Seasonal Distribution Characteristics, Source Analysis, and Health Risk Evaluation of PAHs in PM2.5 in Chengde

被引：0

作者：

He B.-W. ^{[1
]}

Nie S.-S. ^{[1
]}

Li Y.-L. ^{[1
]}

Guo R.-Y. ^{[1
]}

Yao B. ^{[1
]}

Cui J.-S. ^{[1
]}

Feng Y.-P. ^{[2
]}

Wang S. ^{[3
]}

Hou X.-S. ^{[1
]}

机构：

[1] School of Environmental Science and Engineering, Hebei University of Science and Technology, Shijiazhuang

[2] Chengde Center for Disease Control and Prevention, Chengde

[3] Hebei Yuhong Environmental Protection Technology Co. Ltd., Shijiazhuang

来源：

Huanjing Kexue/Environmental Science | 2022年 / 43卷 / 05期

关键词：

Health risk assessment; PM[!sub]2.5[!/sub; Polycyclic aromatic hydrocarbons(PAHs); Positive matrix factorization(PMF); Seasonal distribution characteristics; Source analysis;

D O I：

10.13227/j.hjkx.202108224

中图分类号：

学科分类号：

摘要：

In order to study the seasonal variation characteristics and pollution sources of polycyclic aromatic hydrocarbons (PAHs) in PM2.5 in Chengde, PM2.5 samples were collected in January, April, July, and October 2019, and the concentrations of 16 PAHs were determined using gas chromatography-mass spectrometry (GC-MS). In addition, the health risks of PAHs were evaluated by using the BaP toxicity equivalent method (BaPTeq) and incremental lifetime carcinogenic risk (ILCR) model based on PAHs and PMF results. The results showed that the variation in ρ(PAHs) in PM2.5 in Chengde during the sampling period ranged from 2.7 to 246.4 ng•m-3, and a significant seasonal characteristic was observed, that is (136.8±52.1) ng•m-3 (winter)>(70.3±36.7) ng•m-3 (autumn)>(24.7±17.4) ng•m-3 (spring)>(13.7±9.4) ng•m-3 (summer). For the percentage of PAHs with different ring numbers in the total PAHs mass concentration, 5-6 ring PAHs were the dominant components in four seasons, 2-3 ring PAHs were of smaller proportion, and 4 ring PAHs were of the highest percentage in winter (37.63%). The contribution of crude oil and petroleum volatile spill emissions to PAHs was relatively high in spring and summer, and coal and biomass combustion emission sources were absolutely dominant in autumn and winter. BaPTeq concentrations showed that winter>autumn>spring>summer. ILCR models pointed out that adults had higher respiratory exposure risk than that in children, and adults had different degrees of carcinogenic risk in spring and autumn and winter, whereas children had some degree of carcinogenic risk only in winter, and the variation in ILCR in all four seasons for both adults and children was ranked winter>autumn>spring>summer. © 2022, Science Press. All right reserved.

引用

页码：2343 / 2354

页数：11

共 60 条

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