Volatile organic compounds in a residential and commercial urban area with a diesel, compressed natural gas and oxygenated gasoline vehicular fleet.
Air samples were collected in a typical residential and commercial area in Rio de Janeiro, Brazil, where buses and trucks use diesel and light duty vehicles use compressed natural gas, ethanol, and gasohol (gasoline blended with ethanol) as fuel. A total of 66 C3-C12 volatile organic compounds (VOCs) were identified. The most abundant compounds, on a mass concentration basis, included propane, isobutane, i-pentane, m,p-xylene, 1,3,5-trimethylbenzene, toluene, styrene, ethylbenzene, isopropylbenzene, o-xylene and 1,2,4-trimethylbenzene. Two VOCs photochemical reactivity rankings are presented: one involves reaction with OH and the other involves production of ozone.
Departamento de Engenharia Sanitária e Meio Ambiente, Faculdade de Engenharia, Universidade do Estado do Rio de Janeiro, Sala 5008, Bloco E, Rio de Janeiro, RJ 20550-900, Brazil. edmmartins@gmail.com
Eduardo Monteiro
EM
Martins
Graciela
G
Arbilla
Luciana Vanni
LV
Gatti
D000395:Air Pollutants, Occupational / Q000032:analysis*; D001938:Brazil; D002248:Carbon Monoxide / Q000032:analysis; D004784:Environmental Monitoring; D005579:Fossil Fuels / Q000032:analysis*; D008401:Gas Chromatography-Mass Spectrometry; D005742:Gasoline / Q000032:analysis*; D009930:Organic Chemicals / Q000032:analysis*; D010083:Oxidants, Photochemical / Q000032:analysis; D010100:Oxygen / Q000737:chemistry*; D010126:Ozone / Q000032:analysis; D001335:Vehicle Emissions / Q000032:analysis*
D000395:Air Pollutants, Occupational; D005579:Fossil Fuels; D005742:Gasoline; D009930:Organic Chemicals; D010083:Oxidants, Photochemical; D001335:Vehicle Emissions; D010126:Ozone; D002248:Carbon Monoxide; D010100:Oxygen