Effect of Humidity on the Composition of Isoprene Photooxidation Secondary Organic Aerosol
Journal Article
·
· Atmospheric Chemistry and Physics, 11(14):6931-3699
The effect of relative humidity (RH) on the composition and concentrations of gas-phase products and secondary organic aerosol (SOA) generated from the photooxidation of isoprene under high-NOx conditions was investigated. The yields of most gas-phase products were the same regardless of initial water vapor concentration with exception of hydroxyacetone and glycolaldehyde, which were considerably affected by RH. A significant change was observed in the SOA composition, with many unique condensed-phase products formed under humid (90% RH) vs. dry (<2% RH) conditions, without any observable effect on the rate and extent of the SOA mass growth.
- Research Organization:
- Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-76RL01830
- OSTI ID:
- 1019192
- Report Number(s):
- PNNL-SA-78897; 34503; 39957; KP1704020
- Journal Information:
- Atmospheric Chemistry and Physics, 11(14):6931-3699, Journal Name: Atmospheric Chemistry and Physics, 11(14):6931-3699 Journal Issue: 14 Vol. 11; ISSN 1680-7316
- Country of Publication:
- United States
- Language:
- English
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