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Test methods for evaluating the influence of redox conditions on leaching of toxic chemicals from geomaterials

Research Project

Project/Area Number 19H02236
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 22030:Geotechnical engineering-related
Research InstitutionOsaka University

Principal Investigator

Inui Toru  大阪大学, 工学研究科, 教授 (90324706)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥12,870,000 (Direct Cost: ¥9,900,000、Indirect Cost: ¥2,970,000)
Fiscal Year 2021: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2020: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2019: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
Keywords地下水汚染 / 溶出 / 吸・脱着 / 酸化還元反応 / 重金属
Outline of Research at the Start

再生資材の有効利用や土壌汚染対策完了の判断において地下水汚染リスクを評価する際、地中固有の環境条件において土-間隙水界面で生じる有害物質の吸着・脱着作用、およびその結果としての有害物質の溶出挙動の把握が必須である。様々な要因が溶出挙動に影響することが知られているが、室内試験での評価が依然として困難である酸化還元反応の影響に着目し、影響が支配的となる条件(対象地盤材料、有害物質の形態、環境条件)の同定、評価試験方法の確立を目的とした実験的検討を行うものである。

Outline of Final Research Achievements

Recycled geomaterials, and excavated soils/rocks often contain anthropogenic and geogenic toxic elements, although their concentrations are very low. To promote their sustainable material cycles in construction works, environmental suitability needs to be verified. This research presents the laboratory testing results to evaluate the effects of redox reactions on the leachability and mobility of toxic elements, to predict these effects appropriately by modifying the existing leaching tests as the new testing methods. In addition, to propose cost-effective remedial options against the leaching of heavy metals mobilized by oxidation reactions, long-term performance of the immobilization treatment for the acidic excavated rock was experimentally verified. Also, numerical simulations were conducted to propose appropriate configurations for the embankment structures containing the soils and rocks with geogenic contamination to limit the oxidation due to rainfall infiltration.

Academic Significance and Societal Importance of the Research Achievements

地盤材料には有害物質が様々な形態で存在するため,地中環境に伴う酸化還元条件が溶出挙動に及ぼす影響を考慮して環境安全性の評価を行う必要がある.本研究は,地盤材料の粒径や試験スケールと酸化反応とそれに伴う重金属溶出量との定量関係を明らかにした点,従来評価が困難であった還元反応が有害物質の溶出挙動に及ぼす影響を評価しうる試験法を提案した点に学術的意義があるといえる.さらに,酸化還元反応の影響を適切に評価しうる試験方法の提案,対策方法を提示したことは,微量の有害物質を含有する地盤材料の環境安全性を適切に管理した上で資源としての有効利用に貢献しうる点で社会的意義があると考える.

Report

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

    (25 results)

All 2022 2021 2020 2019

All Journal Article (9 results) (of which Peer Reviewed: 6 results,  Open Access: 4 results) Presentation (16 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] 不溶化処理した酸性岩石を対象とした長期タンクリーチング試験による溶出特性2021

    • Author(s)
      高田 孟, 緒方 奨, 乾 徹, 尾花 誠一, 岡田 文夫
    • Journal Title

      第14回環境地盤工学シンポジウム論文集

      Volume: - Pages: 65-68

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 自然由来重金属含有掘削物を利用した盛土への降雨浸透を抑制しうる覆土構造の検討2021

    • Author(s)
      南口和真, 緒方 奨, 乾 徹, 加藤智大, 勝見 武
    • Journal Title

      地下水地盤環境・防災・計測技術に関するシンポジウム論文集

      Volume: - Pages: 190-195

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Acid buffering and arsenic leaching behaviours of excavated acid rock treated by the MgO based immobilization material2021

    • Author(s)
      Takata, T., Du, X,m Inui, T., Ogata, S., Mori, H.
    • Journal Title

      Proceedings of the 19th Japan-Korea-France-Canada Joint Seminar on Geoenvironmental Engineering

      Volume: - Pages: 377-384

    • Related Report
      2021 Annual Research Report
  • [Journal Article] 土壌・地下水汚染対策に適用される遮水技術2021

    • Author(s)
      乾徹
    • Journal Title

      防水ジャーナル

      Volume: 第52巻5号 Pages: 84-90

    • Related Report
      2020 Annual Research Report
  • [Journal Article] 重金属吸着能を有するジオテキスタイル材の不飽和浸透特性を考慮した吸着性能評価2021

    • Author(s)
      魚見太志, 村中隆之介, 乾徹, 緒方奨, 板谷裕輝, 中村丞吾
    • Journal Title

      ジオシンセティックス論文集

      Volume: 36 Pages: 125-132

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Leaching behavior of naturally-contained arsenic in marine sediment by the long-term column percolation test2020

    • Author(s)
      KATAYAMA Jun’ichi、INUI Toru、KATSUMI Takeshi、TAKAI Atsushi
    • Journal Title

      Japanese Geotechnical Journal

      Volume: 15 Issue: 4 Pages: 675-682

    • DOI

      10.3208/jgs.15.675

    • NAID

      130007964598

    • ISSN
      1880-6341
    • Year and Date
      2020-12-31
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Long-Term Leaching Behavior of Marine Sediment by a Large Column Percolation Test2020

    • Author(s)
      乾 徹・堀 睦・勝見 武・髙井 敦史
    • Journal Title

      Journal of the Society of Materials Science, Japan

      Volume: 69 Issue: 1 Pages: 53-56

    • DOI

      10.2472/jsms.69.53

    • NAID

      130007787255

    • ISSN
      0514-5163, 1880-7488
    • Year and Date
      2020-01-15
    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 土壌汚染対策における環境リスクの評価・管理とその課題2020

    • Author(s)
      乾徹
    • Journal Title

      地盤工学会誌

      Volume: 68, 3 Pages: 10-11

    • Related Report
      2019 Annual Research Report
    • Open Access
  • [Journal Article] 土壌および岩石中の重金属等の全含有量試験方法に関する一考察2019

    • Author(s)
      宮口新治、乾徹、品川俊介
    • Journal Title

      第13回環境地盤工学シンポジウム発表論文集

      Volume: - Pages: 191-198

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] スレーキングの進行が堆積岩中の自然由来砒素の溶出特性に及ぼす影響の基礎的検討2022

    • Author(s)
      乾徹
    • Organizer
      第27回地下水・土壌汚染とその防止対策に関する研究集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Influences of chemically-dominated redox condition on the leaching behavior of arsenic contained in sediments2022

    • Author(s)
      Yiming Zhang
    • Organizer
      第57回地盤工学研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 自然由来重金属含有掘削物による盛土構造物を対象とした降雨浸透挙動の解析的検討2022

    • Author(s)
      南口和真
    • Organizer
      第57回地盤工学研究発表会
    • Related Report
      2021 Annual Research Report
  • [Presentation] シリアルバッチ試験によるスレーキングに伴う堆積岩中の自然由来砒素溶出特性の評価2022

    • Author(s)
      西田汐音
    • Organizer
      2022年度土木学会関西支部年次学術講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Leaching behavior of natural-originated arsenic in marine sediments by the long-term batch leaching tests with sodium ascorbate2022

    • Author(s)
      Yiming Zhang
    • Organizer
      20th Global Joint Seminar on Geo-Environmental Engineering
    • Related Report
      2021 Annual Research Report
  • [Presentation] Scaling effects on arsenic, copper, and lead release from excavated hydrothermally altered rocks2022

    • Author(s)
      Xun Du
    • Organizer
      20th Global Joint Seminar on Geo-Environmental Engineering
    • Related Report
      2021 Annual Research Report
  • [Presentation] Acid buffering and arsenic immobilization performances of MgO based agents for excavated acid rock2021

    • Author(s)
      乾徹
    • Organizer
      3rd International Symposium on Coupled Phenomena in Environmental Geotechnics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Acid buffering and arsenic leaching behaviours of excavated acid rock treated by the MgO based immobilization material2021

    • Author(s)
      乾徹
    • Organizer
      19th Global Joint Seminar on Geo-Environmental Engineering
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 重金属吸着特性を有するジオシンセティックス材の水理特性の評価2021

    • Author(s)
      村中隆之介
    • Organizer
      第56回地盤工学研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 自然由来重金属等を含む掘削ずりを盛土利用する際の覆土構造の検討2021

    • Author(s)
      南口和真
    • Organizer
      第56回地盤工学研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 重金属吸着特性を有するジオシンセティックス材の水分保持特性の評価2021

    • Author(s)
      村中隆之介
    • Organizer
      2021年度土木学会関西支部年次学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 自然由来重金属等を含む掘削ずりを盛土利用する際の覆土構造の検討2021

    • Author(s)
      南口和真
    • Organizer
      2021年度土木学会関西支部年次学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 不溶化処理した酸性岩石の砒素溶出および酸性水発生抑制効果2020

    • Author(s)
      高田孟、緒方奨、乾徹、尾花誠一
    • Organizer
      2020年度土木学会関西支部年次学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 重金属吸着能を有するジオシンセティックス材の基本吸着特性2020

    • Author(s)
      魚見太志、緒方奨、乾徹、國西健史、秋山達志
    • Organizer
      2020年度土木学会関西支部年次学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 不溶化処理した粒度の異なる酸性岩石の砒素溶出特性および酸性水発生抑制効果2020

    • Author(s)
      高田孟、緒方奨、乾徹、尾花誠一
    • Organizer
      第55回地盤工学研究発表会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 吸着能を有するジオシンセティックス複合材の砒素吸着性能とその時間依存性2020

    • Author(s)
      魚見太志、緒方奨、乾徹
    • Organizer
      土木学会第75回年次学術講演会
    • Related Report
      2019 Annual Research Report

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

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