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Contributo in rivista
Tipo: Articolo in rivista
Titolo: Fine particulate-bound polycyclic aromatic hydrocarbons in vehicles in Rome, Italy
Anno di pubblicazione: 2017
Autori: Paola Romagnoli(1), Catia Balducci(1), Angelo Cecinato(1), Nunziata L'Episcopo(2),Claudio Gariazzo(2), Maria Pia Gatto(2), Andrea Gordiani(2), Monica Gherardi(2)
Affiliazioni autori: 1 - National Research Council of Italy, Institute of Atmospheric Pollution Research (CNR-IIA), Via Salaria km 29.3 - P.O. Box 10, I-00015,MonterotondoRM, Italy. 2 - INAIL, Department of Occupational Hygiene, Via F. Candida 1, 00040 Monte Porzio Catone RM, Italy.
Abstract: Urban commuters are exposed to elevated levels of air pollutants, especially in heavily polluted areas and traffic congested roads. In order to assess the contribution of commuting to citizens' exposure, measurements of fine particulate (PM2.5) and Polycyclic Aromatic Hydrocarbons (PAHs) were carried out in cars, buses and metro trains, within the LIFE+ EXPAH Project. Monitoring campaigns were performed in Rome, Italy, from April 2011 to August 2012. Inside the buses, the concentration of total PAHs ranged from 2.7 to 6.6 ng/m3 during the winter and from 0.34 to 1.51 ng/m3 in the summer. In cars, internal concentrations were in the range 2.2-7.3 and 0.46-0.82 ng/m3, respectively, in the two year time. Analogous differences between seasons were observed examining the benzo[a]pyrene-equivalent carcinogenicity. In the metro trains, total PAHs ranged from 1.19 to 2.35 ng/m3 and PM2.5 ranged from 17 to 31 µg/m3. The PM2.5 concentration in all transport modes ranged from 10 to 160 µg/m3 during the cold season and 15-48 µg/m3 during the warm time. The average inside-to-outside ratio (RI/O) was found to exceed 1.0 for PM2.5 only in buses, probably due to dust re-suspension caused by crowding and passenger activity. The molecular PAH signature suggests that vehicle emissions and biomass combustion were the major sources of commuters' exposure to these toxicants in Rome. According to linear regression analysis, the PAH concentrations inside the vehicles were linked to those detected outside. Statistically significant differences (p<0.05) were found between the in-vehicle locations and the urban pollution network stations, with higher PAH values detected, on the average, in these latter.
Lingua abstract: inglese
Environmental Science and Pollution Research
Referee: Sì: Internazionale
Stato della pubblicazione: Published version
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