• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Chemical dynamics of atmospheric peroxyl radicals

Research Project

Project/Area Number 21H04926
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 63:Environmental analyses and evaluation and related fields
Research InstitutionKyoto University

Principal Investigator

Kajii Yoshizumi  京都大学, 地球環境学堂, 教授 (40211156)

Co-Investigator(Kenkyū-buntansha) 佐藤 圭  国立研究開発法人国立環境研究所, 地域環境保全領域, 室長 (10282815)
河野 七瀬  近畿大学, 理工学部, 講師 (40736766)
坂本 陽介  国立研究開発法人国立環境研究所, 地域環境保全領域, 主任研究員 (50747342)
定永 靖宗  大阪公立大学, 大学院工学研究科, 准教授 (70391109)
Project Period (FY) 2021-04-05 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥42,120,000 (Direct Cost: ¥32,400,000、Indirect Cost: ¥9,720,000)
Fiscal Year 2023: ¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000)
Fiscal Year 2022: ¥13,390,000 (Direct Cost: ¥10,300,000、Indirect Cost: ¥3,090,000)
Fiscal Year 2021: ¥15,340,000 (Direct Cost: ¥11,800,000、Indirect Cost: ¥3,540,000)
Keywords光化学オキシダント / HOxラジカル / 過酸化ラジカル / オゾン / NOx / VOC / PM2.5 / 取込み / オキシダント / エアロゾル / 取り込み / RO2ラジカル / 問い込み反応速度 / HOxサイクル / オゾン生成速度 / 不均一反応 / 有機硝酸 / 取り込み係数 / チャンバー
Outline of Research at the Start

光化学オゾン生成機構の完全理解を目指し、重要な中間体である過酸化ラジカルの動態に関 する研究を進める。独自開発した過酸化ラジカル反応性測定装置を駆使し、過酸化ラジカル のNOxとの反応速度解析やエアロゾルへの取込み係数を測定できるシステムを確立し実大気 において計測する。スモッグチャンバーによる光化学実験を通し、過酸化ラジカルから生成 する有機硝酸類や過酸化物の評価を行いエアロゾルへの取り込み過程の検討をする。代表的 なオキシダントの種々のエアロゾルへの取込み係数を実測する。化学モデルの向上を図り過酸化ラジカルの後続反応が与える光化学オゾン生 成量への影響を推定する。

Outline of Final Research Achievements

To fully understand the mechanism of photochemical ozone formation, we have studied the dynamics of radical peroxides, which are important intermediates. We established a system to analyze the reaction rate of radical peroxides with NOx and to measure their uptake coefficients into aerosols, and measured them in actual atmospheric conditions. Through photochemical experiments using a smog chamber, we evaluated organic nitrates and peroxides generated from peroxide radicals and investigated their incorporation process into aerosols. Atmospheric observations were conducted to improve the chemical model and estimate the impact of subsequent reactions of radical peroxide on the amount of photochemical ozone production. Calculations based on observations of ozone production sensitivity reveal that results differ when the process by which peroxide radicals are taken-up into the aerosol is taken into account.

Academic Significance and Societal Importance of the Research Achievements

光化学オキシダントやPM2.5の増加は我国の憂慮すべき最重要環境問題の1つである。オキシダントの主要成分であるオゾンは前駆物質の削減が進んでいるにもかかわらず大気濃度が減少しないことから、環境対策の指針を策定するための科学的な根拠が強く求められている。オゾン濃度を再現するための数値モデルでは実測値に対し過小評価する傾向があり、我々の知識が不十分であることが指摘されている。過酸化ラジカルのエアロゾルへの取込みの寄与が実証された。この取込み過程は、オゾン制御を行う場合の政策に貢献する知見が得られた。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Comments on the Screening Results   Annual Research Report
  • Research Products

    (36 results)

All 2024 2023 2022

All Journal Article (15 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 14 results,  Open Access: 7 results) Presentation (21 results) (of which Int'l Joint Research: 6 results,  Invited: 7 results)

  • [Journal Article] Frontiers of Atmospheric Chemistry: No. 1. Overview of Chemical Reactions Occurring in the Atmosphere2024

    • Author(s)
      佐藤 圭
    • Journal Title

      Journal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi

      Volume: 59 Issue: 2 Pages: A87-A96

    • DOI

      10.11298/taiki.59.A87

    • ISSN
      1341-4178, 2185-4335
    • Year and Date
      2024-03-10
    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Improved continuous measurement system for atmospheric total peroxy and total organic nitrate under the high NO<i>x</i> condition2024

    • Author(s)
      Ohara Nagomi、Shioji Takahiro、Matsumoto Jun、Inomata Satoshi、Sakamoto Yosuke、Kajii Yoshizumi、Shiigi Hiroshi、Sadanaga Yasuhiro
    • Journal Title

      Review of Scientific Instruments

      Volume: 95 Issue: 4

    • DOI

      10.1063/5.0172219

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 過酸化ラジカル反応性測定が示すオゾン生成メカニズムの不確実性2024

    • Author(s)
      坂本陽介、黎珈汝、河野七瀬、佐藤圭、森野悠、梶井克純
    • Journal Title

      大気環境学会誌

      Volume: 59

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Investigation of HO2 uptake mechanisms onto multiple-component ambient aerosols collected in summer and winter time in Yokohama, Japan2024

    • Author(s)
      Zhou Jun、Fukusaki Yukiko、Murano Kentaro、Gautam Tania、Bai Yu、Inomata Yoshimi、Komatsu Hiroaki、Takeda Mayuko、Yuan Bin、Shao Min、Sakamoto Yosuke、Kajii Yoshizumi
    • Journal Title

      Journal of Environmental Sciences

      Volume: 137 Pages: 18-29

    • DOI

      10.1016/j.jes.2023.02.030

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Determination of Uptake Coefficient of Isoprene-Derived Organic Peroxy Radical onto Ambient Particles Using Laser Spectroscopic Techniques2023

    • Author(s)
      坂本 陽介、Li Jiaru、河野 七瀬、中山 智喜、佐藤 圭、梶井 克純
    • Journal Title

      Journal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi

      Volume: 58 Issue: 1 Pages: 1-9

    • DOI

      10.11298/taiki.58.1

    • ISSN
      1341-4178, 2185-4335
    • Year and Date
      2023-01-10
    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Study of Verification of Suppression Effect on Tropospheric Ozone Formation by Aerosol Particles and Source Identification of Unidentified and Difficult to Measure OH-reactive Substances2023

    • Author(s)
      坂本 陽介
    • Journal Title

      Journal of Japan Society for Atmospheric Environment / Taiki Kankyo Gakkaishi

      Volume: 58 Issue: 1 Pages: 35-45

    • DOI

      10.11298/taiki.58.35

    • ISSN
      1341-4178, 2185-4335
    • Year and Date
      2023-01-06
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Investigation of HO<sub>2</sub>uptake onto Cu(<scp>ii</scp>)- and Fe(<scp>ii</scp>)-doped aqueous inorganic aerosols and seawater aerosols using laser spectroscopic techniques2023

    • Author(s)
      Li Jiaru、Sakamoto Yosuke、Sato Kei、Morino Yu、Kajii Yoshizumi
    • Journal Title

      Environmental Science: Atmospheres

      Volume: 3 Issue: 10 Pages: 1384-1395

    • DOI

      10.1039/d3ea00093a

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Impact of Hydrogen Mixture on Fuel Consumption and Exhaust Gas Emissions in a Truck with Direct-Injection Diesel Engine2023

    • Author(s)
      Wang Muxi、Matsugi Akira、Kondo Yoshinori、Sakamoto Yosuke、Kajii Yoshizumi
    • Journal Title

      Energies

      Volume: 16 Issue: 11 Pages: 4466-4466

    • DOI

      10.3390/en16114466

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Mechanism of Fenton Oxidation of Levoglucosan in Water2023

    • Author(s)
      Enami Shinichi、Morino Yu、Sato Kei
    • Journal Title

      The Journal of Physical Chemistry A

      Volume: 127 Issue: 13 Pages: 2975-2985

    • DOI

      10.1021/acs.jpca.3c00512

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Determination of Uptake Coefficient of Peroxy Radical Loss by Aerosols Using HO<sub>x</sub> Reactivity Measurement Technique2022

    • Author(s)
      坂本 陽介
    • Journal Title

      Earozoru Kenkyu

      Volume: 37 Issue: 1 Pages: 5-11

    • DOI

      10.11203/jar.37.5

    • ISSN
      0912-2834, 1881-543X
    • Year and Date
      2022-03-20
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Decomposition of multifunctionalized α-alkoxyalkyl-hydroperoxides derived from the reactions of Criegee intermediates with diols in liquid phases2022

    • Author(s)
      Endo Yasuyuki、Sakamoto Yosuke、Kajii Yoshizumi、Enami Shinichi
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 24 Issue: 19 Pages: 11562-11572

    • DOI

      10.1039/d2cp00915c

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Chemical Characterization and Health Risk Assessment of Particulate Matter from Household Activities in Bamako, Mali, Western Sub-Saharan Africa2022

    • Author(s)
      Sidibe Alimata、Sakamoto Yosuke、Murano Kentaro、Sato Keiichi、Yuba Akie、Futami Mari、Koita Ousmane A.、Traore Ibrahim、Kajii Yoshizumi
    • Journal Title

      Atmosphere

      Volume: 13 Issue: 8 Pages: 1290-1290

    • DOI

      10.3390/atmos13081290

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Impacts of missing OH reactivity and aerosol uptake of HO2 radicals on tropospheric O3 production during the AQUAS-Kyoto summer campaign in 20182022

    • Author(s)
      N. Kohno, J. Zhou, J. Li, M. Takemura, N. Ono, Y. Sadanaga, Y. Nakashima, K. Sato, S. Kato, Y. Sakamoto, Y. Kajii
    • Journal Title

      Atmospheric Environment

      Volume: 281 Pages: 119130-119130

    • DOI

      10.1016/j.atmosenv.2022.119130

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Potential Factors Contributing to Ozone Production in AQUAS?Kyoto Campaign in Summer 2020: Natural Source-Related Missing OH Reactivity and Heterogeneous HO<sub>2</sub>/RO<sub>2</sub> Loss2022

    • Author(s)
      Li Jiaru、Kohno Nanase、Sakamoto Yosuke、Pham Huy Gia、Murano Kentaro、Sato Kei、Nakayama Tomoki、Kajii Yoshizumi
    • Journal Title

      Environmental Science &amp; Technology

      Volume: 56 Issue: 18 Pages: 12926-12936

    • DOI

      10.1021/acs.est.2c03628

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Investigation of OH-reactivity budget in the isoprene, α-pinene and m-xylene oxidation with OH under high NOx conditions2022

    • Author(s)
      Sakamoto Yosuke、Kohno Nanase、Ramasamy Sathiyamurthi、Sato Kei、Morino Yu、Kajii Yoshizumi
    • Journal Title

      Atmospheric Environment

      Volume: 271 Pages: 118916-118916

    • DOI

      10.1016/j.atmosenv.2021.118916

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Presentation] Strategy to control photochemical ozone formation, what could we do?2024

    • Author(s)
      Yoshizumi Kajii
    • Organizer
      ENVIRONMENTAL SUSTAINABILITY THROUGH WASTE AND RECYCLING 2024
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Modeling studies of the effect of HO2 uptake by atmospheric aerosol on surface ozone.2023

    • Author(s)
      Morino, Y., Sato, K., Sakamoto, Y., Li, J., Chatani, S., Shimadera, H., Kajii, Y.
    • Organizer
      The 22nd Annual CMAS Conference, Chapel Hill, NC, USA
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Experimental determination of uptake coefficient of isoprene-derived peroxy radical onto deliquesced NaCl particles.2023

    • Author(s)
      Sakamoto, Y., Mikami, R., Kohno, N., Sato, K., Kajii, Y.
    • Organizer
      Goldschmidt 2023 Conference, Lyon, France
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] HO2 uptake onto deliquesced inorganic aerosols and doping impacts of transition metal ions.2023

    • Author(s)
      Li, J., Sakamoto, Y., Sato, K., Kajii, Y.
    • Organizer
      Goldschmidt 2023 Conference, Lyon, France
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effects of copper-doped aerosol upon the ozone formation during VOC/NOx photooxidation.2023

    • Author(s)
      Sato, K., Fardilah, R.D., Li, J., Morino, Y., Sakamoto, Y., Kajii, Y.
    • Organizer
      Japan Geoscience Union Meeting 2023, Chiba, Japan
    • Related Report
      2023 Annual Research Report
  • [Presentation] Uptake coefficient of HO2 onto deliquesced inorganic aerosols with and without transition metal ions.2023

    • Author(s)
      Li, J., Sakamoto, Y., Sato, K., Murano, K., Kajii, Y.
    • Organizer
      Japan Geoscience Union Meeting 2023, Chiba, Japan
    • Related Report
      2023 Annual Research Report
  • [Presentation] The effect of dissolved ions on uptake coefficient of propene-derived RO2 onto NaCl particles.2023

    • Author(s)
      Mikami, R., Sakamoto, Y., Sato, K., Li, J., Kajii, Y.
    • Organizer
      Japan Geoscience Union Meeting 2023, Chiba, Japan
    • Related Report
      2023 Annual Research Report
  • [Presentation] チャンバー実験によるOx生成機構の解明について. 令和4年度 関東地方大気環境対策推進連絡会2023

    • Author(s)
      佐藤圭
    • Organizer
      微小粒子状物質・光化学オキシダント調査会議 講演会, オンライン
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] チャンバーを用いたBVOC等から生成する二次粒子の生成過程に関する研究2022

    • Author(s)
      佐藤圭
    • Organizer
      大気環境学会近畿支部講演会, オンライン/大阪
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 数値モデルによるオゾン生成速度・生成レジームの再現性検証. 第63回大気環境学会年会 特別集会, 大阪2022

    • Author(s)
      森野悠、佐藤圭、定永靖宗、坂本陽介、梶井克純
    • Organizer
      第63回大気環境学会年会 特別集会, 大阪
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 都市域における有機硝酸の観測および有機硝酸生成がオゾン生成に与える影響2022

    • Author(s)
      定永靖宗、河野七瀬、黎珈汝、坂本陽介、中嶋吉弘、加藤俊吾、佐藤圭、中山智喜、梶井克純
    • Organizer
      第63回大気環境学会年会 特別集会, 大阪
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 大気エアロゾルサンプルにおけるイオンモビリティースペクトロメトリーの応用と可能性2022

    • Author(s)
      飯沼賢輝、猪俣敏、佐藤圭
    • Organizer
      第63回大気環境学会年会 特別集会, 大阪
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] エアロゾルへの有機過酸化ラジカル取込による対流圏オゾン生成抑制効果のHOx反応性測定に基づく定量的評価2022

    • Author(s)
      坂本陽介、Li, J.、河野七瀬、中山智喜、佐藤圭、梶井克純
    • Organizer
      第63回大気環境学会年会 特別集会, 大阪
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 模擬大気を用いたスモッグチャンバー実験でのNOxおよびVOCに対するオゾン生成感度2022

    • Author(s)
      佐藤圭、宮武宏輔、森野悠、坂本陽介、今村隆史、梶井克純
    • Organizer
      第63回大気環境学会年会, 大阪
    • Related Report
      2022 Annual Research Report
  • [Presentation] 2020 年夏季京都市内におけるオゾン生成レジームの実測による評価2022

    • Author(s)
      村岡達也、定永靖宗、野尻亮太、大原和、河野七瀬、黎珈汝、坂本陽介、中嶋吉弘、佐藤圭、加藤俊吾、中山智喜、松岡雅也、椎木弘、梶井克純
    • Organizer
      第63回大気環境学会年会, 大阪
    • Related Report
      2022 Annual Research Report
  • [Presentation] オゾン生成に対する自然エミッションとエアロゾルによるHO2/RO2取り込みの影響----2020年京都における夏季観測を例として2022

    • Author(s)
      Li, J., Kohno, N., Sakamoto, Y., Murano, K., Sato, K., Nakayama, T., Kajii, Y.
    • Organizer
      第63回大気環境学会年会, 大阪
    • Related Report
      2022 Annual Research Report
  • [Presentation] OH/HO2 uptake coefficient onto various polydisperse aerosols detected by combining laser-pump and laser-induced fluorescence.2022

    • Author(s)
      Li, J., Sakamoto, Y., Sato, K., Kajii, Y.
    • Organizer
      iCACGP-IGAC Joint Conference 2022, Manchester, UK
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Uptake coefficients of OH and HO2 radicals onto polydisperse aerosols determined by combining laser-pump and laser-induced fluorescence.2022

    • Author(s)
      Li, J., Sakamoto, Y., Sato, K., Murano, K., Kajii, Y.
    • Organizer
      第27回大気化学討論会, 茨城
    • Related Report
      2022 Annual Research Report
  • [Presentation] チャンバーを用いたO3生成感度計測とレジーム判定装置の検証2022

    • Author(s)
      佐藤圭, 森野悠, 定永靖宗, 宮武宏輔, 坂本陽介, 今村隆史, 梶井克純
    • Organizer
      第27回大気化学討論会, 茨城
    • Related Report
      2022 Annual Research Report
  • [Presentation] 湿潤条件における無機エアロゾルへのイソプレン由来過酸化ラジカルの取り込み係数決定因子の考察2022

    • Author(s)
      坂本陽介, Li, J., 河野七瀬, 佐藤圭, 梶井克純
    • Organizer
      第27回大気化学討論会, 茨城
    • Related Report
      2022 Annual Research Report
  • [Presentation] Observe unknown OH-reactants and HO2/RO2 uptake by ambient aerosols in a field study as ozone production potential factors.2022

    • Author(s)
      Li, J., Kohno, N., Sakamoto, Y., Pham, H.G., Murano, K., Sato, K., Nakayama, T., Kajii, Y.
    • Organizer
      nstitute of Nature and Environmental Technology International Symposium
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi