Road tunnel, roadside, and urban background measurements of aliphatic compounds in size-segregated particulate matter
Autor(a) principal: | |
---|---|
Data de Publicação: | 2016 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.21/7272 |
Resumo: | Particulate matter samples were collected in a road tunnel in Lisbon (PM0.5, PM0.5-1, PM1-2.5, and PM2.5-10) and at two urban locations representing roadside and background stations (PM2.5 and PM2.5-10). Samples were analysed for organic and elemental carbon (OC and EC), n-alkanes, n-alkenes, hopanes, some isoprenoid compounds, and steranes. Particulate matter concentrations in the tunnel were 17-31 times higher than at roadside in the vicinity, evidencing an aerosol origin almost exclusively in fresh vehicle emissions. PM0.5 in the tunnel comprised more than 60% and 80% of the total OC and EC mass in PM10, respectively. Concentrations of the different aliphatic groups of compounds in the tunnel were up to 89 times higher than at roadside and 143 times higher than at urban background. Based on the application of hopane-to-OC or hopanes-to-EC ratios obtained in the tunnel, it was found that vehicle emissions are the dominant contributor to carbonaceous particles in the city but do not represent the only source of these triterpenic compounds. Contrary to what has been observed in other studies, the Sigma hopane-to-EC ratios were higher in summer than in winter, suggesting that other factors (e.g. biomass burning, dust resuspension, and different fuels/engine technologies) prevail in relation to the photochemical decay of triterpenoid hydrocarbons from vehicle exhaust |
id |
RCAP_6c8ded77bca1188df69a47b45b5d1c51 |
---|---|
oai_identifier_str |
oai:repositorio.ipl.pt:10400.21/7272 |
network_acronym_str |
RCAP |
network_name_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository_id_str |
7160 |
spelling |
Road tunnel, roadside, and urban background measurements of aliphatic compounds in size-segregated particulate matterSize-segregated particlesHopanesAlkanesRoad tunnelRoadsideUrban backgroundParticulate matter samples were collected in a road tunnel in Lisbon (PM0.5, PM0.5-1, PM1-2.5, and PM2.5-10) and at two urban locations representing roadside and background stations (PM2.5 and PM2.5-10). Samples were analysed for organic and elemental carbon (OC and EC), n-alkanes, n-alkenes, hopanes, some isoprenoid compounds, and steranes. Particulate matter concentrations in the tunnel were 17-31 times higher than at roadside in the vicinity, evidencing an aerosol origin almost exclusively in fresh vehicle emissions. PM0.5 in the tunnel comprised more than 60% and 80% of the total OC and EC mass in PM10, respectively. Concentrations of the different aliphatic groups of compounds in the tunnel were up to 89 times higher than at roadside and 143 times higher than at urban background. Based on the application of hopane-to-OC or hopanes-to-EC ratios obtained in the tunnel, it was found that vehicle emissions are the dominant contributor to carbonaceous particles in the city but do not represent the only source of these triterpenic compounds. Contrary to what has been observed in other studies, the Sigma hopane-to-EC ratios were higher in summer than in winter, suggesting that other factors (e.g. biomass burning, dust resuspension, and different fuels/engine technologies) prevail in relation to the photochemical decay of triterpenoid hydrocarbons from vehicle exhaustElsevierRCIPLOliveira, CesarMartins, NaterciaMirante, FátimaCaseiro, AlexandrePio, CasimiroMatos, ManuelSilva, HugoOliveira, CristinaCamões, Filomena2017-07-14T09:29:19Z2016-022016-02-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.21/7272engALVES, Celia A.[et al] - Road tunnel, roadside, and urban background measurements of aliphatic compounds in size-segregated particulate matter. Atmospheric Research. ISSN: 0169-8095. Vol. 168 (2016), pp.139-1480169-809510.1016/j.atmosres.2015.09.007metadata only accessinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-08-03T09:53:07Zoai:repositorio.ipl.pt:10400.21/7272Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:16:15.275721Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Road tunnel, roadside, and urban background measurements of aliphatic compounds in size-segregated particulate matter |
title |
Road tunnel, roadside, and urban background measurements of aliphatic compounds in size-segregated particulate matter |
spellingShingle |
Road tunnel, roadside, and urban background measurements of aliphatic compounds in size-segregated particulate matter Oliveira, Cesar Size-segregated particles Hopanes Alkanes Road tunnel Roadside Urban background |
title_short |
Road tunnel, roadside, and urban background measurements of aliphatic compounds in size-segregated particulate matter |
title_full |
Road tunnel, roadside, and urban background measurements of aliphatic compounds in size-segregated particulate matter |
title_fullStr |
Road tunnel, roadside, and urban background measurements of aliphatic compounds in size-segregated particulate matter |
title_full_unstemmed |
Road tunnel, roadside, and urban background measurements of aliphatic compounds in size-segregated particulate matter |
title_sort |
Road tunnel, roadside, and urban background measurements of aliphatic compounds in size-segregated particulate matter |
author |
Oliveira, Cesar |
author_facet |
Oliveira, Cesar Martins, Natercia Mirante, Fátima Caseiro, Alexandre Pio, Casimiro Matos, Manuel Silva, Hugo Oliveira, Cristina Camões, Filomena |
author_role |
author |
author2 |
Martins, Natercia Mirante, Fátima Caseiro, Alexandre Pio, Casimiro Matos, Manuel Silva, Hugo Oliveira, Cristina Camões, Filomena |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
RCIPL |
dc.contributor.author.fl_str_mv |
Oliveira, Cesar Martins, Natercia Mirante, Fátima Caseiro, Alexandre Pio, Casimiro Matos, Manuel Silva, Hugo Oliveira, Cristina Camões, Filomena |
dc.subject.por.fl_str_mv |
Size-segregated particles Hopanes Alkanes Road tunnel Roadside Urban background |
topic |
Size-segregated particles Hopanes Alkanes Road tunnel Roadside Urban background |
description |
Particulate matter samples were collected in a road tunnel in Lisbon (PM0.5, PM0.5-1, PM1-2.5, and PM2.5-10) and at two urban locations representing roadside and background stations (PM2.5 and PM2.5-10). Samples were analysed for organic and elemental carbon (OC and EC), n-alkanes, n-alkenes, hopanes, some isoprenoid compounds, and steranes. Particulate matter concentrations in the tunnel were 17-31 times higher than at roadside in the vicinity, evidencing an aerosol origin almost exclusively in fresh vehicle emissions. PM0.5 in the tunnel comprised more than 60% and 80% of the total OC and EC mass in PM10, respectively. Concentrations of the different aliphatic groups of compounds in the tunnel were up to 89 times higher than at roadside and 143 times higher than at urban background. Based on the application of hopane-to-OC or hopanes-to-EC ratios obtained in the tunnel, it was found that vehicle emissions are the dominant contributor to carbonaceous particles in the city but do not represent the only source of these triterpenic compounds. Contrary to what has been observed in other studies, the Sigma hopane-to-EC ratios were higher in summer than in winter, suggesting that other factors (e.g. biomass burning, dust resuspension, and different fuels/engine technologies) prevail in relation to the photochemical decay of triterpenoid hydrocarbons from vehicle exhaust |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-02 2016-02-01T00:00:00Z 2017-07-14T09:29:19Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.21/7272 |
url |
http://hdl.handle.net/10400.21/7272 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
ALVES, Celia A.[et al] - Road tunnel, roadside, and urban background measurements of aliphatic compounds in size-segregated particulate matter. Atmospheric Research. ISSN: 0169-8095. Vol. 168 (2016), pp.139-148 0169-8095 10.1016/j.atmosres.2015.09.007 |
dc.rights.driver.fl_str_mv |
metadata only access info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
metadata only access |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
|
_version_ |
1799133421996343296 |