Journal of Shanghai University(Natural Science Edition) ›› 2016, Vol. 22 ›› Issue (2): 159-171.doi: 10.3969/j.issn.1007-2861.2016.01.012

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Dicarbonyl compounds and formation secondary organic aerosol in atmosphere

ZHOU Huan, FENG Yanli, JIANG Zhiming, QIU Yiqin, ZHANG Wensheng   

  1. Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China
  • Received:2016-01-16 Online:2016-04-30 Published:2016-04-30

Abstract:

Contribution of secondary organic aerosol (SOA) to atmospheric haze is a hot topic in atmospheric chemistry. Dicarbonyl compounds (glyoxal and methylglyoxal) are intermediate products in atmospheric photochemical reactions, greatly contributing to the formation and growth of SOA. Dicarbonyl compounds in the atmosphere mainly come from biogenic sources such as isoprene and anthropogenic source such as acetylene and other volatile organic compounds oxidation. Dicarbonyl compounds can form SOA by gas particle partitioning, which is a reversible process. Dicarbonyl compounds can produce significant aerosol yields, attributed to hydration, polymerization and oxidation and other reactions to produce low volatile products, which is an irreversible process. A common detection method of dicarbonyl compounds is to use gas chromatography-mass spectrometry (GC/MS) after derivatization.

Key words:  gas particle partitioning ,  irreversible reaction ,  reversible reaction ,  secondary organic aerosol (SOA), dicarbonyl compound