Size-segregated chemical composition of aerosol emissions in an urban road tunnel in Portugal
authors Pio, C; Mirante, F; Oliveira, C; Matos, M; Caseiro, A; Oliveira, C; Querol, X; Alves, C; Martins, N; Cerqueira, M; Camoes, F; Silva, H; Plana, F
nationality International
journal ATMOSPHERIC ENVIRONMENT
author keywords Road vehicle aerosol emissions; Road tunnel experiments; Aerosol size segregated composition; Carbonaceous aerosol; Trace elements; Soluble ions
keywords PARTICULATE MATTER EMISSIONS; TRACE-METAL CONCENTRATIONS; SECONDARY ORGANIC-CARBON; ON-ROAD; SOURCE APPORTIONMENT; STREET DUSTS; KAISERMUHLEN-TUNNEL; MOTOR-VEHICLES; MASS-BALANCE; HONG-KONG
abstract An 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 compounds were discriminated in the tunnel aerosol: carbonaceous, soil component and vehicle mechanical wear. Measurements indicate that Cu can be a good tracer for wear emissions of road traffic. Cu levels correlate strongly with Fe, Mn, Sn and Cr, showing a highly linear constant ratio in all size ranges, suggesting a unique origin through sizes. Ratios of Cu with other elements can be used to source apportion the trace elements present in urban atmospheres, mainly on what concerns coarse aerosol particles. (C) 2013 Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 1352-2310
year published 2013
volume 71
beginning page 15
ending page 25
digital object identifier (doi) 10.1016/j.atmosenv.2013.01.037
web of science category Environmental Sciences; Meteorology & Atmospheric Sciences
subject category Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
unique article identifier WOS:000318384900003
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