Atmospheric levels of BTEX compounds during the 2008 Olympic Games in the urban area of Beijing

Journal Article

Print(0)

The Science of the total environment

Sci.Total Environ.

15-Dec

408

109

116

LR: 20131121; JID: 0330500; 0 (Air Pollutants); 0 (Benzene Derivatives); 0 (Vehicle Emissions); 0 (Xylenes); 3FPU23BG52 (Toluene); 7U1EE4V452 (Carbon Monoxide); 2009/02/20 [received]; 2009/09/11 [revised]; 2009/09/16 [accepted]; 2009/10/08 [aheadofprint];

Netherlands

1879-1026; 0048-9697

PMID: 19815254

eng

Journal Article; Research Support, Non-U.S. Gov't; IM

10.1016/j.scitotenv.2009.09.026 [doi]

Unknown(0)

19815254

The hourly concentrations of BTEX (Benzene, Toluene, Ethylbenzene, m,p-Xylene and o-Xylene) in the urban area of Beijing were measured during July-October 2008, covering the periods of the 2008 Olympic Games and Paralympic Games. The atmospheric BTEX were pre-concentrated on Tenax-TA tubes, and analyzed by GC-PID (Gas Chromatography with Photo Ionization Detector) after thermal desorption. During the games, the mean daytime concentrations of benzene, toluene, ethylbenzene, m,p-xylene and o-xylene were 2.37, 3.97, 1.92, 3.51 and 1.90 microg/m3, respectively, and were 52.8%, 63.9%, 56.4%, 56.8% and 46.9%, respectively lower than those after the games. The significantly positive correlation between BTEX and CO as well as the ratio of benzene/toluene suggested that the vehicle exhaust was the major source of BTEX during the whole investigated period. The extremely high ratios of ethylbenzene to m,p-xylene (E/X) were mainly observed at noontime in haze days, indicating that photochemical reactions were highly active under these typical days.

Air Pollutants/analysis/chemistry, Atmosphere/chemistry, Benzene Derivatives/analysis/chemistry, Carbon Monoxide/analysis, China, Cities, Environmental Monitoring, Internationality, Photochemistry, Sports, Time Factors, Toluene/analysis, Urban Population, Vehicle Emissions/analysis, Volatilization, Xylenes/analysis

Liu,J., Mu,Y., Zhang,Y., Zhang,Z., Wang,X., Liu,Y., Sun,Z.

Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.

20091008

http://vp9py7xf3h.search.serialssolutions.com/?charset=utf-8&pmid=19815254

2009