School of Environment, and State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China.
Environ Pollut. 2012 Feb;161:215-21. doi: 10.1016/j.envpol.2011.10.014. Epub 2011 Nov 24.
Size-resolved particulate matter in the three size ranges (0.2-0.5 μm, 0.5-1.0 μm, and 1.0-2.5 μm) were collected at a roadside site in Beijing during and after the 2008 Olympic Games. The concentrations of PM mass, 14 elements, 3 major inorganic ions, and carbonaceous species were determined. The main contributors to PM(2.5) were crustal sources, vehicle emissions, secondary aerosol formation along with coal combustion, biomass from burning, and industrial processes, with vehicle emissions contributing more to roadside PM(2.5) than in the urban areas. The peaks at 0.5-1.0 μm in summer for PM mass and inorganic ions were most likely due to secondary aerosol formation, whereas the peaks at 0.2-0.5 μm in winter for PM mass and some elements were probably attributed to combustion from heating sources. The temporary control measures applied during the Olympics showed different effects on various emission sources and chemical species.
在北京的一个路边站点，在 2008 年奥运会期间和之后采集了三个粒径范围（0.2-0.5μm、0.5-1.0μm 和 1.0-2.5μm）的颗粒物，以解析粒径大小。测定了 PM 质量、14 种元素、3 种主要无机离子和碳质物质的浓度。PM(2.5)的主要贡献源为地壳源、车辆排放、燃煤和生物质燃烧以及工业过程中的二次气溶胶形成，车辆排放对路边 PM(2.5)的贡献大于城市地区。夏季 PM 质量和无机离子在 0.5-1.0μm 处出现峰值可能是由于二次气溶胶的形成，而冬季 PM 质量和一些元素在 0.2-0.5μm 处出现峰值可能归因于取暖源的燃烧。奥运会期间实施的临时控制措施对各种排放源和化学物质产生了不同的影响。
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