New development of indoor ultrafine particle-Emission, behavior and control of secondary organic aerosol

由挥发性有机物（VOCs）形成的二次有机气溶胶（SOA）是室内污染的重要因素。关于d-柠檬烯与O_3在紫外线照射下反应生成颗粒的报道很多。而对二氯苯的SOA研究很少，对二氯苯在日本被用于樟脑丸。本研究在无初始O_3源的情况下，对VOCs，特别是d-柠檬烯和对二氯苯的颗粒形成进行了筛选实验。并在真实房间进行了室内空气中普通使用家政产品挥发性有机化合物的暴露实验。监测了空气中颗粒物、NOx和O_3浓度。以d-柠檬烯为实验对象，在紫外线照射下，当气囊中产生O_3时，开始形成颗粒。而对二氯苯（不含NOx）实验，在开始UV照射后立即产生<50nm的颗粒。

Secondary organic aerosol(SOA) formation from volatile organic compounds(VOCs) is an important factor of the indoor pollutions. There are many reports about particle for mation by the reaction of d-Limonene and O_3 under UV irradiation. While there are few study about SOA from p-Dichlorobenzene, which is used for a mothball in Japan.In this study, the screening experiments were performed on particle formation from VOCs, especially d-Limonene and p-Dichlorobenzene, without initial O_3 source. And experiment at the real room was performed on exposure to VOCs emitted from housekeeping products under ordinary usage in the residential room air. Particle, NOx and O_3 concentrations in the air were monitored. At the case of experiment with d-Limonene under UV irradiation, particle formation was started when O_3 was generated in the gasbag. In contrast, for experiments with p-Dichlorobenzene(without NOx), particles(<50nm) generated immediately after starting UV irradiation.