Air quality model evaluation data for organics. 6. C3 - C24 organic acids

Matthew Fraser, G. R. Cass, B. R T Simoneit

Research output: Contribution to journalArticle

75 Citations (Scopus)

Abstract

The atmospheric concentrations of 47 carboxylic acids in the semivolatile and particle phases are quantified in the Los Angeles area, as part of a larger study of the vapor-phase, semivolatile, and particle-phase organic compounds. Variations in the spatial and temporal distributions of acid concentrations are analyzed to determine whether atmospheric formation or primary emissions are responsible for the observed levels. Relatively low molecular weight aliphatic dicarboxylic acids (e.g., butanedioic acid, hexanedioic acid, and propanedioic acid) and some n-alkanoic acids (e.g., n-octanoic acid and n-nonanoic acid) are found at an offshore sampling location at levels comparable to urban area concentrations indicating that these compounds or their atmospheric precursors may be derived from long-range transport or natural background sources. Some aromatic carboxylic acids (e.g., benzoic acid and 1,2-benzenedicarboxylic acid) have spatial and temporal distributions suggesting that formation from anthropogenic emissions of gaseous precursors dominates their atmospheric concentrations. Additionally, the distributions of aliphatic carboxylic acid concentrations known to be emitted from primary sources (e.g., hexadecanoic acid and octadecanoic acid) are consistent with direct emissions as the dominant source of these compounds.

Original languageEnglish (US)
Pages (from-to)446-453
Number of pages8
JournalEnvironmental Science and Technology
Volume37
Issue number3
DOIs
StatePublished - Feb 1 2003
Externally publishedYes

Fingerprint

Organic acids
Carboxylic Acids
organic acid
Air quality
air quality
Carboxylic acids
Acids
acid
Dicarboxylic Acids
Benzoic Acid
Palmitic Acid
Succinic Acid
Organic compounds
carboxylic acid
Molecular weight
Vapors
Sampling
temporal distribution
evaluation
Benzoic acid

ASJC Scopus subject areas

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

Cite this

Air quality model evaluation data for organics. 6. C3 - C24 organic acids. / Fraser, Matthew; Cass, G. R.; Simoneit, B. R T.

In: Environmental Science and Technology, Vol. 37, No. 3, 01.02.2003, p. 446-453.

Research output: Contribution to journalArticle

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