标题：Polycyclic Aromatic Hydrocarbons in AtmosphericPM2.5 during Winter Haze in Huang-gang, CentralChina: Characteristics, Sources and Health RiskAssessment
出版社：Chinese Association for Aerosol Research in Taiwan
摘要：Levels, compositions, sources and health risk of PM2.5-bound PAHs were measured at a regionalmonitoring site of Huang-gang in the winter of 2018. Samples were collected every morning,afternoon, evening and late night (LN). The average concentrations of PM2.5 and PAHs were 110.4± 48.3 µg m–3and 25.6 ± 12.0 ng m–3, respectively. The concentration of PM2.5 was in the orderof evening > morning > afternoon > LN, while PAHs concentration was in the order of evening >LN > morning > afternoon. According to PM2.5 concentration and its changing trend, the haze canbe divided into three stages: early (low concentration, January 13–15, EHZ), medium (highconcentration, January 16–22, MHZ) and late (concentration decreased rapidly, January 23–24,LHZ). A positive correlation (P < 0.01) was observed between PM2.5 and ∑16PAHs concentration onlyin MHZ. Besides, PAHs concentration was positively related to NOx concentration, CO concentrationand temperature but negatively correlated with RH, independent of O3 concentration. The ratiosof OC/EC indicated that the secondary aerosol had a great influence on the formation of haze.Three sources of PAHs including traffic emission, coal combustion and biomass combustion wereextracted and quantified, accounting for 54.4%, 13.3% and 32.3% of PAHs, respectively. Potentialsource contribution function (PSCF) and concentration weighted trajectory (CWT) indicated thetransmission of PM2.5 from Wuhan and local pollutant emission were crucial to the formation ofhaze. BaPeq concentration combined with ILCR values was used to evaluate health risk and theresults showed this haze had potential health risk to both adults and children.
