Characteristics of PM2.5 pollutionin winter and spring of Beijing during 2009~2010
GU Fang-ting, Hu Min, WANG Yu, LI Meng-ren, GUO Qing-feng, WU Zhi-jun
State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
A comprehensive measurement was conducted to investigate thecharacteristics of particulate matter (PM) pollution in winter and spring of Beijing. 24-hour particle samples were collected from December to May, 2009~2010, and the chemical compositions of PM2.5 were analyzed. The average PM2.5 massconcentrations were (84.97±68.98)μg/m3 and (65.25±45.76) μg/m3 in winter and spring, respectively. Secondary inorganic aerosols, i.e. sulfate, nitrate, andammonium (SNA), and secondary organic aerosols (SOA) were dominant theparticulate matter, with the total fraction (SNA+SOA) of 49% and 47% in winter and spring, respectively. Due to the largesource emissionand unfavorable meteorological conditions such as low temperature, low wind speed, and high relative humidity; the contributions of secondary inorganic aerosols (NH4+、NO3-、SO42-) were enhanced during thepolluted days, and the nitratewas more enhanced on polluted days. The SOA was always the most importantorganic aerosolcomponentcontributedto PM2.5 in winter and spring. The contribution ofprimary organicaerosolsalso increased due tothe stagnant meteorological condition on polluted days.
顾芳婷, 胡敏, 王渝, 李梦仁, 郭庆丰, 吴志军. 北京2009~2010年冬、春季PM2.5污染特征[J]. 中国环境科学, 2016, 36(9): 2578-2584.
GU Fang-ting, Hu Min, WANG Yu, LI Meng-ren, GUO Qing-feng, WU Zhi-jun. Characteristics of PM2.5 pollutionin winter and spring of Beijing during 2009~2010. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(9): 2578-2584.
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