Atmospheric BTEX and carbonyls during summer seasons of 2008–2010 in Beijing

Atmospheric BTEX and carbonyls during summer seasons of 2008–2010 in Beijing
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2008-2010年夏季北京大气苯系物和羰基化合物

DOI:
10.1016/j.atmosenv.2012.06.030
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发表时间:
2012-11
影响因子:
5
通讯作者:
Mellouki, Abdelwahid
Mellouki, Abdelwahid
中科院分区:
环境科学与生态学2区
文献类型:
--
作者:
Gao, Jian;Wang, Shulan;Chai, Fahe;Mellouki, Abdelwahid

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2008 - 2010年北京夏季大气羰基化合物和苯系物(苯、甲苯、二甲苯、间二甲苯、对二甲苯和邻二甲苯)的浓度进行了同步监测。在连续的夏季中,甲醛、乙醛和丙酮的总浓度分别为33.4 μg m−3、36.7 μg m− 3和48.6 μg m−3,远低于2005年夏季(58.4 μg m−3)和2006年夏季(77.4 μg m−3)。夏季的苯系物浓度分别为16 μg m−3、21.5 μg m− 3和15.4 μg m−3。夏季光化学反应对大气中甲醛和乙醛的最大贡献约为47.6- 60.3%。计算出北京夏季羰基化合物、苯系物和一氧化碳的平均臭氧生成潜势分别为166.1 μg m−3、65.4 μg m− 3和100.8 μg m−3。
The atmospheric concentrations of carbonyls and BTEX (benzene, toluene, ethylbenzene, m,p-xylene and o-xylene) were measured simultaneously in summers of Beijing from year 2008 to 2010. The total concentrations of formaldehyde, acetaldehyde and acetone in the consecutive summers, which were 33.4 μg m−3, 36.7 μg m−3and 48.6 μg m−3, respectively, were much lower than those reported in the summers of 2005 (58.4 μg m−3) and 2006 (77.4 μg m−3). The concentrations of BTEX in the summers were 16 μg m−3, 21.5 μg m−3and 15.4 μg m−3, respectively. The maximal contributions of photochemical reactions to atmospheric formaldehyde and acetaldehyde in the summers were estimated to be around 47.6–60.3%. The average ozone formation potentials (OFPs) for carbonyls and BTEX as well as carbon monoxide in summer of Beijing were calculated as 166.1 μg m−3, 65.4 μg m−3and 100.8 μg m−3, respectively.
北京环境空气中羰基化合物的季节和日变化
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