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- W1994843876 abstract "Benzene, toluene, ethylbenzene and xylenes (BTEX) are hydrocarbons present in fossil fuels and, consequently, are also present in fuel combustion emissions, as toxic organic volatile compounds. Concentrations of these compounds found in the atmosphere of urban regions are indicative of vehicular pollution. In this work were studied BTEX atmospheric concentrations from five sites of metropolitan area of Campinas (Sao Paulo, Brazil), which have different characteristics: (1) suburban site; (2) downtown site; (3) urban site A; (4) urban site B; (5) industrial. The most abundant compound found in all sites was toluene (2.4 – 10 μg m -3 ). B/T ratio was used to study predominance of vehicular emissions and X/E indicates the distance from the site to the sources due to different photochemical reactivity of the compounds. It was possible to observe that sites away from the urban region and located in the predominant wind direction have lower concentration of BTEX as well as lower X/E ratios, indicating that pollution is due to transport emissions." @default.
- W1994843876 created "2016-06-24" @default.
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- W1994843876 date "2011-09-19" @default.
- W1994843876 modified "2023-10-18" @default.
- W1994843876 title "BTEX concentrations in the atmosphere of the metropolitan area of Campinas (São Paulo, Brazil)" @default.
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- W1994843876 doi "https://doi.org/10.2495/air110191" @default.
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