期刊
JOURNAL OF ENVIRONMENTAL SCIENCES
卷 22, 期 9, 页码 1348-1356出版社
SCIENCE PRESS
DOI: 10.1016/S1001-0742(09)60261-8
关键词
Olympic Games; Paralympic Games; carbonyl compounds; traffic restriction; photochemical reactions; vehicular exhaust
资金
- National Natural Science Foundation of China [20977097, 40830101, 41075094]
- Chinese Academy of Sciences [KZCX2-YW-Q02-03]
- Platform Construction of Introducing Central Resources in Beijing [PXM2008_178305_06995]
- National Basic Research and Development Program (973) of China [2010CB732304]
The measurements of atmospheric carbonyls concentrations in Beijing were conducted from 12 July to 8 October, 2008, covering the periods of the 2008 Olympic Games and Paralympic Games. Six carbonyls, including formaldehyde, acetaldehyde, acetone, butyraldehyde, valeraldehyde, and hexaldehyde, were identified in all air samples. The total average concentrations of these carbonyls before, during, and after traffic restriction were (48.1 +/- 15.2), (36.6 +/- 14.5) and (23.4 +/- 12.3) mu g/m(3), respectively. Compared with the period after traffic restriction, the distinct high concentrations of the carbonyls before and during traffic restriction were primarily ascribed to the remarkable contribution of photochemical reactions. With respect to our previous investigation in the summer of 2005, the reductions of formaldehyde, acetaldehyde and acetone during traffic restriction period were about 64%, 47% and 27%, respectively, indicating that the air cleaning actions adopted by the Chinese government for the two games were efficient. The lowest levels of atmospheric carbonyls and the extremely high composition proportion of acetone after the traffic restriction were mainly attributed to the long-term effect of the control measures for the two games.
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