Source Apportionment and Toxic Potency of PM2.5-Bound Polycyclic Aromatic Hydrocarbons (PAHs) at an Island in the Middle of Bohai Sea, China

Polycyclic aromatic hydrocarbons (PAHs) have attracted more attention because of their high atmospheric concentration and toxicity in recent decades. In this study, a total 60 PM2.5 samples were collected from Beihuangcheng Island Bohai Sea, China, August 2017 to March 2018 for analyzing 16 congeners PAHs (Σ16PAHs). Sources apportioned by positive matrix factorization (PMF) model the carcinogenic risk due exposure was estimated equivalent BaP (BaPeq). The results showed that average Σ16PAHs 35.3 ± 41.8 ng/m3. maximum occurred winter, followed spring autumn, summer. PMF modeling into four sources, coal combustion, biomass burning, vehicle exhaust, petroleum release, contributing 43.1%, 25.8%, 24.7%, 6.39%, respectively. ΣBaPeq 2.32 4.95 ng/m3 during sampling period, exhaust largest contributor. finding indicates should be paid reduce emissions combustion they contributors PAH concentration,