Assessment of exposure to airborne ultrafine particles in the urban environment of Lisbon, Portugal

The aim of this study was the assessment of exposure to ultrafine in the urban environment of Lisbon, Portugal, due to automobile traffic, and consisted of the determination of deposited alveolar surface area in an avenue leading to the town center during late spring. This study revealed differentia...

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Bibliographic Details
Published in:Journal of the Air & Waste Management Association (1995) 2012-04, Vol.62 (4), p.373-380
Main Authors: Albuquerque, P.C., Gomes, J.F., Bordado, J.C.
Format: Article
Language:English
Subjects:
Air Pollutants - chemistry
Air pollution
Airborne particulates
Applied sciences
Assessments
Atmospheric pollution
Atoms & subatomic particles
Automobiles
Automotive engineering
Cities
Deposition
Environmental Exposure - analysis
Environmental Monitoring
Exact sciences and technology
Humans
Microscopy, Electron, Transmission
Particle Size
Particulate Matter - analysis
Pollution
Portugal
Studies
Surface chemistry
Time Factors
Towns
Traffic engineering
Traffic flow
Urban environments
Vehicle Emissions
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Summary:The aim of this study was the assessment of exposure to ultrafine in the urban environment of Lisbon, Portugal, due to automobile traffic, and consisted of the determination of deposited alveolar surface area in an avenue leading to the town center during late spring. This study revealed differentiated patterns for weekdays and weekends, which could be related with the fluxes of automobile traffic. During a typical week, ultrafine particles alveolar deposited surface area varied between 35.0 and 89.2 μm 2 /cm 3 , which is comparable with levels reported for other towns such in Germany and the United States. These measurements were also complemented by measuring the electrical mobility diameter (varying from 18.3 to 128.3 nm) and number of particles that showed higher values than those previously reported for Madrid and Brisbane. Also, electron microscopy showed that the collected particles were composed of carbonaceous agglomerates, typical of particles emitted by the exhaustion of diesel vehicles.
ISSN:1096-2247
2162-2906
DOI:10.1080/10962247.2012.658957