14 documents found, page 1 of 2
Road tunnel, roadside, and urban background measurements of aliphatic compounds...
Oliveira, Cesar; Martins, Natercia; Mirante, Fátima; Caseiro, Alexandre; Pio, Casimiro; Matos, Manuel; Silva, Hugo; Oliveira, Cristina; Camões, FilomenaParticulate 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 highe...
Size fractionated aerosol composition at roadside and background environments i...
Mirante, Fátima; Salvador, Pedro; Pio, Casimiro; Alves, Célia; Artiñano, Begoña; Caseiro, Alexandre; Revuelta, M. AranzazuThe chemical composition of size-segregated particulate matter (PM) was studied during summer and winter sampling campaigns, at two different urban sites (roadside and urban background) in the city of Madrid, Spain. PM was sampled with high volume cascade impactors, in 4 size ranges: 10-2.5, 2.5-1, 1-0.5 and <0.5??m. The carbonaceous content (OC and EC) was determined by a thermo-optical method, whilst the wate...
Size-segregated chemical composition of aerosol emissions in an urban road tunn...
Pio, Casimiro; Mirante, Fátima; Oliveira, Cesar; Matos, Manuel; Caseiro, Alexandre; Oliveira, Cristina; Querol, Xavier; Alves, Célia; Martins, NatérciaAn atmospheric aerosol study was performed in 2008 inside an urban road tunnel, in Lisbon, Portugal. Using a high volume impactor, the aerosol was collected into four size fractions (PM0.5, PM0.5-1, PM1-2.5 and PM2.5-10) and analysed for particle mass (PM), organic and elemental carbon (OC and EC), polycyclic aromatic hydrocarbons (PAH), soluble inorganic ions and elemental composition. Three main groups of com...
Size-segregated chemical composition of aerosol emissions in an urban road tunn...
Pio, Casimiro; Mirante, Fátima; Oliveira, César João Santos; Matos, Manuel; Caseiro, Alexandre; Oliveira, Cristina; Querol, Xavier; Alves, CéliaAn atmospheric aerosol study was performed in 2008 inside an urban road tunnel, in Lisbon, Portugal. Using a high volume impactor, the aerosol was collected into four size fractions (PM0.5, PM0.5–1, PM1–2.5 and PM2.5–10) and analysed for particle mass (PM), organic and elemental carbon (OC and EC), polycyclic aromatic hydrocarbons (PAH), soluble inorganic ions and elemental composition. Three main groups of com...
Size-segregated chemical composition of aerosol emissions in an urban road tunn...
Pio, Casimiro; Mirante, Fatima; Oliveira, Cesar; Matos, Manuel; Caseiro, Alexandre; Oliveira, Cristina; Querol, Xavier; Alves, Celia; Martins, NaterciaAn atmospheric aerosol study was performed in 2008 inside an urban road tunnel, in Lisbon, Portugal. Using a high volume impactor, the aerosol was collected into four size fractions (PM0.5, PM0.5-1, PM1-2.5 and PM2.5-10) and analysed for particle mass (PM), organic and elemental carbon (OC and EC), polycyclic aromatic hydrocarbons (PAH), soluble inorganic ions and elemental composition. Three main groups of com...
Variations in wood burning organic marker concentrations in the atmospheres of ...
Caseiro, Alexandre; Oliveira, César João SantosThe particulate emissions from biomass burning are a growing concern due to the recent evidence of their ubiquitous and important contribution to the ambient aerosol load. A possible strategy to apportion the biomass burning share of particulate matter is the use of organic molecular tracers. Anhydrosugars (levoglucosan, mannosan and galactosan), together with two organic acids (dehydroabietic and pimaric acids...
Burn wood influence on outdoor air quality in a small village: Foros de Arrão, ...
Canha, N.; Freitas, M. C.; Almeida-Silva, M.; Almeida, S. M.; Dung, H. M.; Dionísio, I.; Cardoso, J.; Pio, C. A.; Caseiro, Alexandre; Verburg, T. G.One Plus Sequential Air Sampler—Partisol was placed in a small village (Foros de Arra ˜o) in central Portugal to collect PM10 (particles with an aerodynamic diameter below 10 lm), during the winter period for 3 months (December 2009–March 2010). Particles masses were gravimetrically determined and the filters were analyzed by instrumental neutron activation analysis to assess their chemical composition. The wate...
Indoor and outdoor characterisation of organic and inorganic compounds in city ...
Pegas, P. N.; Nunes, T.; Alves, C. A.; Silva, J. R.; Vieira, S. L. A.; Caseiro, Alexandre; Pio, C. A.Pollutants inside school buildings may affect children's health and influence learning performance and attendance. This study investigated pollutant concentrations inside and outside school buildings at different locations (city centre and suburban) in Aveiro, Portugal, between April and June 2010. The aim was to evaluate simultaneously comfort parameters (temperature, relative humidity, CO2 and CO) and indoor ...
Variations in wood burning organic marker concentrations in the atmospheres of ...
Caseiro, Alexandre; Oliveira, CésarThe particulate emissions from biomass burning are a growing concern due to the recent evidence of their ubiquitous and important contribution to the ambient aerosol load. A possible strategy to apportion the biomass burning share of particulate matter is the use of organic molecular tracers. Anhydrosugars (levoglucosan, mannosan and galactosan), together with two organic acids (dehydroabietic and pimaric acids...
Summer 2009 wildfires in Portugal: Emission of trace gases and aerosol composition
Alves, Célia; Vicente, Ana; Nunes, Teresa; Gonçalves, Cátia; Fernandes, Ana Patrícia; Mirante, Fátima; Tarelho, Luís; Campa, Ana M. SánchezIn summer 2009, emissions of trace gases and aerosols from several wildfires occurring in Portugal were sampled. A portable high-volume sampler was used to collect sequentially, on quartz fibre filters, coarse (PM2.5–10) and fine (PM2.5) smoke particles. Tedlar air sampling bags have been used for complementary chemical characterisation of the gaseous phase. The carbonaceous content (elemental and organic carbo...