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Are excessively added chelating agents for heavy metal stabilization a safety valve or a pollution source in landfill sites?

Research Project

Project/Area Number 20K04755
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 InstitutionOsaka Metropolitan University (2022)
Osaka City University (2020-2021)

Principal Investigator

Mizutani Satoshi  大阪公立大学, 大学院工学研究科, 准教授 (80283654)

Co-Investigator(Kenkyū-buntansha) 貫上 佳則  大阪公立大学, 大学院工学研究科, 教授 (90177759)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords有機キレート剤 / 都市ごみ焼却飛灰 / 重金属 / 溶出試験 / 最終処分場 / 浸出水 / 内水ポンド / カラム試験 / シリアルバッチ試験 / キレート薬剤 / 余剰添加
Outline of Research at the Start

都市ごみ焼却飛灰中の重金属を安定化するためのキレート薬剤は,飛灰の性状変動に安全側で対応するために薬剤が過剰に添加される傾向にあり,最終処分場で溶出している可能性がある。本研究は,①処理飛灰からの余剰キレート薬剤の溶出挙動の把握,②浸出水中のキレート薬剤類縁物質の定性・定量評価,③焼却飛灰中の重金属濃度の変動把握とキレート薬剤の適正添加量の検討,④埋立地における余剰キレート薬剤と重金属との相互作用の評価,を行う事で過剰に添加されたキレート薬剤の最終処分場における利点と欠点を明らかにする。

Outline of Final Research Achievements

The leachate and the water of the inland water pond, the contact oxidation tank and the nitrification tank from the landfill site where municipal solid waste incineration ash was disposed, were analyzed once every two weeks for more than two years. Two types of chelating agents were detected, and their nitrification inhibitory properties were also confirmed. However, it was confirmed that the chelating agent was decomposed during the leachate treatment process, and the nitrification inhibitory effect was weakened.
Simulated stabilized fly ash was prepared by adding chelating agents in the range of 0 to 15 wt%, and serial batch test and column leach test were conducted. As a result, almost all of the excessively added chelating agent was eluted. Furthermore, the complexation constants of the chelating agents with lead, zinc, cadmium, and copper were determined, and the dissolution behavior was quantitatively discussed.

Academic Significance and Societal Importance of the Research Achievements

実浸出水中のキレート薬剤濃度を2年以上に渡って調べた知見は非常に貴重である。また過剰に添加されたキレート薬剤はほぼ全量が溶出すること,余剰キレートが浸出水中の重金属の安定化に効果があることを示したのは,国際的にも非常に意義が大きい。また,キレート薬剤の検出状況や硝化阻害性が浸出水プロセスで低下していくことを示したこと,キレート薬剤の重金属との錯体生成定数を求められたことは,最終処分場と焼却灰の適正管理を進めていく上で,社会的にも非常に有意義である。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (14 results)

All 2022 2021 2020

All Journal Article (4 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (10 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] 余水の窒素処理における有機キレート剤の影響2022

    • Author(s)
      貫上佳則、年見寛和、水谷聡
    • Journal Title

      都市清掃

      Volume: 75 Pages: 32-37

    • Related Report
      2022 Annual Research Report
  • [Journal Article] STUDY ON LEACHING PREVENTION OF HEAVY METALS FROM SIMULATED SEDIMENT BY STEELMAKING SLAG MIXING2021

    • Author(s)
      水谷聡、陳家盛、相原咲季
    • Journal Title

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

      Volume: 77 Issue: 7 Pages: III_385-III_392

    • DOI

      10.2208/jscejer.77.7_III_385

    • ISSN
      2185-6648
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Investigation of perfluoroalkyl carboxylic and sulfonic acids in leachates from industrial and municipal solid waste landfills, and their treated waters and effluents from their closest leachate treatment plants2021

    • Author(s)
      Hiroshi Kameoka, Koji Ito, Junko Ono, Arisa Banno, Chisato Matsumura, Yuki Haga, Kazuto Endo, Satoshi Mizutani, Yoshinori Yabuki
    • Journal Title

      Journal of Material Cycles and Waste Management

      Volume: 24 Issue: 1 Pages: 287-296

    • DOI

      10.1007/s10163-021-01319-z

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 焼却残渣に含まれるポリ塩化ナフタレンに関する研究動向2021

    • Author(s)
      水谷聡、伊藤耕二、矢吹芳教
    • Journal Title

      廃棄物資源循環学会誌

      Volume: 32(1) Pages: 41-49

    • NAID

      130008149325

    • Related Report
      2020 Research-status Report
  • [Presentation] 飛灰に過剰に添加されたキレート薬剤のカラム試験での溶出挙動2022

    • Author(s)
      田久保圭祐,水谷聡,大西亮太,年見寛和,貫上佳則
    • Organizer
      第33回廃棄物資源循環学会研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 都市ごみ焼却における熱回収残渣中の硫黄と塩素の含有量2022

    • Author(s)
      陳家盛,水谷聡,貫上佳則
    • Organizer
      第33回廃棄物資源循環学会研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 熱回収残渣を含む焼却残渣からのS及びClの溶出挙動2022

    • Author(s)
      水谷聡,陳家盛,田久保圭祐,
    • Organizer
      第22回環境技術学会年次大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] シリアルバッチ試験における薬剤処理飛灰からの有機キレート薬剤の溶出挙動2021

    • Author(s)
      田久保圭祐,水谷聡,貫上佳則
    • Organizer
      第21回環境技術学会年次大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 薬剤処理飛灰からの有機キレート薬剤と金属類の経時的な溶出挙動2021

    • Author(s)
      田久保圭祐,水谷聡,年見寛和,貫上佳則
    • Organizer
      第32回廃棄物資源循環学会研究発表会
    • Related Report
      2021 Research-status Report
  • [Presentation] 海面埋立処分場における有機キレート薬剤の存在実態とpHによる安定性2021

    • Author(s)
      貫上佳則,年見寛和,水谷聡
    • Organizer
      第32回廃棄物資源循環学会研究発表会
    • Related Report
      2021 Research-status Report
  • [Presentation] Can the use of a riffle sampler reduce the variability in metal content of bottom ash from municipal solid waste incinerator?2021

    • Author(s)
      Satoshi Mizutani
    • Organizer
      The 32nd Annual Conference of JSMCWM (3RINCsAutumn2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Congener distribution of polychlorinated naphthalenes in municipal solid waste incineration fly ash2021

    • Author(s)
      Satoshi Mizutani, Ryotaro Naoi, Saki Aihara, Koji Ito, Yoshinori Yabuki, Yoshinori Kanjo
    • Organizer
      The 7th 3R International Scientific Conference on Material Cycles and Waste Management (3RINCs2021)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Survey on per- and polyfluoroalkyl substances in leachates and treatment processes in waste landfill site2021

    • Author(s)
      Yoshinori Yabuki, Hiroshi Kameoka, Koji Ito, Kazuto Endo, Satoshi Mizutani
    • Organizer
      The 7th 3R International Scientific Conference on Material Cycles and Waste Management (3RINCs2021)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 焼却飛灰に含まれるポリ塩化ナフタレンの同族体・異性体の存在割合2020

    • Author(s)
      直井亮太郎、水谷聡、相原咲季、伊藤耕二、矢吹芳教、貫上佳則
    • Organizer
      第20回環境技術学会年次大会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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