Laboratory of Basin Hydrology and Wetland Eco-restoration, School of Environmental Studies, China University of Geosciences, Wuhan 430078, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430078, China; School of Environmental Science and Engineering, Hubei key Laboratory of Mine Environmental Pollution Control and Remediation, Hubei Polytechnic University, Huangshi 435003, China.
State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430078, China; School of Environmental Science and Engineering, Hubei key Laboratory of Mine Environmental Pollution Control and Remediation, Hubei Polytechnic University, Huangshi 435003, China.
J Environ Sci (China). 2020 Nov;97:1-10. doi: 10.1016/j.jes.2020.04.011. Epub 2020 May 30.
Variations of levels, possible source and air mass transmission were investigated for 16 USEPA priority-controlled PAHs in PM during 2018 Chinese Spring Festival (CSF) in Xiangyang City, central China which is the North-South pollutant airmass transport channel of China. Totally 37 samples were collected. Mass concentrations of ΣPAHs for the Pre-CSF day (Pre-CSFD), during the CSF day (CSFD) and after the CSF day (Af-CSFD) are 33.78 ± 17.68 ng/m, 22.98 ± 6.49 ng/m, and 8.99 ± 4.44 ng/m, respectively. High resolution samples showed that ΣPAHs are higher in the morning (06:00-11:00) or afternoon (11:30-16:30), than those in the evening (17:00-22:00) and at night (22:30-05:30), whereas the result is reversed during the CSFD. Fireworks burning can obviously increase the mass concentration of PAHs. Air mass trajectory indicated that Xiangyang is a sink area of pollutants for northwest and southeast, and the sources of the northeast and southwest. The air mass only can be transmitted out through northeast and southwest. It is effective for improvement of air quality in Wuhan and Hunan to control fireworks emission in Henan and local areas. Fireworks burning was an important source for PAHs during CSFD, biomass, coal combustion, and traffic emission were the main sources of PAHs for Pre-CSFD and Af-CSFD periods. The health risk on the CSFD was higher than the acceptable levels, especially during the intensive fireworks burning, the risk value far exceed 1.0 × 10, controlling burning fireworks is required.
研究了 2018 年中国春节期间（CSF）襄阳市（中国南北污染物气团传输通道）大气细颗粒物（PM）中 16 种美国环保署优先控制的多环芳烃（PAHs）的浓度变化、可能来源和空气团传输。共采集了 37 个样本。CSF 前一天（Pre-CSFD）、CSF 期间（CSFD）和 CSF 后一天（Af-CSFD）的 ΣPAHs 质量浓度分别为 33.78 ± 17.68 ng/m、22.98 ± 6.49 ng/m 和 8.99 ± 4.44 ng/m。高分辨率样本表明，ΣPAHs 在早晨（06:00-11:00）或下午（11:30-16:30）较高，而在傍晚（17:00-22:00）和夜间（22:30-05:30）较低，而 CSFD 期间的结果则相反。烟花燃烧明显增加了 PAHs 的质量浓度。轨迹分析表明，襄阳是西北和东南方向污染物的汇区，也是东北和西南方向污染物的源区。气团只能通过东北和西南传输出去。控制河南和当地的烟花排放，对改善武汉和湖南的空气质量是有效的。烟花燃烧是 CSFD 期间 PAHs 的重要来源，生物质、煤炭燃烧和交通排放是 Pre-CSFD 和 Af-CSFD 期间 PAHs 的主要来源。CSFD 期间的健康风险高于可接受水平，特别是在密集的烟花燃烧期间，风险值远远超过 1.0×10，需要控制烟花燃烧。
