07354. Epub 2022 Apr 8" |
