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Development of anion exchanger containing gold nanoparticles to enable rapid purification of groundwater contaminated with nitrate

Research Project

Project/Area Number 21H01709
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 27030:Catalyst and resource chemical process-related
Research InstitutionHokkaido University

Principal Investigator

KAMIYA YUICHI  北海道大学, 地球環境科学研究院, 教授 (10374638)

Co-Investigator(Kenkyū-buntansha) 大友 亮一  北海道大学, 地球環境科学研究院, 准教授 (10776462)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000)
Fiscal Year 2023: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2022: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2021: ¥11,180,000 (Direct Cost: ¥8,600,000、Indirect Cost: ¥2,580,000)
Keywords地下水汚染 / 硝酸態窒素 / 陰イオン交換体 / 金ナノ粒子 / 硝酸還元反応 / アニオン交換体 / 4級アンモニウム / 汚染地下水 / イオン交換体 / 金微粒子 / 還元反応 / アニオン交換樹脂 / 硝酸イオン還元 / 金属微粒子 / 汚染地下水浄化
Outline of Research at the Start

本研究では、アニオン交換体と金属触媒の利点を併せ持つ金属微粒子を内包したアニオン交換体を開発し、硝酸イオンで汚染された地下水の浄化を試みる。 この金属微粒子内包アニオン交換体を使った地下水浄化システムは、オンサイト(家庭や井水取水場など)での汚染地下水からの硝酸イオン迅速除去と、オフサイト(再生工場)での二次廃水を生じないアニオン交換体の再生を可能にする。

Outline of Final Research Achievements

AuCl4- was introduced into an anion exchange resin (AER) through ion-exchange reaction and then treated in H2 at 353 K to generate Au nanoparticles inside the AER. The resulting Au nanoparticle-loaded AER (Au@AER) rapidly incorporated NO3- in water by ion exchange reaction. The Au nanoparticles in AER hardly changed the ion exchange properties of the resin. NO3- taken in Au@AER was mainly decomposed to N2O by contacting Au@AER with H2 at 353 K. This treatment restored the ion exchange capacity of Au@AER, which could be used repeatedly for NO3- removal and decomposition without performance degradation at least five uses.

Academic Significance and Societal Importance of the Research Achievements

硝酸態窒素(NO3-)による地下水の汚染が問題になっており、その浄化法の開発は急務である。すでに、イオン交換樹脂を用いた水中NO3-のイオン交換除去や水中のNO3-を直接、触媒を用いて分解する方法が確立されている。しかし、前者は再生液を使った使用済み樹脂の再生が必要なこと、後者は処理速度が遅く、かつアンモニアが副生する問題を抱えており、新たな方法が求められている。本研究で開発されたAu@AERを用いることで、イオン交換反応によって汚染水からNO3-を迅速に除去することができ、かつ使用済Au@AERの再生には再生液を必要とせず、NO3-分解速度も速いため、社会実装が大いに期待される。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (9 results)

All 2024 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Presentation (7 results) (of which Int'l Joint Research: 4 results,  Invited: 3 results)

  • [Int'l Joint Research] 国立台湾大学(その他の国・地域(台湾))

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Uniformly Distributed Palladium Nanoparticles on NH2‐MIL‐53 Fabricated by an Equilibrium Adsorption Method for Reduction of Nitrite in Water2024

    • Author(s)
      Huang Yuan、Kim Wontae、Otomo Ryoichi、Shimoda Shuhei、Wu Kevin C.-W.、Kamiya Yuichi
    • Journal Title

      ChemCatChem

      Volume: - Issue: 16

    • DOI

      10.1002/cctc.202400315

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 吸着除去と接触分解の組み合わせ による水汚染物質の分解2024

    • Author(s)
      神谷裕一
    • Organizer
      第34回規則性多孔体セミナー
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Decomposition of nitrate over Au incorporated anion-exchange resin with a two-step process2023

    • Author(s)
      Bobo Yan, Koki Kato, Ryoichi Otomo, Yuichi Kamiya
    • Organizer
      The 19th Korea-Japan Symposium on Catalysis (19KJSC)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Removal and decomposition of nitrate over anion-exchange resin containing gold nanoparticles toward purification of groundwater2023

    • Author(s)
      Bobo Yan, Koki Kato, Ryoichi Otomo, Yuichi Kamiya
    • Organizer
      第61回オーロラセミナー
    • Related Report
      2023 Annual Research Report
  • [Presentation] Removal and decomposition of nitrate over anion-exchange resin containing gold nanoparticles toward purification of groundwater polluted with nitrate2022

    • Author(s)
      Bobo Yan, Koki Kato, Ryoichi Otomo, Yuichi Kamiya
    • Organizer
      12th International Conference on Environmental Catalysis (ICEC2002)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Removal and reduction of nitrate over anion-exchange resin incorporating gold nanoparticles toward purification of groundwater polluted nitrate2022

    • Author(s)
      Bobo Yan, Koki Kato, Ryoichi Otomo, Yuichi Kamiya
    • Organizer
      化学系学協会北海道支部2022年冬季研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Catalytic and photocatalytic reduction of nitrate in water for purification of polluted groundwater2021

    • Author(s)
      Yuichi Kamiya
    • Organizer
      18th Japan-Korea Symposium on Catalysis (18JKSC)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Catalytic and photocatalytic remediation of groundwater polluted with nitrate2021

    • Author(s)
      Yuichi Kamiya
    • Organizer
      The 4th International Conference on Chemical Sciences
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited

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

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