Main ozone-forming VOCs in the city of Sao Paulo: observations, modelling and impacts
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Air Quality Atmosphere and Health
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High-ozone concentrations currently represent the
main air pollution problem in the city of São Paulo, Brazil. To
elucidate the main volatile organic compounds (VOCs),
which act as ozone precursors, samples from air quality monitoring
stations were evaluated. Thirty-five samples were collected
in August–September of 2006 and 43 in July–August of
2008, when the consumption of ethanol was about 50%of the
total fuel used in the São Paulo Metropolitan Area. Samples
were collected using electropolished stainless canisters.
Chemical analyses were performed on pre-concentrated samples
followed by gas chromatograph with flame ionization and
mass spectrometry detection. The incremental reactivity scale
was used to rank the ozone precursors using the Ozone
Isopleth Package for Research (OZIPR) trajectory model
coupled with chemical mechanism Statewide Air Pollution
Research Center (SAPRC). Sixty-nine species of VOCs were
quantified, and the ten main ozone precursors identified in
2008 were as follows: formaldehyde (42.8 %), acetaldehyde
(13.9 %) , ethene (12.2 %) , propene (5.1 %), 1-
methylcyclopentene (3.0 %), p-xylene (2.4 %), 1-butene
(2.1 %), trans-2-pentene (1.9 %), 2-methyl 2-butene (1.7 %)
and trans-2-butene (1.6 %). Volatile organic compound mass
distribution showed that in 2008 alkanes represented 46 % of
the total VOCs, alkenes 27 %, aromatics 14 %, alkadienes 1%
and aldehydes 12 %.
Como referenciar
ALVIM, DEBORA S.; GATTI, LUCIANA V.; CORREA, SERGIO M.; CHIQUETTO, JULIO B.; ROSSATTI, CARLOS de S.; PRETTO, ANGELICA; SANTOS, MARIA H. dos; YAMAZAKI, AMELIA; ORLANDO, JOAO P.; SANTOS, GUACIARA M. Main ozone-forming VOCs in the city of Sao Paulo: observations, modelling and impacts. Air Quality Atmosphere and Health, v. 10, n. 4, p. 421-435, 2017. DOI: 10.1007/s11869-016-0429-9. Disponível em: http://repositorio.ipen.br/handle/123456789/27728. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.