PM chemical composition and oxidative potential of the soluble fraction of particles at two sites in the urban area of Milan, Northern Italy

Recent epidemiological evidence support the hypothesis that health effects from inhalation of air particles are governed by more than just particle mass, since specific chemical components have been identified as important contributors to mortality and hospitality admissions. We studied the chemical...

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Bibliographic Details
Published in:Atmospheric environment (1994) 2016-03, Vol.128, p.104-113
Main Authors: Perrone, Maria Grazia, Zhou, Jun, Malandrino, Mery, Sangiorgi, Giorgia, Rizzi, Cristiana, Ferrero, Luca, Dommen, Josef, Bolzacchini, Ezio
Format: Article
Language:English
Subjects:
Chemical speciation
DCFH
DTT
Particulate matter
Redox activity
Urban area
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Summary:Recent epidemiological evidence support the hypothesis that health effects from inhalation of air particles are governed by more than just particle mass, since specific chemical components have been identified as important contributors to mortality and hospitality admissions. We studied the chemical composition and the oxidative potential (OP) of total suspended particle (TSP) samples from Milan at two sites with different traffic loads: a site in the low emission zone (LEZ) and a traffic site (TR) outside. Two a-cellular assays; dithiothreitol (OPDTT) and 2′,7' dichlorofluorescin (OPDCFH) were used to characterize the OP of the soluble fraction of particles. TSP samples from LEZ showed significantly lower concentrations of traffic-related chemical components compared to TR. The decrease in the concentrations from TR to LEZ was maximum for EC, with a LEZ/TR ratio of 0.64 (±0.18), and a significant reduction (p 
ISSN:1352-2310
1873-2844
DOI:10.1016/j.atmosenv.2015.12.040