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Development of water treatment technology with selectivity using sulfate radicals

Research Project

Project/Area Number 19K04667
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 22060:Environmental systems for civil engineering-related
Research InstitutionTokyo Metropolitan University

Principal Investigator

Sakai Hiroshi  東京都立大学, 都市環境科学研究科, 准教授 (70533123)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords硫酸ラジカル / 紫外線水処理 / 土木環境システム
Outline of Research at the Start

オゾンや紫外線過酸化水素(UV/H2O2)処理で生成するOHラジカルは、高い酸化力で難分解性の有機物を酸化分解する処理であり、高度水処理手法として、用排水システムにおける健康リスクの低減に効果を上げてきた。だが、無差別/非選択的な反応に起因する、新たな課題が散見されている。そこで本研究では、OHラジカルと比較して反応に選択性がある硫酸ラジカルを利用し、水処理に用いた際の反応の選択性を明らかにし、新たな水質管理手法を構築することを目的とする。

Outline of Final Research Achievements

In this study, we attempted to determine the effect of sulfate radical treatment on persistent organic matter by UV irradiation in the form of either persulfate or hydrogen peroxide. Compared to hydrogen peroxide, persulfate showed a higher reduction rate and efficiency at the same UV dose. The results of experiments with humic acid, amino acids, and various dyes showed differences in UV254 absorbance and NPOC reduction trends, with the absorbance reduction rate being greater than that of NPOC at the initial stage.
As a mechanism, it is thought that the difference in bond dissociation energy of persulfate compared to hydrogen peroxide causes a higher concentration of radicals and a higher decomposition rate.

Academic Significance and Societal Importance of the Research Achievements

難分解性の有機物は、地表水や地下水でよく見られる有機化合物の複雑なマトリックスであり、飲料水処理に大きな影響を与える。その中でも疎水性NOMはNOMの主要な構成要素と考えられており、水中のDOCの半分を占めている。
本研究では、フミン酸を用い、過硫酸塩または過酸化水素を添加した形で紫外線照射を行うことで、難分解性有機物に対する硫酸ラジカル処理の効果を明らかにすることを試み、過酸化水素に代わる新たな処理として、硫酸ラジカル処理の効果を明らかにした。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (11 results)

All 2022 2021 2020 2019

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (8 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] Review on effect of different type of dyes on advanced oxidation processes (AOPs) for textile color removal2022

    • Author(s)
      Ismail Guntur Adisurya、Sakai Hiroshi
    • Journal Title

      Chemosphere

      Volume: 291 Pages: 132906-132906

    • DOI

      10.1016/j.chemosphere.2021.132906

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Use of an ultraviolet light-activated persulfate process to degrade humic substances: effects of wavelength and persulfate dose2021

    • Author(s)
      Fang Yiming、Sakai Hiroshi
    • Journal Title

      Environmental Science and Pollution Research

      Volume: 29 Issue: 7 Pages: 9923-9931

    • DOI

      10.1007/s11356-021-15392-2

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Degradation of Linear Alkylbenzene Sulfonate by UV/H2O2 Process2020

    • Author(s)
      Sakai Hiroshi、Song HangXiang、Goto Ryota
    • Journal Title

      Ozone: Science & Engineering

      Volume: 44 Issue: 4 Pages: 1-7

    • DOI

      10.1080/01919512.2020.1805938

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] UV/H2O2及びUV/Na2S2O8を用いたLASの分解効果2021

    • Author(s)
      後藤遼太、酒井宏治
    • Organizer
      第58回下水道研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 開発途上国を想定した生活排水に含まれるLASの UV/H2O2を用いた促進酸化処理の分解効果の検討2021

    • Author(s)
      石田啓介、酒井宏治
    • Organizer
      第58回環境工学研究フォーラム
    • Related Report
      2021 Annual Research Report
  • [Presentation] 硫酸ラジカルを用いた有機物の促進酸化に関する研究2021

    • Author(s)
      小野和樹、酒井宏治
    • Organizer
      第55回日本水環境学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Use of Ultraviolet Light activated AOPs to Degrade Humic substances in reservoir2020

    • Author(s)
      Yiming Fang、Hiroshi Sakai
    • Organizer
      令和2年度全国水道研究発表会
    • Related Report
      2020 Research-status Report
  • [Presentation] UV-activated Persulfate Process on the Degradation of Hydrophobic NOM with different UV Wavelength and Persulfate Dosage2020

    • Author(s)
      Yiming Fang, Hiroshi SAKAI
    • Organizer
      第54回日本水環境学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] 促進酸化処理を用いた炭素数別LASの分解反応及び水質との関係2020

    • Author(s)
      後藤遼太、酒井宏治
    • Organizer
      第54回日本水環境学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Change in Haloacetic Acid Formation Potential during UV and UV/H2O2 Treatment of Model Organic Compounds2019

    • Author(s)
      Hiroshi Sakai, Olivier Autin, Simon Parsons
    • Organizer
      The 7th IWA Specialist Conference on Natural Organic Matter in Water
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] UV-AOP Application into water treatment2019

    • Author(s)
      Hiroshi Sakai
    • Organizer
      Seoul Tokyo Forum
    • Related Report
      2019 Research-status Report
    • Invited

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

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