Elucidation of the Electrostatic Charging State of Ambient Aerosols

2016 Fiscal Year Final Research Report

• Project/Area Number: 26340010
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: Keio University
• Principal Investigator: Okuda Tomoaki 慶應義塾大学, 理工学部(矢上), 准教授 (30348809)
• Co-Investigator(Renkei-kenkyūsha): LENGGORO I. Wuled 東京農工大学, 大学院工学研究院, 准教授 (10304403)
• Research Collaborator: FUJIOKA Kentaro ; OKAHISA Shunichi ; KITAGAWA Midori ; TAKASHIMA Taku ; YOSHIDA Tetsuro ; GUNJI Yuma
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 環境分析 / 大気汚染防止・浄化 / 環境質定量化・予測 / エアロゾル / 帯電状態

Outline of Final Research Achievements

Exposure to atmospheric aerosols is considered a serious concern for human health. To understand the adverse effects of aerosol particle more accurately, we need to know its physico-chemical properties. In particular, it has been reported that the deposition of particles in the respiratory tract could be enhanced by the surface charge of particulate matter. In this study, we tried to elucide the electrostatic charging state of ambient aerosol particles. In FY2014, we measured the net electrostatic charging state of PM2.5 collected on filter media using two independent methods, a Faraday cage method and a surface potential measurement. In FY2015, we developed a measurement method of the electrostatic charging state of individual ambient aerosol particles using Kelvin probe force microscopy (KPFM). In FY2016, charging state of aerosols was measured using an electrical mobility method with parallel electrode plates.

Free Research Field

環境化学、大気化学、微粒子工学