title: Comparative study of automotive, aircraft and biogenic emissions of aldehydes and aromatic compounds.
abstract: Air samples were collected in three well characterized locations in the city of Rio de Janeiro, Brazil: downtown, the idle and taxi way areas of the national airport and an urban forest, where the main emissions are from vehicular, aircraft and biogenic sources, respectively. Aldehydes and BTEX concentrations show a characteristic profile which may be attributed to the emission sources. Formaldehyde/acetaldehyde ratios, in the early morning, were 1.39, 0.62 and 2.22 in downtown, airport and forest, respectively. Toluene/benzene ratios, for downtown, airport and forest areas, were 1.11, 1.82 and 1.06, respectively. The results show that the impact of the urban emissions on the forest is negligible as well as the impact of aircraft emissions over the urban area.
authors.affiliation: Physical Chemistry Department, Federal University of Rio de Janeiro, CT, Building A, Room 408, Cidade Universitária, Rio de Janeiro, RJ 21949-900, Brazil.
authors.forename: C S
authors.initials: CS
authors.lastname: Guimarães
authors.forename: D
authors.initials: D
authors.lastname: Custodio
authors.forename: R C S
authors.initials: RC
authors.lastname: de Oliveira
authors.forename: L S
authors.initials: LS
authors.lastname: Varandas
authors.forename: G
authors.initials: G
authors.lastname: Arbilla
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D000395:Air Pollutants, Occupational / Q000032:analysis*; D000397:Air Pollution / Q000032:analysis*; D000401:Aircraft; D000447:Aldehydes / Q000032:analysis*; D001555:Benzene Derivatives / Q000032:analysis; D001938:Brazil; D002273:Carcinogens / Q000032:analysis; D004784:Environmental Monitoring; D005557:Formaldehyde / Q000032:analysis; D006841:Hydrocarbons, Aromatic / Q000032:analysis*; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D000395:Air Pollutants, Occupational; D000447:Aldehydes; D001555:Benzene Derivatives; D002273:Carcinogens; D006841:Hydrocarbons, Aromatic; D001335:Vehicle Emissions; D005557:Formaldehyde