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Molecular Composition of Oxygenated Organic Molecules and Their Contributions to Organic Aerosol in Beijing.
- Source :
-
Environmental science & technology [Environ Sci Technol] 2022 Jan 18; Vol. 56 (2), pp. 770-778. Date of Electronic Publication: 2021 Nov 22. - Publication Year :
- 2022
-
Abstract
- The understanding at a molecular level of ambient secondary organic aerosol (SOA) formation is hampered by poorly constrained formation mechanisms and insufficient analytical methods. Especially in developing countries, SOA related haze is a great concern due to its significant effects on climate and human health. We present simultaneous measurements of gas-phase volatile organic compounds (VOCs), oxygenated organic molecules (OOMs), and particle-phase SOA in Beijing. We show that condensation of the measured OOMs explains 26-39% of the organic aerosol mass growth, with the contribution of OOMs to SOA enhanced during severe haze episodes. Our novel results provide a quantitative molecular connection from anthropogenic emissions to condensable organic oxidation product vapors, their concentration in particle-phase SOA, and ultimately to haze formation.
- Subjects :
- Aerosols analysis
Beijing
Humans
Air Pollutants analysis
Volatile Organic Compounds
Subjects
Details
- Language :
- English
- ISSN :
- 1520-5851
- Volume :
- 56
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Environmental science & technology
- Publication Type :
- Academic Journal
- Accession number :
- 34806377
- Full Text :
- https://doi.org/10.1021/acs.est.1c05191