Ions species size distribution in particulate matter associated with VOCs and meteorological conditions over an urban region.
Chemosphere
; 72(3): 496-503, 2008 Jun.
Article
em En
| MEDLINE
| ID: mdl-18440047
ABSTRACT
Airborne particulate matter (PM10, PM2.5, PM1) and volatile organic compounds (benzene, toluene, m,p-xylene, o-xylene) samples were collected during winter and summer seasons of 2005 at two sites, representing an urban and a suburban region of the Greater Athens Area. Urban site traffic emissions were the major contributor to the concentration of PM2.5, PM10, toluene, and xylenes, while benzene and PM1 concentrations were presented in significant spatial variations. K+, Na+, Mg2+, Ca2+, NO3-, Cl- and SO42- ions were analyzed for the chemical characterization of the collected PM samples. The results showed that Na+ cations and SO42- anions were the dominant species, during winter and summer, respectively, in both sites. The analysis of the synoptic scale and mesoscale atmospheric circulation during the experimental periods demonstrated that the meteorological conditions play a key role, not only in the variation but also in the distribution of the ionic concentrations at the three fractions of particulates and the dominant character (alkaline/acidic/neutral) of the particulates at the two sampling sites.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Monitoramento Ambiental
/
Poluentes Atmosféricos
/
Material Particulado
Tipo de estudo:
Risk_factors_studies
País/Região como assunto:
Europa
Idioma:
En
Revista:
Chemosphere
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Grécia