Chemical Characterization Of Ambient
Suspended Particles In An Urban Area Affected
By Industrial Activities
Author(s)
A. V. Silva, S. M. Almeida, C. M. Oliveira & A. M. Miranda
Abstract
Urban areas are affected not only by road traffic but also by industrial activities
that are frequently located close to cities. As these areas contain large
concentrations of people, they exhibit both the highest levels of pollution and the
largest targets of impact. Several reports revealed significant correlations
between particulate matter (PM) levels and increased respiratory and
cardiovascular diseases or mortality. Consequently, understanding and
controlling air pollution in these areas is then important to identify mitigation
actions to improve the air quality.
The main objectives of this study were to perform a chemical characterization
of particulate matter (PM2.5 and PM2.5-10) sampled in Setúbal – Portugal, to
analyse seasonal trends and to identify sources and formation mechanisms of
particles.
PM2.5 and PM2.5-10 were collected in a monitoring station, classified as urban
traffic, in the winter and summer of 2011. Sampling was performed on a 12h
basis using a Gent sampler. The exposed nuclepore filters were measured by
gravimetry and cut into two parts: one for element characterization using
Instrumental Neutron Activation Analysis and the other for the water soluble
ions determination by Ion Chromatography.
Source apportionment was performed by integrating time variability, night
and day comparisons, enrichment factors, fine to coarse ratios and principal
Keywords
urban aerosols, PM, water soluble inorganic ions, trace elements
Related Book
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