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论文类型：期刊论文

发表时间：2017-11-01

发表刊物：AEROSOL AND AIR QUALITY RESEARCH

收录刊物：SCIE、EI、Scopus

卷号：17

期号：11

页面范围：2867-2877

ISSN号：1680-8584

关键字：PM2.5; PAHs; Concentration; Source; Risk assessment

摘要：Polycyclic aromatic hydrocarbons (PAHs) in fine particulate matter (PM2.5) samples were analyzed at the top of Mount Tai in northern China from June to August of 2015. The mean concentration of PM2.5 was 54.94 mu g m(-3) (10-126 mu g m(-3)), and the mean concentration of PM2.5-bound PAHs was 1.359 ng m(-3) (0.296-5.349 ng m(-3)). Phe, Flu and IcdP were the three most abundant PAH species, with a mean concentration of 0.331, 0.128 and 0.100 ng m(-3), respectively. Particle phase organics were scavenged at the early stage of cloud/fog event, which cause a clear decrease in PAHs concentration. However, the concentration of PAHs increased after cloud/fog events since the liquid phase organics in clouds could be absorbed by particle phase organics. The results of PAHs levels used potential source contribution function, diagnostic ratio and principal component analysis suggested that significant contributions regions of PAHs at Mount Tai are the north (Hebei Province) and southeast (Henan Province) directions. Furthermore, vehicular emission, coal combustion and biomass combustion were the possible emission sources of PAHs. The estimated inhalation incremental lifetime cancer risk (ILCR) of three groups (Infants, Children, Adults) were less than 1 x 10(-6), with mean values of 2.49 x 10(-9), 1.14 x 10(-8) and 5.09 x 10(-8), respectively, suggesting the baseline of inhalation exposure values are acceptable in this present study.