Volatile organic compounds in a residential and commercial urban area with a diesel, compressed natural gas and oxygenated gasoline vehicular fleet.

Bull Environ Contam Toxicol

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.

Published: February 2010

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.

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http://dx.doi.org/10.1007/s00128-009-9886-2DOI Listing

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