Duan Jing-Chun, Peng Yan-Chun, Tan Ji-Hua, Hao Ji-Ming, Chai Fa-He
Huan Jing Ke Xue. 2013 Dec;34(12):4552-7.
NMHCs and NOx samples were simultaneously collected and analyzed in six urban and suburban representative sampling sites (Sihuan, Tian'anmen, Pinguoyuan, Fatou, Beijing Airport and Miyun) during a typical haze period in winter 2005, Beijing. The concentrations of NMHCs during the sampling period in descending order were: Sihuan (1101.29 microg x m(-3)) > Fatou (692.40 microg x m(-3)) >Tian'anmen (653.28 microg x m(-3)) >Pinguoyuan (370.27 microg x m(-3)) > Beijing Airport (350.36 microg x m(-3)) > Miyun (199.97 microg x m(-3)). Atmospheric benzene pollution in Beijing was rather serious. The ratio of NMHCs/NOx ranged from 2.1 to 6.3, indicating that the peak ozone concentrations in urban Beijing were controlled by VOCs during the sampling period. Analysis of propylene equivalent concentration and ozone formation potential showed that the NMHCs reactivity descended in the order of Sihuan > Fatou > Tian'anmen > Pinguoyuan > Beijing Airport > Miyun. B/T values (0.52 to 0.76) indicated that besides motor vehicle emission, coal combustion and other emission sources were also the sources of NHMCs in Beijing in winter. The spatial variations of isoprene in Beijing indicated that the contribution of anthropogenic sources to isoprene increased and the emissions by biogenic sources decreased in winter. The spatial variations of propane and butane indicated that LPG emissions existed in the urban region of Beijing.
2005年冬季北京典型雾霾期间，在六个城市和郊区代表性采样点（四环、天安门、苹果园、垡头、北京机场和密云）同时采集并分析了非甲烷烃（NMHCs）和氮氧化物（NOx）样本。采样期间非甲烷烃浓度由高到低依次为：四环（1101.29微克·立方米⁻³）＞垡头（692.40微克·立方米⁻³）＞天安门（653.28微克·立方米⁻³）＞苹果园（370.27微克·立方米⁻³）＞北京机场（350.36微克·立方米⁻³）＞密云（199.97微克·立方米⁻³）。北京大气苯污染相当严重。非甲烷烃与氮氧化物的比值在2.1至6.3之间，表明采样期间北京城区臭氧浓度峰值受挥发性有机物（VOCs）控制。丙烯当量浓度和臭氧生成潜势分析表明，非甲烷烃反应活性由高到低依次为：四环＞垡头＞天安门＞苹果园＞北京机场＞密云。B/T值（0.52至0.76）表明，冬季北京非甲烷烃的来源除机动车排放外，煤炭燃烧等其他排放源也是其来源。北京异戊二烯的空间变化表明，冬季人为源对异戊二烯的贡献增加，生物源排放减少。丙烷和丁烷的空间变化表明，北京城区存在液化石油气排放。
