Assessment of air quality in Viana do Castelo, Portugal, in the scope of the polis programme

Alves, Célia

doi:10.1590/s0100-40422007000700011

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…Toluene was found at higher concentrations than xylenes during the whole of 2006 and 2011/2012. Higher concentrations of this pollutant were observed in the months of September and October of 2011, and February, April, June, July and August of 2012, which is due to the lower reactivity of toluene compared to xylenes, and because toluene is present in higher concentrations in fossil fuel composition (Carter, 2000;Alves & Tomé, 2007;Okada et al, 2012). On the Maximum Incremental Reactivity (MIR) scale, the following order for the reactivity of these HCs in the ozone formation is (from least to most reactive): toluene, p-xylene, o-xylene and m-xylene.…”

Section: Concentrations Of Volatile Organic Compounds In the Megacitymentioning

confidence: 99%

Concentrations of Volatile Organic Compounds in the Megacity of São Paulo in 2006 and 2011/2012 - A Comparative Study

et al. 2020

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The focus of this study was to measure the Volatile Organic Compounds (VOCs) concentrations in the megacity – São Paulo Metropolitan Area (SPMA). The measurements analyzed in this study included 78 hydrocarbon (HC) samples collected during 2006, and 66 samples of HC, 62 of aldehydes and 42 of ethanol collected during 2011-2012. The observational results showed that the consumption of ethanol, gasoline and diesel from 2006 to 2012 increased by 64 %, 23 % and 25 %, respectively, with substantial changes in the atmospheric composition. The 10 most abundant VOCs in the atmosphere found during 2011/2012 at CETESB IPEN/USP air quality monitoring station were ethanol, acetaldehyde, formaldehyde, acetone, propane, ethene, ethane, butane, 1-ethyl-4-methyl benzene, and 1,2,4-trimethyl benzene. During the 2006 campaign, alkanes represented 54.8 % of the total HC concentration, alkenes 29.2 %, aromatics 13.6 %, and alkadienes 2.4 %. On the other hand, during the 2011-2012 campaign, aldehydes represented 35.3 % of the VOCs, ethanol 22.6 %, aromatics 15.5 %, alkanes 13.5 %, acetone 6.8 %, alkenes 6.0 %, and alkadienes with less than 0.1 %. An increase in VOCs concentrations in the SPMA atmosphere from 2006 to 2012, such as aldehydes and aromatics (which are important ozone precursors) was measured.

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Section: Concentrations Of Volatile Organic Compounds In the Megacitymentioning

confidence: 99%

Concentrations of Volatile Organic Compounds in the Megacity of São Paulo in 2006 and 2011/2012 - A Comparative Study

et al. 2020

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Efeitos da poluição atmosférica na área do Aeroporto Internacional de São Paulo - Guarulhos sobre ensaio de bioindicadores vegetais

Rocco¹

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Estudos dos compostos orgânicos voláteis precursores de ozônio na cidade de São Paulo

Alvim

Gatti

Santos³

et al. 2011

Eng. Sanit. Ambient.

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O ozônio é o principal problema de poluição do ar na cidade de São Paulo. Este estudo, que foi realizado em uma estação de monitoramento da qualidade do ar da Companhia de Tecnologia de Saneamento Ambiental (CETESB), enfoca a elucidação dos principais compostos orgânicos voláteis precursores de ozônio na atmosfera paulistana. Foram coletadas 36 amostras nos meses de agosto e setembro de 2006, nos quais o consumo de etanol era de aproximadamente 50% nesta época. Foram quantificadas 69 espécies de compostos orgânicos voláteis, nos quais os dez compostos mais importantes na formação de O3 foram: 1-buteno (6,8%), eteno (6,5%), formaldeído (6,1%), acetaldeído (5,5%), tolueno (4,8%), 1-etil-4-metilbenzeno (3,7%), trans-2-penteno (3,7%), propeno (3,7%), trans-2-buteno (3,5%) e 1-metilciclopenteno (3,5%). As classes mais abundantes em concentração no ar foram: alcanos (45%), alcenos (26%), aromáticos (14%), aldeídos (13%) e alcadienos (2%).

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Assessment of air quality in Viana do Castelo, Portugal, in the scope of the polis programme

Cited by 3 publications

References 23 publications

Concentrations of Volatile Organic Compounds in the Megacity of São Paulo in 2006 and 2011/2012 - A Comparative Study

Concentrations of Volatile Organic Compounds in the Megacity of São Paulo in 2006 and 2011/2012 - A Comparative Study

Efeitos da poluição atmosférica na área do Aeroporto Internacional de São Paulo - Guarulhos sobre ensaio de bioindicadores vegetais

Estudos dos compostos orgânicos voláteis precursores de ozônio na cidade de São Paulo

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