Understanding the mechanism of deposition of airborne particulates on solid surfaces: Modeling and analysis of particle behavior

2017 Fiscal Year Final Research Report

• Project/Area Number: 26420761
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Properties in chemical engineering process/Transfer operation/Unit operation
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: Lenggoro Wuled 東京農工大学, 工学(系)研究科(研究院), 准教授 (10304403)
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: エアロゾル / ナノ粒子 / 植物 / 葉 / サブミクロン / 大気環境 / 表面 / 静電気力

Outline of Final Research Achievements

It is well known that submicron particles (SMP) show high number concentration in the atmosphere. However, the mechanism of deposition of SMP from the atmosphere has not been clarified. We focused on "dynamic" side (generation, transport) and "static" side (surface). Metal and polymer were also used as model surface. The SMP concentration was measured in real time and the microscope-route after the collection was also observed.
Results: 1) Soot derived from combustion forms a hydrophobic or hydrophilic layer. 2) When there is no flow, SMP deposits with high efficiency. 3) Designed/developed a electro-static type collector without a suction pump; From Tokyo and Malaysia, we confirmed high concentration SMP. 4) Proposed a cleaning method for detaching SMP from the collection surface in water. 5) Water-soluble SMP was sprayed on Komatsuna (few weeks); The amount of SMP on the leaves decreased with time. There is a high possibility that the dissolved ions are absorbed into the leaves.

Free Research Field

化学工学