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Insolubility of Hazardous Heavy Metals in Wet Fly Ashes of MSW

Research Project

Project/Area Number 09650612
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Civil and environmental engineering
Research InstitutionFukuoka University

Principal Investigator

SHIMAOKA Takayuki  Fukuoka University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (80202109)

Co-Investigator(Kenkyū-buntansha) MIYAWAKI Kentaro  Fukuoka University, Faculty of Engineering, Assistant, 工学部, 助手 (00289521)
SOEDA Masashi  Fukuoka University, Faculty of Engineering, Assistant, 工学部, 助手 (50148871)
HANASHIMA Masataka  Fukuoka University, Faculty of Engineering, Professor, 工学部, 教授 (70078624)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1998: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1997: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsFly ash / Heavy metal / Insolubility / Aging / Passing of carbon dioxide / Elution test / Dependency of pH / エイジング
Research Abstract

In this research, moisturized fly ashes have been placed and left at loal tcmpeatures, and as the elution test results show, it was found that hazardous heavy metals such as Pb and Cd had become insoluble in a process we have called" Fly ashes self-stabilization". The experiments conducted with 48 diferent samples from all over Japan indicate that this stabilization dose not depend on the type of incineration plant or method of exhaust gas treatment. Under this stabilization process, as the heavy metals became insoluble, pH and alkalinity of the fly ashes solution also decreased After 30 days, from the results of the pH depended test, it was clear that the amount of released heavy metals in the wet samples was lower than the original dy samples. Therefore, we concluded that the heavy metals hal been trapped into chemical stable compounds. Also the higher the concentration of CO_2 in the air ( within a range 0*CO_2*30%), the faster the heavy metals became insoluble. As a conclusion, the expenment results suggest that the heavy metals were trapped in the carbonates formed by the reaction between CO_2 and other chemical compounds.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 島岡隆行 他: "廃棄物埋立地における薬剤処理飛灰の有害重金属安定性に関する研究" 廃棄物学会論文誌. Vol.9, No.6. 264-273 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 島岡隆行 他: "都市ごみ湿潤飛灰中の有害重金属の不溶化" SWANA's Wastecon 1998. 419-481 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 島岡隆行 他: "焼却飛灰の水混練に伴う鉛の不溶化現象について" 第18回全国都市清掃研究発表会講演論文集. 44-46 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 島岡隆行 他: "焼却飛灰の水混練に伴う鉛の不溶化現象について(その2)" 廃棄物学会第8回研究発表会. 692-694 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 島岡隆行 他: "焼却飛灰の水混練に伴う鉛の不溶化現象について(その3)" 第19回全国都市清掃研究発表会講演論文集. 40-42 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Shimaoka, K.Oku, K.Miyawaki, M.Hanashima, K.Matsumoto, K.Furukawa, T.Uchida: "Stability of Hazardous Heavy Metals in Landfilled Fly Ash Immobilized by Chemicals" Journal of the Japan Society of Waste Management Experts. Vol.9, No.6. 264-273 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Shimaoka, K.Miyawaki, M.Hanashima, T.Yoshida, I.Ito, T.Uchida: "Insolubility of Hazardous Heavy Metals in Wet Fly Ash of Municipal Solid Waste" SWANA's Wastecon 1998. 419-431 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Shimaoka, K.Miyawaki, M.Hanashima, T.Uchida, Y.Hori: "Insolubility of Hazardous Heavy Metals in Wet Fly Ash for incineration" Proceedings of Japan Waste Management Association's conference.44-46 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Shimaoka, K.Miyawaki, M.Hanashima, T.Uchida, I.Ito, T.Yoshida: "Insolubility of Hazardous Heavy Metals in Wet Fly Ash for incineration(2)" Proceedings of Japan Society of Waste Management Experts conference. 692-694 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] T.Shimaoka, K.Miyawaki, M.Hanashima, T.Uchida, I.Ito, T.Yoshida: "Insolubility of Hazardous Heavy Metals in Wet Fly Ash for incineration(3)" Proceedings of Japan Waste Management Association's conference. 40-42 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary

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Published: 1997-04-01   Modified: 2016-04-21  

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