Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 5.668 IF 5.668
  • IF 5-year value: 6.201 IF 5-year
    6.201
  • CiteScore value: 6.13 CiteScore
    6.13
  • SNIP value: 1.633 SNIP 1.633
  • IPP value: 5.91 IPP 5.91
  • SJR value: 2.938 SJR 2.938
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 174 Scimago H
    index 174
  • h5-index value: 87 h5-index 87
Volume 16, issue 17
Atmos. Chem. Phys., 16, 11001–11018, 2016
https://doi.org/10.5194/acp-16-11001-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Atmos. Chem. Phys., 16, 11001–11018, 2016
https://doi.org/10.5194/acp-16-11001-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 06 Sep 2016

Research article | 06 Sep 2016

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

Matthieu Riva1, Thais Da Silva Barbosa2,3, Ying-Hsuan Lin1,a, Elizabeth A. Stone4, Avram Gold1, and Jason D. Surratt1 Matthieu Riva et al.
  • 1Department of Environmental Sciences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
  • 2CAPES Foundation, Brazil Ministry of Education, Brasilia, DF 70.040-020, Brazil
  • 3Departamento de Química, Instituto de Ciências Exatas, Universidade Federal Rural do Rio de Janeiro, Seropédica, Brazil
  • 4Department of Chemistry, University of Iowa, Iowa City, IA 52242, USA
  • anow at: Michigan Society of Fellows, Department of Chemistry, University of Michigan, Ann Arbor, MI 48109, USA

Abstract. 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.

Publications Copernicus
Download
Short summary
Formation of organosulfates (OSs) in secondary organic aerosol from the photooxidation of alkanes is reported from smog chamber experiments. Effects of acidity and relative humidity on OS formation were examined. Most of the OSs identified could be explained by formation of gaseous epoxide and/or hydroperoxide precursors with subsequent acid-catalyzed multiphase chemistry onto sulfate aerosol. The OSs identified here were also observed and quantified in aerosols collected in two urban areas.
Formation of organosulfates (OSs) in secondary organic aerosol from the photooxidation of...
Citation