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Title: Study of the occurrence of airborne Polycyclic Aromatic Hydrocarbons associated with respirable particles in two coastal cities at Eastern Mediterranean: Levels, source apportionment, and potential risk for human health
Authors: Iakovides, Minas 
Stephanou, Euripides 
Apostolaki, Maria 
Hadjicharalambous, Marios 
Evans, John S. 
Koutrakis, Petros 
Achilleos, Souzana 
Major Field of Science: Medical and Health Sciences
Field Category: Health Sciences
Keywords: Polycyclic Aromatic Hydrocarbons;PAHs;PM2.5;PM10;Eastern Mediterranean;Source apportionment;PCA/MLR;UNMIX;ILCR
Issue Date: 15-Sep-2019
Source: Atmospheric Environment, 2019, vol. 213, pp. 170-184
Volume: 213
Start page: 170
End page: 184
Journal: Atmospheric Environment 
Abstract: Polycyclic Aromatic Hydrocarbons (PAHs) are one of the most hazardous substances in the environment. Although their occurrence and fate in the atmosphere of Eastern Mediterranean is well documented, there is limited information on PAH levels in the inhalable aerosol fraction. Additionally, to the best of our knowledge, there is lack of information on particulate matter with aerodynamic diameter equal or less than 2.5 and 10 μm (PM2.5/PM10)-bound PAH concentrations and sources in Cyprus. We therefore present the first study that i) determines the concentration levels of PAHs in the respirable and inhalable (PM2.5 and PM10) fraction of particulate matter; ii) identifies, quantifies, and compares PAH emission sources by applying two receptor models (Principal Components Analysis/Multiple Linear Regression Analysis, PCA/MLR; and UNMIX factorization), and iii) assesses their relative toxicity at two different coastal sites in Eastern Mediterranean (Island of Crete, Greece; and Cyprus). For this purpose, a total of 79 samples were collected in Heraklion (Island of Crete) and Limassol (Cyprus) during a 2-year sampling campaign between 2012 and 2014. Thirty five PAH members were identified and the total concentration (Σ35PAHs) levels in PM2.5 ranged between 0.15 and 9.19 ng/m3 in Heraklion; 0.12 and 3.91 ng/m3 (PM2.5), and 0.16 and 4.02 ng/m3 (PM10) in Limassol. PAH concentrations were the highest when air masses were passing over highly polluted areas, such as the eastern Balkan Peninsula/Adriatic Sea and northern Greece. The most abundant members at both sites were Benzo[b]fluoranthene (7–16%), Benzo[e]pyrene (8–11%), Indeno[1,2,3-cd]pyrene (10–18%) and Benzo[ghi]perylene (9–21%); as well as Anthranene (5–6%) and Coronene (9–11%) in Limassol. The major PAH emission sources obtained from the application of PCA/MLRA were gasoline and diesel/coal combustion sources, accounting for almost 60% and 40% of total contribution in Heraklion, while in Limassol both sources contributed nearly equally (51% and 49%, respectively). Similar findings were obtained using the UNMIX model. The lifetime incremental cancer risk (ILCR) due to both inhalation and ingestion exposure from particulate PAHs was well below the U.S. EPA regulatory threshold in both study areas.
ISSN: 1352-2310
DOI: 10.1016/j.atmosenv.2019.05.059
Rights: © Elsevier
Type: Article
Affiliation : The Cyprus Institute 
University of Crete 
Cyprus University of Technology 
Harvard University 
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