Polycyclic arom. hydrocarbons (PAH) and nitrated polycyclic arom. hydrocarbons (nitro-PAH) were identified in airborne particulate matter and soil. For air sampling, a 6-stage cascade impactor was located in an urban area (Catania, Italy) recognized for its high traffic vol. Soil samples were collected every 1.5 km from beneath the grass by the side of the median of a Catania road along its full length (8.2 km). High performance liq. chromatog. in electrochem.-fluorescence detection mode was used to selectively sep., identify, and quantify analytes in air and soil, providing good selectivity and sensitivity. Seasonal trends, urban traffic effects, and source profiles are discussed. Higher PM10 concns. were obsd. in summer (43 μg/m3) vs. winter (24 μg/m3). PAH contained in PM10 were higher in winter (0.48 ng/m3 fluoranthene) vs. summer (0.14 ng/m3 fluoranthene). Anal. of size-segregated urban particulate matter showed the amt. of PM0.5 (stage 6) was always higher than the amt. of other particles (stages 1-5). PM0.5 was always higher in summer (∼40%, m/m) vs. winter (∼30%, m/m). The amts. of PAH and nitro-PAH in PM0.5 (stage 6) were always higher, by a max. of 1 order of magnitude, than that of other particles (stages 1-5). This result is crucial because ultra-fine particles have a tendency to move into the blood through the alveolar epithelial barrier. Air and soil pollution levels agreed with those obsd. in other cities with similar pollution levels.
The PAH and Nitro-PAH Concentration Profiles in Size-Segregated Urban Particulate Matter and Soil in Traffic-Related Sites in Catania, Italy
DE GUIDI, Guido;PERRINI, Giancarlo;
2012-01-01
Abstract
Polycyclic arom. hydrocarbons (PAH) and nitrated polycyclic arom. hydrocarbons (nitro-PAH) were identified in airborne particulate matter and soil. For air sampling, a 6-stage cascade impactor was located in an urban area (Catania, Italy) recognized for its high traffic vol. Soil samples were collected every 1.5 km from beneath the grass by the side of the median of a Catania road along its full length (8.2 km). High performance liq. chromatog. in electrochem.-fluorescence detection mode was used to selectively sep., identify, and quantify analytes in air and soil, providing good selectivity and sensitivity. Seasonal trends, urban traffic effects, and source profiles are discussed. Higher PM10 concns. were obsd. in summer (43 μg/m3) vs. winter (24 μg/m3). PAH contained in PM10 were higher in winter (0.48 ng/m3 fluoranthene) vs. summer (0.14 ng/m3 fluoranthene). Anal. of size-segregated urban particulate matter showed the amt. of PM0.5 (stage 6) was always higher than the amt. of other particles (stages 1-5). PM0.5 was always higher in summer (∼40%, m/m) vs. winter (∼30%, m/m). The amts. of PAH and nitro-PAH in PM0.5 (stage 6) were always higher, by a max. of 1 order of magnitude, than that of other particles (stages 1-5). This result is crucial because ultra-fine particles have a tendency to move into the blood through the alveolar epithelial barrier. Air and soil pollution levels agreed with those obsd. in other cities with similar pollution levels.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
