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Elucidation of behavior and roles of photochemically active reactive oxygen species in seawater

Research Project

Project/Area Number 16K05622
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Geochemistry/Cosmochemistry
Research InstitutionHiroshima University

Principal Investigator

SAKUGAWA Hiroshi  広島大学, 生物圏科学研究科, 教授 (80263630)

Co-Investigator(Kenkyū-buntansha) 竹田 一彦  広島大学, 生物圏科学研究科, 准教授 (00236465)
Research Collaborator SUNDAY Michael  
ADESINA Adeniyi  
DERBALAH Aly  
ANIFOWOSE Adebanjo Jacob  
MARUMOTO Koji  
Project Period (FY) 2016-10-21 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords活性酸素 / スーパーオキシド / OHラジカル / 一重項酸素 / 過酸化水素 / 瀬戸内海 / 光化学反応 / 活性酸素種 / フリーラジカル / 溶存有機物の光分解 / 光化学反応過程 / 環境分析
Outline of Final Research Achievements

Seawater was collected in Seto Inland Sea, Japan to analyze reactive oxygen species such as hydroxyl radical(OH), superoxide ion (O2-), hydrogen peroxide (H2O2), singlect oxygen (1O2), nitric oxide (NO), organic hydroperoxides (ROOH), peroxide lipid (LOOH) and peroxynitrite (ONOO-). O2-, 1O2 and H2O2 were mainly produced by photochemical reactions of dissolved organic matter in seawater while photolysis of NO2- generated OH and NO. Reaction of O2- with NO was found to form ONOO-. Photochemical formation rate and steady state concentrations of these reactive oxygen species were 10-12 to 10-9 M/s and 10-18 to 10-9 M, respectively. This sudy first identified ONOO- in seawater.

Academic Significance and Societal Importance of the Research Achievements

海水中の活性酸素種の動態を包括的に明らかにした研究は国内外に存在しない。従来研究では、OH やH2O2などの単独の活性酸素種の測定が行われてきたので、活性酸素同士の消失反応も踏まえた動態の総合評価がなされていなかった。また、特定のDOM、金属等との同時測定がなされていないので、活性酸素種とこれらの物質の反応速度が不明であった。本研究により、海洋においてはDOM の酸化分解を介しての炭素循環、窒素化合物の酸化還元を介しての窒素循環にそれぞれ大きな役割を果たしていることを明らかにした。また、活性酸素種同士の相互作用や、メチル水銀や農薬などの有害物質の分解過程への関与を明らかにしたことに意義がある。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (20 results)

All 2019 2018 2017 2016 Other

All Int'l Joint Research (4 results) Journal Article (7 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 7 results,  Acknowledgement Compliant: 1 results) Presentation (9 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Int'l Joint Research] カフエルシーク大学(エジプト)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] オーサン州立大学(ナイジェリア)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] アクレ連邦工科大学(ナイジェリア)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] アクレ連邦工科大学化学科(ナイジェリア)

    • Related Report
      2016 Research-status Report
  • [Journal Article] Kinetics of photocatalytic removal of imidacloprid from water by advanced oxidation processes with respect to nanotechnology2019

    • Author(s)
      A. Derbalah, M. Sunday, R. Chidya, W. Jadoon, H. Sakugawa
    • Journal Title

      Journal of Water and Health

      Volume: 17 Issue: 2 Pages: 254-264

    • DOI

      10.2166/wh.2019.259

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] テレフタル酸とフェントン反応を利用した河川水中過酸化水素の定量における分析条件の最適化2019

    • Author(s)
      植木隆太, 加藤稜太, 今泉圭隆, 岩本洋子, W. A. Jadoon, 佐久川弘, 竹田一彦
    • Journal Title

      分析化学

      Volume: 218 Pages: 517-526

    • NAID

      130007607786

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Photogeneration and interactive reactions of three reactive species in the Seto Inland Sea, Japan2018

    • Author(s)
      A. O. Adesina, A. J. Anifowose, K. Takeda, H. Sakugawa
    • Journal Title

      Environmental Chemistry

      Volume: 15 Issue: 4 Pages: 236-245

    • DOI

      10.1071/en18035

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Nanomolar determination of hydrogen peroxide in coastal seawater based on the Fenton reaction with terephthalate2018

    • Author(s)
      K. Takeda, H. Nojima, K. Kuwahara, R. C. Chidya, A. O. Adesina, H. Sakugawa
    • Journal Title

      Analytical Sciences

      Volume: 34 Pages: 459-464

    • NAID

      130006682596

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photo-generation and Interactive Reactions of Three Reactive Species in Seto Inland Sea, Japan2018

    • Author(s)
      Adeniyi Olufemi Adesina, Adebanjo Jacob Anifowose, Kazuhiko Takeda, and Hiroshi Sakugawa
    • Journal Title

      Enviromental Chemistry

      Volume: in press

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A fluorometric method for selective determination of lipid hydroperoxides in river water2017

    • Author(s)
      Michael Oluwatoyin Sunday and Hiroshi Sakugawa
    • Journal Title

      Geochemical Journal

      Volume: 51 Pages: 571-581

    • NAID

      130006243140

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Simultaneous photoinduced generation of Fe2+ and H2O2 in rivers: An indicator for photo-Fenton reaction2016

    • Author(s)
      Khan M.G. Mostofa, Hiroshi Sakugawa
    • Journal Title

      Journal of Environmental Sciences

      Volume: 47 Pages: 34-38

    • DOI

      10.1016/j.jes.2015.12.020

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] Novel fluorescence method for determination of photochemically generated peroxynitrite in seawater2018

    • Author(s)
      Adeniyi Olufemi Adesina, Kazuhiko Takeda and Hiroshi Sakugawa
    • Organizer
      日本地球化学会2018年度年会(琉球大学)
    • Related Report
      2018 Annual Research Report
  • [Presentation] Spatial Distribution of Singlet Oxygen and Hydroxyl Radical in Seto Inland Sea and Their Significance Towards Pollutant Degradation2018

    • Author(s)
      Michael Oluwatoyin Sunday, Kazuhiko Takeda and Hiroshi Sakugawa
    • Organizer
      日本地球化学会2018年度年会(琉球大学)
    • Related Report
      2018 Annual Research Report
  • [Presentation] Spatio-temporal distribution of hydrogen peroxide in river water in Japan with respect to environmental factors2018

    • Author(s)
      Waqar Azeem Jadoon, Kazuhiko Takeda and Hiroshi Sakugawa1
    • Organizer
      日本地球化学会2018年度年会(琉球大学)
    • Related Report
      2018 Annual Research Report
  • [Presentation] 日本の河川水中の活性酸素種の測定、動態、役割2018

    • Author(s)
      佐久川弘、Waqar A. Jadoon、Michael O. Sunday、Adeniyi O. Adesina、Taiwo T. Ayeni、森田直毅、竹田一彦、岩本洋子
    • Organizer
      日本地球化学会2018年度年会(琉球大学)
    • Related Report
      2018 Annual Research Report
  • [Presentation] Development of a Fluorescence Method for Photochemically Generated Peroxynitrite in Seawater2017

    • Author(s)
      Adeniyi Olufemi Adesina, Kazuhiko Takeda, Hiroshi Sakugawa
    • Organizer
      2017年日本海洋学会秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Spatial DISTRIBUTION of Singlet Oxygen Generation in Surface Waters of Seto Inland Sea2017

    • Author(s)
      Michael Oluwatoyin Sunday, Kazuhiko Takeda and Hiroshi Sakugawa
    • Organizer
      2017年日本海洋学会秋季大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 瀬戸内海海水中の活性酸素種の測定、動態、役割の解明2017

    • Author(s)
      佐久川弘、ADENIYI OLUFEMI ADESINA、MICHAEL OLUWATOYIN  SUNDAY、竹田一彦
    • Organizer
      2017年日本海洋学会秋季大会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Selective determination of lipid hydroperoxides in natural water using a fluorescent probe2016

    • Author(s)
      Sunday Michael, Takeda Kazuhiko, Sakugawa Hiroshi
    • Organizer
      Americal Geophysical Union
    • Place of Presentation
      San Francisco, USA
    • Year and Date
      2016-12-12
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Distribution of hydrogen peroxide, fluorescent dissolved organic matter, and photochemically generated free radicals in Seto Inland Sea, Japan2016

    • Author(s)
      Adesina Adeniyi Olufemi, Anifowose Adebanjo Jacob, Takeda Kazuhiko and Sakugawa Hiroshi
    • Organizer
      日本化学会中国四国支部大会
    • Place of Presentation
      香川大学
    • Year and Date
      2016-11-05
    • Related Report
      2016 Research-status Report

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Published: 2016-10-24   Modified: 2020-03-30  

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