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- Title
Organic speciation of atmospheric particles in Alvão Natural Park (Portugal).
- Authors
Alves, Célia Anjos; Gonçalves, Cátia; Mirante, Fátima; Nunes, Teresa; Evtyugina, Margarita; de la Campa, Ana Sánchez; Rocha, Ana C.; Marques, Margarida
- Abstract
PM10 continental rural background aerosols were collected during a summer field campaign (August–September 2006) at Lamas de Ôlo in the upper zone of the Alvão Natural Park, a mountain region of northern Portugal. In addition to the determination of the carbonaceous content by a thermal–optical method, the organic speciation of aerosols was performed by gas chromatography–mass spectrometry in an effort to evaluate photo-oxidation products of biogenic volatile organic compounds and other markers for source characterization. The detailed analysis revealed relatively high concentrations of polyols and short-chain dicarboxylic, tricarboxylic, hydroxycarboxylic, and oxocarboxylic acids, many of which are thought to be indicators of secondary aerosol formation, accounting for about 70% of global chromatographically resolved mass. Major photo-oxidation products of α- and β-pinene have been detected. The tracers for the photo-oxidation of isoprene comprise two diastereoisomeric 2-methyltetrols, C5-alkene triols, and 2-methylglyceric acid, which have only recently been elucidated. In addition, the occurrence of levoglucosan and other biomass combustion tracers indicates that the site was affected by wildfires. This source contributed to more than 80% of the organic carbon mass during a period of strong forest fire influence.
- Subjects
AIR pollution; AEROSOLS; AIRSHEDS; ATMOSPHERIC deposition; AIR quality; ENVIRONMENTAL degradation; POLLUTION; ENVIRONMENTAL quality; ENVIRONMENTAL protection
- Publication
Environmental Monitoring & Assessment, 2010, Vol 168, Issue 1-4, p321
- ISSN
0167-6369
- Publication type
Article
- DOI
10.1007/s10661-009-1116-1