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Reaction pathway analysis of organic micropollutants in advanced oxidation process by quantum chemical calculation

Research Project

Project/Area Number 19K21986
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 22:Civil engineering and related fields
Research InstitutionTokyo Institute of Technology

Principal Investigator

Fujii Manabu  東京工業大学, 環境・社会理工学院, 准教授 (30598503)

Project Period (FY) 2019-06-28 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2019: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords量子化学計算 / 促進酸化処理 / 有機微量汚染物質 / フェノール / ヒドロキシラジカル / 反応経路 / 変換生成物 / 水処理 / 高度処理 / 微量汚染物質
Outline of Research at the Start

現代社会において日々新たな有機化合物が開発されていく中で、水処理場に流入する有害物(農薬、医薬品など)は今後も増加の一途を辿ることが予想され、それらを一つ一つ実験的に調べるには膨大な人手と時間を有する。そこで、本研究では高度水処理において有機微量汚染物質がどのような反応経路で分解され、生産される中間生成物について包括的に評価可能な量子化学的計算法を開発する。

Outline of Final Research Achievements

In the treatment of various organic micropollutants such as pharmaceuticals and pesticides by using advanced oxidation process, it is important to fully understand their decomposition pathways and perform appropriate treatment to control the formation of harmful transformation product as well as treatment efficiency. This study investigated the reaction pathways of micropollutants using quantum chemical calculations to verify the applicability of theoretical calculations to the oxidative decomposition of micropollutants. More specifically, phenol was selected as a representative pollutant, and theoretical estimation of reaction sites and reaction rates were performed for oxidative degradation by OH radicals. Among the three level of theory examined in this study, M06-2X was found to be the most accurate in determining the degradation reaction site and rate constant.

Academic Significance and Societal Importance of the Research Achievements

水環境中には様々な汚染物質が存在する。その中でも医薬品や農薬類など人間活動由来の有機微量汚染物質の多くは難分解性を示し、現行の水処理では十分に分解除去できない場合がある。特に、十分に分解されず生じる変換物質には有毒なものも含まれるため、分解経路を十分に把握する必要がある。本研究では、従来の実験型アプローチとは異なり、効率的に実施可能と考えられる理論型アプローチを採用し、量子化学計算が酸化分解経路の推定において有用であるかを検討した。その結果、特にM06-2Xを用いることで、フェノールのOHラジカルによる酸化反応を精度よく計算できることが明らかとなった。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (4 results)

All 2020 2019 Other

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (2 results) (of which Int'l Joint Research: 1 results) Remarks (1 results)

  • [Journal Article] Prediction of reactive sites in the hydroxyl radical-mediated oxidation pathway of phenol by using quantum chemical calculation2019

    • Author(s)
      FUJII Manabu
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)

      Volume: 75 Issue: 7 Pages: III_225-III_235

    • DOI

      10.2208/jscejer.75.7_III_225

    • NAID

      130007814670

    • ISSN
      2185-6648
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Phenol Oxidation Pathways in Advanced Oxidation Process: A Theoretical Study2020

    • Author(s)
      Dhimas Dwinandha, Manabu Fujii
    • Organizer
      The Water and Environment Technology Conference Online 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 量子化学計算を用いたフェノール酸化分解過程での反応点の推定2019

    • Author(s)
      藤井学
    • Organizer
      第56回環境工学研究フォーラム
    • Related Report
      2019 Research-status Report
  • [Remarks] 東京工業大学 藤井 学

    • URL

      https://sites.google.com/site/manabufujiiattit/home

    • Related Report
      2019 Research-status Report

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Published: 2019-07-04   Modified: 2022-01-27  

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