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Elucidation of the Electrostatic Charging State of Ambient Aerosols and Evaluation of Its Effect on Deposition to Body Tissue

Research Project

Project/Area Number 17H01864
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental dynamic analysis
Research InstitutionKeio University

Principal Investigator

Okuda Tomoaki  慶應義塾大学, 理工学部(矢上), 准教授 (30348809)

Co-Investigator(Kenkyū-buntansha) 岩田 歩  慶應義塾大学, 理工学部(矢上), 助教 (30827340)
深潟 康二  慶應義塾大学, 理工学部(矢上), 教授 (80361517)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Fiscal Year 2019: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2018: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2017: ¥9,620,000 (Direct Cost: ¥7,400,000、Indirect Cost: ¥2,220,000)
Keywordsエアロゾル / 帯電状態 / 沈着 / 生体影響 / 電気移動度 / KPFM / PM2.5 / 粒子状物質 / 粒子帯電 / 環境分析 / 環境質定量化・予測 / 大気汚染防止・浄化 / 気象条件
Outline of Final Research Achievements

Several laboratory experiments and numerical simulations have shown that the aerosol charging state influences particle deposition on human airway surfaces. However, the actual charging state of ambient aerosol particles is still quite unknown. We try to elucidate the mechanisms of aerosol charging and its impact on the surrounding environment including human body by measuring several parameters of atmospheric aerosols through the development of original measurement methods (K-MACS: Keio-Measurement System of Aerosol Charging State). The particle charge distribution varied depending on the measurement date. The fraction of non-charged particles (10-25%) negatively correlated with volumetric humidity. A laboratory experiment supported this correlation between the aerosol charging state and volumetric humidity.

Academic Significance and Societal Importance of the Research Achievements

大気エアロゾル粒子は、呼吸によって生体内に入り込み健康に悪影響を及ぼすことが知られている。エアロゾル粒子の有害性を議論する上で把握すべき特性のうち、粒子の帯電状態については、それが粒子の生体沈着に関わるため重要性が指摘されているにも関わらず、ほとんど研究が進んでいなかった。そこで本研究では、実環境大気エアロゾル粒子の帯電状態を解明することを目的として、その計測手法の開発、年間を通じたフィールド調査、および室内実験を行った。今後は本研究で得られた粒子の帯電挙動の知見を用いて、エアロゾル粒子の帯電状態による生体への沈着挙動に対して、観測事実に基づいた確実性を加えることが可能となると期待される。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (24 results)

All 2020 2019 2018 2017 Other

All Int'l Joint Research (2 results) Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 2 results) Presentation (12 results) (of which Int'l Joint Research: 8 results,  Invited: 1 results) Remarks (5 results)

  • [Int'l Joint Research] 西安交通大学(中国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] 西安交通大学(中国)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Charging states on atmospheric aerosol particles affected by meteorological conditions2020

    • Author(s)
      He Yuanping、Gu Zhaolin、Lu Weizhen、Zhang Liyuan、Zhang Daizhou、Okuda Tomoaki、Yu Chuck Wah
    • Journal Title

      Particuology

      Volume: 52 Pages: 1-9

    • DOI

      10.1016/j.partic.2019.12.007

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Atmospheric humidity and particle charging state on agglomeration of aerosol particles2019

    • Author(s)
      He, Y., Gu, Z., Lu, W., Zhang, L., Okuda, T., Fujioka, K., Luo, H., Yu, C.
    • Journal Title

      Atmospheric Environment

      Volume: 197 Pages: 141-149

    • DOI

      10.1016/j.atmosenv.2018.10.035

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Numerical simulation of parallel-plate particle separator for estimation of charge distribution of PM2.52019

    • Author(s)
      Yonemichi, T., Fukagata, K., Fujioka, K., Okuda, T.
    • Journal Title

      Aerosol Science and Technology

      Volume: 53 Issue: 4 Pages: 394-405

    • DOI

      10.1080/02786826.2019.1569198

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Seasonal variation in atmospheric particle electrostatic charging states determined using a parallel electrode plate device2019

    • Author(s)
      Iwata, A., Fujioka, K., Yonemichi, T., Fukagata, K., Kurosawa, K., Tabata, R., Kitagawa, M., Takashima, T., Okuda, T.
    • Journal Title

      Atmospheric Environment

      Volume: 203 Pages: 62-69

    • DOI

      10.1016/j.atmosenv.2019.01.040

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 地下鉄構内空気中粒子状物質の特性調査2019

    • Author(s)
      奥田知明,坂出壮伸,藤岡謙太郎,田端凌也,黒澤景一,野村優貴,岩田歩,藤原基
    • Journal Title

      大気環境学会誌

      Volume: 54 Pages: 28-33

    • NAID

      130007618321

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Elucidation of the relationship between the electrostatic charging state of ambient aerosols and meteorological condition by a parallel electrode plate device2019

    • Author(s)
      Ryoya Tabata, Ayumi Iwata, Kentaro Fujioka, Takuto Yonemichi, Koji Fukagata, and Tomoaki Okuda
    • Organizer
      11th Asian Aerosol Conference (Hong Kong, China)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Elucidation of the Influence of Specific Meteorological Conditions on the Electrostatic Charging State of Ambient Aerosols by a Parallel Electrode Plate Device2019

    • Author(s)
      Ryoya Tabata, Ayumi Iwata, Kentaro Fujioka, Tomoaki Okuda
    • Organizer
      American Association for Aerosol Research 37th Annual Conference (Portland, Oregon, USA)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 平行電極板デバイスを用いた実環境大気エアロゾルの帯電状態の支配要因の解明2019

    • Author(s)
      田端凌也、岩田歩、藤岡謙太郎、奥田知明
    • Organizer
      第36回エアロゾル科学・技術討論会、広島大学(広島県・東広島市)
    • Related Report
      2019 Annual Research Report
  • [Presentation] Elucidation of electrostatic charging characteristics of radioactive Cs-bearing particles by Kelvin Probe Force Microscopy2019

    • Author(s)
      Kurosawa, K., Iwata, A., Satou, Y., Igarashi, Y., Abe, Y., Okuda, T.
    • Organizer
      IU-IRSN/Japan-UK EICHI-project joint international workshop on radioactive particles, Mito, Japan
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measurement of the electrostatic charging state of aerosol using a parallel electrode plate device2018

    • Author(s)
      Fujioka, K., Iwata, A., Tabata, R., Kurosawa, K., Yonemichi, T., Fukagata, K., Okuda, T.
    • Organizer
      10th International Aerosol Conference, St. Louis, USA
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Numerical simulation of a parallel-plate separator for PM2.52018

    • Author(s)
      Yonemichi, T., Fukagata, K., Fujioka, K., Okuda, T.
    • Organizer
      10th International Aerosol Conference, St. Louis, USA
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measurement of the chemical components of aerosol particles with different electrostatic charging state2018

    • Author(s)
      Kurosawa, K., Fujioka, K., Yonemichi, T., Fukagata, K., Okuda, T.
    • Organizer
      Joint International Symposium of 14th CACGP & 15th IGAC, Takamatsu, Japan
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Measurement of the electrostatic charging state of ambient aerosol using a parallel electrode plate device2018

    • Author(s)
      Tabata, R., Iwata, A., Fujioka, K., Kurosawa, K., Yonemichi, T., Fukagata, K., Okuda, T.
    • Organizer
      Joint International Symposium of 14th CACGP & 15th IGAC, Takamatsu, Japan
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Numerical simulation of a parallel plate particle separator for measurement of charging state of PM2.52017

    • Author(s)
      Yonemichi, T., Fukagata, K., Fujioka, K., Okuda, T.
    • Organizer
      9th JSME-KSME Thermal and Fluids Engineering Conference
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 生体有害性に関連する微小粒子状物質の物理化学特性解明の試み2017

    • Author(s)
      奥田知明
    • Organizer
      第34回エアロゾル科学・技術研究討論会、芝浦工業大学
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 人為的に発生させたエアロゾルの帯電状態の測定2017

    • Author(s)
      藤岡謙太郎、黒澤景一、北川みどり、岡久峻一、高島拓、奥田知明
    • Organizer
      第34回エアロゾル科学・技術研究討論会、芝浦工業大学
    • Related Report
      2017 Annual Research Report
  • [Presentation] 平行電極板デバイスを用いた実環境大気エアロゾルの帯電状態の測定2017

    • Author(s)
      藤岡謙太郎、米道卓音、深潟康二、北川みどり、岡久峻一、高島拓、奥田知明
    • Organizer
      第58回大気環境学会年会、兵庫医療大学
    • Related Report
      2017 Annual Research Report
  • [Remarks] 環境化学研究室 | 研究内容 | ハイライト【粒子の帯電状態】

    • URL

      https://www.applc.keio.ac.jp/~okuda/research/theme/charge.html

    • Related Report
      2019 Annual Research Report
  • [Remarks] KEIO RESEARCH HIGHLIGHTS | Air pollution and ...

    • URL

      https://research-highlights.keio.ac.jp/2019/03/b.html

    • Related Report
      2019 Annual Research Report
  • [Remarks]

    • URL

      http://www.applc.keio.ac.jp/~okuda/research/index.html

    • Related Report
      2018 Annual Research Report
  • [Remarks]

    • URL

      https://research-highlights.keio.ac.jp/2019/03/b.html

    • Related Report
      2018 Annual Research Report
  • [Remarks]

    • URL

      http://www.applc.keio.ac.jp/~okuda/research/index.html

    • Related Report
      2017 Annual Research Report

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Published: 2017-04-28   Modified: 2021-02-19  

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