Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing, 100124, China.
Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing, 100124, China; Collaborative Innovation Center of Electric Vehicles in Beijing, Beijing, 100081, China.
Environ Pollut. 2018 Jul;238:491-499. doi: 10.1016/j.envpol.2018.03.073. Epub 2018 Mar 30.
In this study, the measurement of volatile organic compounds (VOCs) was conducted at Beijing Capital International Airport (ZBAA) and a background reference site in four seasons of 2015. Total concentrations of VOCs were 72.6 ± 9.7, 65.5 ± 8.7, 95.8 ± 11.0, and 79.2 ± 10.8 μg/m in winter, spring, summer, and autumn, respectively. The most abundant specie was toluene (10.1%-17.4%), followed by benzene, ethane, isopentane, ethane, acetylene, and n-butane. Seasonal variations of VOCs were analyzed, and it was found that the highest concentration occurring in summer, while the lowest in spring. For the diurnal variation, the concentration of VOCs in the daytime (9:00-15:00) was less than that at night (15:00-21:00) obviously. Ozone Formation Potential (OFP) was calculated by using Maximum Incremental Reactivity (MIR) method. The greatest contribution to OFP from alkenes and aromatics, which accounted for 27.3%-51.2% and 36.6%-58.6% of the total OFP. The WRF-CMAQ model was used to simulate the impact of airport emissions on the surrounding area. The results indicated that the maximum impact of VOCs emissions and all sources emissions at the airport on O was 0.035 and -23.8 μg/m, respectively. Meanwhile, within 1 km from the airport, the concentration of O around the airport was greatly affected by airport emitted.
本研究于 2015 年四个季节在北京首都国际机场（ZBAA）和一个背景参考点测量了挥发性有机化合物（VOCs）。VOCs 的总浓度分别为冬季 72.6±9.7、春季 65.5±8.7、夏季 95.8±11.0 和秋季 79.2±10.8μg/m3。最丰富的物种是甲苯（10.1%-17.4%），其次是苯、乙烷、异戊烷、乙烷、乙炔和正丁烷。分析了 VOCs 的季节性变化，发现夏季浓度最高，春季最低。对于日变化，VOCs 浓度在白天（9:00-15:00）明显低于夜间（15:00-21:00）。采用最大增量反应性（MIR）方法计算臭氧生成潜势（OFP）。烯烃和芳烃对 OFP 的贡献最大，分别占总 OFP 的 27.3%-51.2%和 36.6%-58.6%。利用 WRF-CMAQ 模型模拟了机场排放对周边地区的影响。结果表明，机场 VOCs 排放和所有源排放对 O 的最大影响分别为 0.035 和-23.8μg/m3。同时，在距机场 1km 范围内，机场周围 O 的浓度受到机场排放的极大影响。
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