IMPACTOS DOS BTEX EM ÁREAS URBANAS DA CIDADE DO RIO DE JANEIRO
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Química Nova (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422020000700870 |
Resumo: | Most volatile organic compounds (VOC) have adverse effects on human health and the environment and react individually with different velocities and mechanisms to form ozone. The present work determined the concentration of 55 samples of benzene, toluene, ethylbenzene and xylenes (BTEX), an important subgroup of VOC, by active sampling with active carbon cartridge in the areas of Barra da Tijuca, Deodoro and Maracana between the months of December 2014 to September 2015. The samples were extracted with dichloromethane and analyzed by gas chromatography coupled to mass spectrometry (GC-MS). The percentage distribution of BTEX showed toluene as the most abundant compound in the three sites, with 54, 3% in Barra da Tijuca, 57, 4% in Deodoro and 38, 1% in the Maracana area of the total BTEX. The mean benzene/toluene (B/T) ratios were 0.12 (Maracana), 0.37 (Barra da Tijuca) and 0.23 (Deodoro), confirming the emission source as predominantly vehicular. Using reactivity scales, toluene was the compound that most contributed to the formation of ozone and benzene was less reactive than the others. The carcinogenic risk was considered indifferent in all sites. |
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IMPACTOS DOS BTEX EM ÁREAS URBANAS DA CIDADE DO RIO DE JANEIROatmospheric pollutantsvolatile organic compoundsozoneBTEXMost volatile organic compounds (VOC) have adverse effects on human health and the environment and react individually with different velocities and mechanisms to form ozone. The present work determined the concentration of 55 samples of benzene, toluene, ethylbenzene and xylenes (BTEX), an important subgroup of VOC, by active sampling with active carbon cartridge in the areas of Barra da Tijuca, Deodoro and Maracana between the months of December 2014 to September 2015. The samples were extracted with dichloromethane and analyzed by gas chromatography coupled to mass spectrometry (GC-MS). The percentage distribution of BTEX showed toluene as the most abundant compound in the three sites, with 54, 3% in Barra da Tijuca, 57, 4% in Deodoro and 38, 1% in the Maracana area of the total BTEX. The mean benzene/toluene (B/T) ratios were 0.12 (Maracana), 0.37 (Barra da Tijuca) and 0.23 (Deodoro), confirming the emission source as predominantly vehicular. Using reactivity scales, toluene was the compound that most contributed to the formation of ozone and benzene was less reactive than the others. The carcinogenic risk was considered indifferent in all sites.Sociedade Brasileira de Química2020-07-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422020000700870Química Nova v.43 n.7 2020reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.21577/0100-4042.20170562info:eu-repo/semantics/openAccessCarvalho,Josie Batista BastosFortes,Júlio Domingos NunesCorrêa,Sergio MachadoMartins,Eduardo Monteiropor2020-08-18T00:00:00Zoai:scielo:S0100-40422020000700870Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2020-08-18T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
IMPACTOS DOS BTEX EM ÁREAS URBANAS DA CIDADE DO RIO DE JANEIRO |
title |
IMPACTOS DOS BTEX EM ÁREAS URBANAS DA CIDADE DO RIO DE JANEIRO |
spellingShingle |
IMPACTOS DOS BTEX EM ÁREAS URBANAS DA CIDADE DO RIO DE JANEIRO Carvalho,Josie Batista Bastos atmospheric pollutants volatile organic compounds ozone BTEX |
title_short |
IMPACTOS DOS BTEX EM ÁREAS URBANAS DA CIDADE DO RIO DE JANEIRO |
title_full |
IMPACTOS DOS BTEX EM ÁREAS URBANAS DA CIDADE DO RIO DE JANEIRO |
title_fullStr |
IMPACTOS DOS BTEX EM ÁREAS URBANAS DA CIDADE DO RIO DE JANEIRO |
title_full_unstemmed |
IMPACTOS DOS BTEX EM ÁREAS URBANAS DA CIDADE DO RIO DE JANEIRO |
title_sort |
IMPACTOS DOS BTEX EM ÁREAS URBANAS DA CIDADE DO RIO DE JANEIRO |
author |
Carvalho,Josie Batista Bastos |
author_facet |
Carvalho,Josie Batista Bastos Fortes,Júlio Domingos Nunes Corrêa,Sergio Machado Martins,Eduardo Monteiro |
author_role |
author |
author2 |
Fortes,Júlio Domingos Nunes Corrêa,Sergio Machado Martins,Eduardo Monteiro |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Carvalho,Josie Batista Bastos Fortes,Júlio Domingos Nunes Corrêa,Sergio Machado Martins,Eduardo Monteiro |
dc.subject.por.fl_str_mv |
atmospheric pollutants volatile organic compounds ozone BTEX |
topic |
atmospheric pollutants volatile organic compounds ozone BTEX |
description |
Most volatile organic compounds (VOC) have adverse effects on human health and the environment and react individually with different velocities and mechanisms to form ozone. The present work determined the concentration of 55 samples of benzene, toluene, ethylbenzene and xylenes (BTEX), an important subgroup of VOC, by active sampling with active carbon cartridge in the areas of Barra da Tijuca, Deodoro and Maracana between the months of December 2014 to September 2015. The samples were extracted with dichloromethane and analyzed by gas chromatography coupled to mass spectrometry (GC-MS). The percentage distribution of BTEX showed toluene as the most abundant compound in the three sites, with 54, 3% in Barra da Tijuca, 57, 4% in Deodoro and 38, 1% in the Maracana area of the total BTEX. The mean benzene/toluene (B/T) ratios were 0.12 (Maracana), 0.37 (Barra da Tijuca) and 0.23 (Deodoro), confirming the emission source as predominantly vehicular. Using reactivity scales, toluene was the compound that most contributed to the formation of ozone and benzene was less reactive than the others. The carcinogenic risk was considered indifferent in all sites. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-07-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422020000700870 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422020000700870 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
10.21577/0100-4042.20170562 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Química Nova v.43 n.7 2020 reponame:Química Nova (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Química Nova (Online) |
collection |
Química Nova (Online) |
repository.name.fl_str_mv |
Química Nova (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
quimicanova@sbq.org.br |
_version_ |
1750318120562589696 |