Elucidating ion distribution at the air-water interface

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K12188
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Environmental dynamic analysis
• Research Institution: National Institute for Environmental Studies (2016-2017); Kyoto University (2015)
• Principal Investigator: Enami Shinichi 国立研究開発法人国立環境研究所, 環境計測研究センター, 主任研究員 (00589385)
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 界面 / イオン / 水滴 / エアロゾル / 大気 / 粒子 / 疎水性 / ホフマイスター

Outline of Final Research Achievements

Ions at the air/water interface play key roles in the atmosphere, for example, nucleation, growth, and aging process of atmospheric aerosol. Surface-active ions (such as iodide) are expected to react preferentially with atmospheric oxidants, such as the ozone and OH radical, at the air/water interface via specific mechanisms. However, establishing the relative "availability" of the different ions to gas-phase oxidants at the air/water interface under atmospherically relevant conditions is challenging. The interfacial availability of atmospherically relevant ions, including carboxylate ions Rn-COO- (n = 1-7) and n-, cyclo-, aromatic-R6-COO-, at the air/water interface is investigated by a novel application of mass spectrometry of aqueous microjets.

Free Research Field

大気環境科学