Asian Journal of Atmospheric Environment

Korean Society for Atmospheric Environment (한국대기환경학회)
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Preliminary Study on the Measurement of the Electrostatic Charging State of PM2.5 Collected on Filter Media

  • Okuda, Tomoaki (Faculty of Science and Technology, Keio University) ;
  • Yoshida, Tetsuro (Faculty of Science and Technology, Keio University) ;
  • Gunji, Yuma (Faculty of Science and Technology, Keio University) ;
  • Okahisa, Shunichi (Faculty of Science and Technology, Keio University) ;
  • Kusdianto, K. (BASE, Tokyo University of Agriculture and Technology) ;
  • Gen, Masao (BASE, Tokyo University of Agriculture and Technology) ;
  • Sato, Seiichi (BASE, Tokyo University of Agriculture and Technology) ;
  • Lenggoro, I. Wuled (BASE, Tokyo University of Agriculture and Technology)
  • Received : 2014.11.29
  • Accepted : 2015.03.18
  • Published : 2015.06.30
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Abstract

This study focused on the measurement of the actual charging state of ambient aerosol particles, which is important for understanding the intricate process of adverse health effects caused by particulate matter (PM). The net electrostatic charging state of $PM_{2.5}$ collected on filter media was measured in this study. The Faraday cage method and surface potential measurements were used in this study. The results showed that the polarities of the net charging state measured using these two methods were in agreement for 42 out of 48 samples (87.5%), and 36 samples (75%) were negatively charged. The filters were not significantly charged by friction between the filters and air not containing PM. Charge addition to or leakage from the filters was not observed over a two-month storage period. Net charging state of $PM_{2.5}$ collected on the filters was concluded to be negative in most cases, based on data's support of the assumption that aerosol charging state is not altered by the process of PM collection using filter.

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References

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