Publications
Detailed Information
Photochemical organonitrate formation in wet aerosols
Cited 22 time in
Web of Science
Cited 23 time in Scopus
- Authors
- Issue Date
- 2016-10
- Publisher
- COPERNICUS GESELLSCHAFT MBH
- Citation
- ATMOSPHERIC CHEMISTRY AND PHYSICS, Vol.16 No.19, pp.12631-12647
- Abstract
- Water is the most abundant component of atmospheric fine aerosol. However, despite rapid progress, multiphase chemistry involving wet aerosols is still poorly understood. In this work, we report results from smog chamber photooxidation of glyoxal-and OH-containing ammonium sulfate or sulfuric acid particles in the presence of NOx and O-3 at high and low relative humidity. Particles were analyzed using ultra-performance liquid chromatography coupled to quadrupole time-of-flight mass spectrometry (UPLC-Q-TOF-MS). During the 3 h irradiation, OH oxidation products of glyoxal that are also produced in dilute aqueous solutions (e.g., oxalic acids and tartaric acids) were formed in both ammonium sulfate (AS) aerosols and sulfuric acid (SA) aerosols. However, the major products were organonitrogens (CHNO), organosulfates (CHOS), and organonitrogen sulfates (CHNOS). These were also the dominant products formed in the dark chamber, indicating non-radical formation. In the humid chamber (>70% relative humidity, RH), two main products for both AS and SA aerosols were organonitrates, which appeared at m/z(-) 147 and 226. They were formed in the aqueous phase via non-radical reactions of glyoxal and nitric acid, and their formation was enhanced by photochemistry because of the photochemical formation of nitric acid via reactions of peroxy radicals, NOx and OH during the irradiation.
- ISSN
- 1680-7316
- Files in This Item:
- There are no files associated with this item.
Related Researcher
- Graduate School of Public Health
- Department of Environmental Health Sciences
Item View & Download Count
Items in S-Space are protected by copyright, with all rights reserved, unless otherwise indicated.