Formation of secondary organic aerosols from isoprene and its gas-phase oxidation products through reaction with hydrogen peroxide

M. Claeys, W. Wang, A.C. Ion, I. Kourtchev, A. Gelencsér, W. Maenhaut

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247 Citations (Scopus)

Abstract

Aerosols produced over forests impair visibility and may affect climate by scattering and absorbing solar radiation and by serving as cloud condensation nuclei. Here, we introduce, to our knowledge, a new route to secondary organic aerosol formation from isoprene and its gas-phase oxidation products, methacrolein and methacrylic acid, namely, multiphase acid-catalysed oxidation with hydrogen peroxide, a perfect analogue to atmospheric sulphate formation. We demonstrate that the formation of major secondary organic aerosol components that are present in natural forest aerosols collected at K-puszta, Hungary, during the summer of 2003, namely, 2-methyltetrols and 2,3-dihydroxymethacrylic acid, can be explained by this mechanism.

Original languageEnglish
Pages (from-to)4093-4098
Number of pages6
JournalAtmospheric Environment
Volume38
Issue number25
Early online date20 Jul 2004
DOIs
Publication statusPublished - Aug 2004
Externally publishedYes

Keywords

  • Secondary organic aerosol
  • Biogenic hydrocarbons
  • Isoprene
  • Photo-oxidation

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