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Characteristic of daily total exposure to polycyclic aromatic hydrocarbons of people living in coal-fired area in Qujing, Yunnan Province |
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Abstract To assess polycyclic aromatic hydrocarbons(PAHs) exposure, subjects were selected in the area where local residents burn smoky coals in Qujing, Yunnan province. 16 PAHs concentrations of the samples were determined by GC/MS to study status, characteristic and sources of the PAHs. Daily total exposure of local people was analyzed using benzo(a)pyrene (BaP) toxic equivalence factor. Daily intake through food was 0.20μg/d, which was in the range of the data reported by WHO. Daily intake through air was 5.26μg/d, which contributed 96% of the their daily PAHs exposure. Inhalation was the main intake of PAHs. The proportion of the high molecular weight PAHs increased from 3.08% to 49.6% using toxic equivalence factor to assess the carcinogenic risk, while low molecular weight PAHs exhibited much lower toxicity decreased. The daily total exposure to BaP was 5.46μg/d, which was exceeded the limited value 3μg/d. PAHs exposure posed long-term threat to the environment and health of residents.
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Received: 05 February 2010
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ZHANG Li, ZHANG Yuan, QI Shi-Hua, LI Hui, XING Xin-Li, ZHANG Ze-Zhou, ZHENG Huang, SUN Yan, MIN Yang. Characteristics of atmospheric PM2.5 and the variation of PAHs in PM2.5 during spring in Hongshan district, Wuhan[J]. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(8): 2319-2325. |
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