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Atmospheric BTEX and carbonyls during summer seasons of 2008–2010 in Beijing
Abstract 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−3 and 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−3 and 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−3 and 100.8 μg m−3, respectively.
Highlights ► The atmospheric carbonyls and BTEX during summer seasons of 2008–2010 were reported. ► The yearly variations and sources origination of carbonyls and BTEX were analyzed. ► The OFPs of the pollutants were estimated and compared. ► The OFP of CO accounted for the largest proportion as individual species.
Atmospheric BTEX and carbonyls during summer seasons of 2008–2010 in Beijing
Abstract 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−3 and 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−3 and 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−3 and 100.8 μg m−3, respectively.
Highlights ► The atmospheric carbonyls and BTEX during summer seasons of 2008–2010 were reported. ► The yearly variations and sources origination of carbonyls and BTEX were analyzed. ► The OFPs of the pollutants were estimated and compared. ► The OFP of CO accounted for the largest proportion as individual species.
Atmospheric BTEX and carbonyls during summer seasons of 2008–2010 in Beijing
Zhang, Yujie (author) / Mu, Yujing (author) / Liang, Peng (author) / Xu, Zhu (author) / Liu, Junfeng (author) / Zhang, Hongxin (author) / Wang, Xiaoke (author) / Gao, Jian (author) / Wang, Shulan (author) / Chai, Fahe (author)
Atmospheric Environment ; 59 ; 186-191
2012-06-09
6 pages
Article (Journal)
Electronic Resource
English
Levels, sources and health risks of carbonyls and BTEX in the ambient air of Beijing, China
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