Air quality model evaluation data for organics. 4. C2-C36 non- aromatic hydrocarbons

Matthew Fraser, Glen R. Cass, Bernd R T Simoneit, R. A. Rasmussen

Research output: Contribution to journalArticle

137 Citations (Scopus)

Abstract

The concentrations of 143 non-aromatic hydrocarbons are quantified in 36 samples (32 urban and 4 background) collected during a severe Los Angeles area photochemical smog episode. Gas phase, semivolatile, and particle phase organic compounds are viewed simultaneously across the carbon number range from C2 to C36. Compound classes studied include the n-alkanes, branched alkanes, n-alkenes, branched alkenes, diolefins, alkynes, saturated cyclic hydrocarbons, unsaturated cyclic hydrocarbons, biogenic hydrocarbons, petroleum biomarkers, and the unresolved complex mixture contained within the semivolatile and particle phase organics samples. The abundance of the n- alkanes falls almost exponentially with increasing n-alkane carbon number, and the distribution of the n-alkanes between the gas and particle phases follows vapor/particle partitioning theory. The concentrations of individual low molecular weight alkenes decline during transport across the urban area in about the order expected given their initial rates of reaction with the hydroxyl radical. Petroleum biomarker concentrations that act as tracers for particulate organics emitted from vehicle exhaust have declined substantially between 1982 and 1993, reflecting the increased penetration of catalyst- equipped cars into the vehicle fleet. The most pronounced change in vapor phase non-aromatic hydrocarbons concentrations between 1987 and 1993 is a reduction in the concentration of the lightest blending components of gasoline (e.g., butanes), reflecting new regulations that limit the Reid vapor pressure of gasoline.

Original languageEnglish (US)
Pages (from-to)2356-2367
Number of pages12
JournalEnvironmental Science and Technology
Volume31
Issue number8
DOIs
StatePublished - Aug 1997
Externally publishedYes

Fingerprint

Aromatic Hydrocarbons
Alkanes
Aromatic hydrocarbons
aromatic hydrocarbon
Air quality
alkane
Paraffins
air quality
Hydrocarbons
alkene
Cyclic Hydrocarbons
Alkenes
hydrocarbon
Olefins
Petroleum
Biomarkers
Gasoline
biomarker
Butanes
Carbon

ASJC Scopus subject areas

  • Environmental Science(all)
  • Environmental Chemistry
  • Environmental Engineering

Cite this

Air quality model evaluation data for organics. 4. C2-C36 non- aromatic hydrocarbons. / Fraser, Matthew; Cass, Glen R.; Simoneit, Bernd R T; Rasmussen, R. A.

In: Environmental Science and Technology, Vol. 31, No. 8, 08.1997, p. 2356-2367.

Research output: Contribution to journalArticle

Fraser, Matthew ; Cass, Glen R. ; Simoneit, Bernd R T ; Rasmussen, R. A. / Air quality model evaluation data for organics. 4. C2-C36 non- aromatic hydrocarbons. In: Environmental Science and Technology. 1997 ; Vol. 31, No. 8. pp. 2356-2367.
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