Aqueous OH oxidation of ambient organic aerosol and cloud water organics: Formation of highly oxidized products

被引：95
作者：
Lee, Alex K. Y. [1 ]
Herckes, P. [2 ]
Leaitch, W. R. [3 ]
Macdonald, A. M. [3 ]
Abbatt, J. P. D. [1 ]
机构：
[1] Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, Canada
[2] Arizona State Univ, Dept Chem & Biochem, Tempe, AZ 85287 USA
[3] Environm Canada, Sci & Technol Branch, Toronto, ON M3H 5T4, Canada
来源：
GEOPHYSICAL RESEARCH LETTERS | 2011年 / 38卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
MASS-SPECTROMETER; CHEMISTRY; GLYOXAL; PARTICLES; EVOLUTION; SPECTRA; PHASE;
D O I：
10.1029/2011GL047439
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Aqueous chemistry can play a vital role in secondary organic aerosol (SOA) formation and aging. A novel analytical approach that allows for simultaneous photo-oxidation and atomization of reacting bulk solutions coupled to an aerosol mass spectrometer (AMS) investigates aqueous OH oxidation of ambient biogenic SOA, cloud water from a biogenic environment, glyoxal, and mixtures of glyoxal with alpha-pinene SOA components. This is the first study of aqueous oxidative aging of ambient SOA and cloud water organics. Starting with an AMS-based observational framework, we show that aqueous oxidation of biogenic SOA in the presence of glyoxal can better represent observed atmospheric aging than when glyoxal is absent. Oxidation of glyoxal alongside semi-volatile SOA components leads to the production of highly oxidized SOA. Citation: Lee, A. K. Y., P. Herckes, W. R. Leaitch, A. M. Macdonald, and J. P. D. Abbatt (2011), Aqueous OH oxidation of ambient organic aerosol and cloud water organics: Formation of highly oxidized products, Geophys. Res. Lett., 38, L11805, doi: 10.1029/2011GL047439.
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页数：5
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