エアロゾル研究
Online ISSN : 1881-543X
Print ISSN : 0912-2834
ISSN-L : 0912-2834
研究論文
芳香族炭化水素の大気酸化による二次有機エアロゾル生成
佐藤 圭Björn KLOTZ畠山 史郎今村 隆史
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2008 年 23 巻 2 号 p. 86-93

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The photooxidation of aromatic hydrocarbons (AHCs) is one of the potential sources of secondary organic aerosol (SOA) in urban air, but the explicit reaction mechanisms of these SOA formations have not been elucidated. In this study, we measured SOA yields during oxidation of four AHCs from a series of laboratory experiments. The SOA yields from toluene, p-ethyltoluene, p-xylene and 1,3,5-trimethylbenzene were 0.07-0.11, 0.06-0.10, 0.02-0.04 and 0.02-0.03, respectively; the SOA yield from each AHC depended on the initial AHC concentration. On the basis of a previous reaction mechanism, in which condensable products are assumed to be formed by secondary reactions of primary oxidation products with ozone, the SOA concentrations were calculated and compared with the experimental results. As for each AHC, SOA yields measured at different initial AHC concentrations could be explained by assuming that the overall yield of primary oxidation products which forms SOA is constant being independent of the initial AHC concetration.

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© 2008 日本エアロゾル学会
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