大気中における有機物の関与する不均一／多相反応：オゾン酸化およびアルデヒドの反応

概要

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Heterogeneous/multiphase reactions can play an important role in the formation, chemical transforma tion, and loss/removal of organic aerosol components in the atmosphere. In this paper, we review recent laboratory experiments on the ozonolysis of condensed-phase organics and heterogeneous/multiphase reactions involving aldehydes. This review includes studies on the hygroscopicity of condensed-phase organics formed by heterogeneous/multiphase reactions. Further, we present our experimental methods to investigate these two types of reactions, using extracts from atmospheric aerosol samples collected on filters. We emphasize the importance of performing laboratory experiments using ambient aerosol com ponents or organic mixtures with complex compositions (e.g., secondary organic aerosols generated in a chamber) to better understand the significance of these reactions under actual atmospheric conditions, and to find reaction pathways that have been overlooked in previous studies. Field studies may also be useful to assess laboratory-based knowledge and to find new reaction pathways.
日本エアロゾル学会の論文