What question did this study set out to answer?

To identify and characterize aliphatic organosulfates formed during the photooxidation of intermediate-volatility alkanes and assess their occurrence in ambient urban particulate matter.

September 6, 2016Atmospheric chemistry and physicsOpen Access

Chemical characterization of organosulfates in secondary organic aerosolderived from the photooxidation of alkanes

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Authors

MRMatthieu RivaUniversité Claude Bernard Lyon 1 TBThaís da Silva BarbosaUniversidade Federal de Juiz de Fora YLYing‐Hsuan LinUniversity of California, Riverside

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Implication

Smog chamber study demonstrates organosulfate formation from alkane photooxidation in urban air, highlighting anthropogenic contributions to secondary organic aerosols.

Key Points

To identify and characterize aliphatic organosulfates formed during the photooxidation of intermediate-volatility alkanes and assess their occurrence in ambient urban particulate matter.
Photochemically oxidized dodecane, cyclodecane, and decalin in an outdoor smog chamber under varying humidity conditions and in the presence of non-acidified or acidified ammonium sulfate seed aerosol.
Analyzed collected aerosol samples using ultra performance liquid chromatography coupled to electrospray ionization high-resolution quadrupole time-of-flight mass spectrometry (UPLC/ESI-HR-QTOFMS).
Surveyed and quantified the identified organosulfate compounds in ambient fine aerosol samples collected from Lahore, Pakistan, and Pasadena, California.
Organosulfates formed predominantly through the generation of gaseous epoxides followed by acid-catalyzed reactive uptake onto sulfate seed aerosols, as well as through heterogeneous reactions of hydroperoxides.
Target aliphatic organosulfates from alkane precursors were positively identified and quantified in urban fine aerosol samples from both Lahore and Pasadena.
Decalin- and cyclodecane-derived organosulfates proved to be isobars of known biogenic monoterpene organosulfates, emphasizing the need for precise mass spectrometry to avoid misattributing anthropogenic smog to natural sources.

Cite This Study

Riva et al. (2016) studied this question.

synapsesocial.com/papers/69d770d2086f9d6299f3101d https://doi.org/10.5194/acp-16-11001-2016

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Implication

Smog chamber study demonstrates organosulfate formation from alkane photooxidation in urban air, highlighting anthropogenic contributions to secondary organic aerosols.

Chemical characterization of organosulfates in secondary organic aerosolderived from the photooxidation of alkanes

Discussion

Member takes

Implication

Key Points

Cite This Study

Chemical characterization of organosulfates in secondary organic aerosolderived from the photooxidation of alkanes

Discussion

Member takes

Implication

Key Points

Cite This Study

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