期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 191, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2020.110219
关键词
PM2.5; PAHs; Source identification; Health risk assessment
资金
- National Key Research and Development Program of China [2017YFCO212603]
- National Natural Science Foundation of China [41773124]
- Open Research Program of Laboratory of Basin Hydrology and Wetland Ecorestoration, China University of Geosciences [BHWER201503A]
- Open Research Fund of Hubei Key Laboratory of Mine Environmental Pollution Control & Remediation, Hubei Polytechnic University [201702]
- Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan) [CUGL170208]
Characterization and source identification of PM2.5 bound polycyclic aromatic hydrocarbons (PAHs) are conducted in urban Wuhan (WH), suburban Pingdingshan (PDS), and rural Suizhou (SZ) in China during summer harvest. This study analyzes 16 priority PAHs with 38 PM2.5 samples in June. PAHs had similar physical-chemical properties like polychlorinated biphenyls (PCBs) and organochlorine pesticides (OCPs), which had been listed as Priority Pollutants. The concentration and detection frequency of OCPs and PCBs were considerably lower than those of PAHs in PM2.5. Results indicate that PDS adjoining the highway has the highest PM2.5-bound PAHs. SZ possesses the lowest concentration of PAHs. Principal component analysis and multivariate linear regression model and molecular diagnostic ratio distinguish the sources. Vehicle emissions and coal combustion are extracted in three sites, while the source of PDS also includes gas combustion. SZ was affected by gas combustion and petroleum. The potential source contribution function and the concentration-weighted trajectory track the potential pollution area. The sampling places might be affected by the local sources and short distance transmission cannot be neglected. The incremental lifetime cancer risks (ILCRs) model evaluates the exposure risk of PAHs. According to the ILCR model, WH and PDS are exposed to harmful PAHs. By contrast, SZ is a substantially safe place.
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