Chemical characterization of organosulfates in secondary organic aerosol derived from the photooxidation of alkanes

Riva, M.; Da Silva Barbosa, T.; Lin, Y.-H.; Stone, E. A.; Gold, A.; Surratt, J. D.

doi:10.5194/acp-16-11001-2016

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Chemical characterization of organosulfates in secondary organic aerosol derived from the photooxidation of alkanes

2016
By Riva, M. ; Da Silva Barbosa, T. ; Lin, Y.-H. ; ...
Source: Atmos. Chem. Phys., 16, 11001–11018

[PDF-2.84 MB]

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Details:

Journal Title:

Atmospheric Chemistry and Physics
Personal Author:

Riva, M. ; Da Silva Barbosa, T. ; Lin, Y.-H. ; Stone, E. A. ; Gold, A. ; ... More +

Riva, M. ; Da Silva Barbosa, T. ; Lin, Y.-H. ; Stone, E. A. ; Gold, A. ; Surratt, J. D. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office)

OAR (Oceanic and Atmospheric Research) ; CPO (Climate Program Office) Less -
Description:

We report the formation of aliphatic organosulfates (OSs) in secondary organic aerosol (SOA) from the photooxidation of C10–C12 alkanes. The results complement those from our laboratories reporting the formation of OSs and sulfonates from gas-phase oxidation of polycyclic aromatic hydrocarbons (PAHs). Both studies strongly support the formation of OSs from the gas-phase oxidation of anthropogenic precursors, as hypothesized on the basis of recent field studies in which aromatic and aliphatic OSs were detected in fine aerosol collected from several major urban locations. In this study, dodecane, cyclodecane and decalin, considered to be important SOA precursors in urban areas, were photochemically oxidized in an outdoor smog chamber in the presence of either non-acidified or acidified ammonium sulfate seed aerosol. Effects of acidity and relative humidity on OS formation were examined. Aerosols collected from all experiments were characterized by ultra performance liquid chromatography coupled to electrospray ionization high-resolution quadrupole time-of-flight mass spectrometry (UPLC/ESI-HR-QTOFMS). Most of the OSs identified could be explained by formation of gaseous epoxide precursors with subsequent acid-catalyzed reactive uptake onto sulfate aerosol and/or heterogeneous reactions of hydroperoxides. The OSs identified here were also observed and quantified in fine urban aerosol samples collected in Lahore, Pakistan, and Pasadena, CA, USA. Several OSs identified from the photooxidation of decalin and cyclodecane are isobars of known monoterpene organosulfates, and thus care must be taken in the analysis of alkane-derived organosulfates in urban aerosol.
Keywords:

[+]

Aerosols Organosulfur Compounds
Source:

Atmos. Chem. Phys., 16, 11001–11018
DOI:

https://doi.org/10.5194/acp-16-11001-2016
Document Type:

Journal Article
Funding:

Grant no. NA13OAR4310064
Rights Information:

CC BY
Compliance:

CHORUS
Main Document Checksum:

[+]

urn:sha256:81e9ca4cf561439bc13d9f1a709ee5cea94bae395ef54ea8027bd45bb38a7517
Download URL:

https://repository.library.noaa.gov/view/noaa/48287/noaa_48287_DS1.pdf
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