Abstract:The air pollution characteristics during the Spring Festival in Lanzhou were investigated. Measurements for particles in the size range 0.5 to 20 μm were taken using a TSI particle sizer from 25th January to 18th February, 2011 in urban Lanzhou. Elevated particle concentrations were observed from 3rd to 8th February, 2011 due to the firework burning. The result showed that the most affected periods by fireworks burning were 00:00~01:00 and 21:00~22:00 on 3rd February 2011. During 00:00~01:00 on 3rd February, the average particle number, surface area and volume concentrations in the size range 0.5~20μm were (310.3±97.2)/cm3, (1061.6±396.0)μm2/cm3 and (409.9±176.0) μm3/cm3, respectively, which were 6.10, 7.72 and 9.93 times higher than that in normal days during the Spring Festival. The firework emissions affected particle concentration in different sizes with different extent. For number and volume concentrations, the most affected size range was 0.542~1.382μm and 3.278~8.354μm, respectively, while for surface area concentrations, the most affected size range were 0.542~1.981μm and 3.278~8.354μm. The volume median diameters for particle volume size distributions in normal days appeared most frequently around 0.85μm and 5.50μm, while that affected by fireworks appeared most frequently around 0.93μm and 5.50μm, indicating the growth of accumulation particles during fireworks burning.
赵素平, 余晔, 何建军, 刘娜, 陈晋北, 陈星. 兰州市2011年春节期间颗粒物浓度及其谱分布特征[J]. 中国环境科学, 2012, 32(11): 1939-1947.
ZHAO Su-Ping, YU Ye, HE Jian-Jun, LIU Na, CHEN Jin-Bei, CHEN Xing. Concentration and size distribution of aerosol particles during 2011 Spring Festival in Lanzhou. CHINA ENVIRONMENTAL SCIENCECE, 2012, 32(11): 1939-1947.