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Immobilization by sulfuration of waste heavy metals

Research Project

Project/Area Number 13450316
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 化学工学一般
Research InstitutionNagoya University

Principal Investigator

MATSUDA Hitoki  Nagoya University, Research Center For Advanced Waste And Emission Management, Professor, 難処理人工物研究センター, 教授 (80115633)

Co-Investigator(Kenkyū-buntansha) 小澤 祥二  名古屋大学, 難処理人工物研究センター, 助手 (00303678)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2002: ¥1,300,000 (Direct Cost: ¥1,300,000)
Keywordsimmobilization / heavy metal / sulfuration / sulfur / fly ash / sodium hydroxide / calcium hydroxide / asphalt / 廃プラスチック / 重金属含有廃棄物 / 都市ゴミ溶融飛灰
Research Abstract

The present study is concerned with a novel method to immobilize and deposit heavy metals contained in fly ash from waste incineration facilities.
The toxic heavy metals such as lead and zinc are present as soluble compounds in fly ash such as metal chlorides and oxides. This study was based on the fact that heavy metals naturally exist as insoluble sulfides and that asphalt is water-repellent. We propose the physical and chemical immobilization of waste heavy metals by mixing with asphalt, sulfur and alkaline agents-sodium hydroxide and calcium hydroxide, in a bi-axial kneader heated at 403-523K.
Calculations on the Gibbs' free energies showed that sulfuration of heavy metals resulted from the formation of either sodium sulfide or calcium sulfide via the reaction of sulfur with alkaline agents. Experimental results from XRD analysis of soluble metal compounds mixed with sulfur and alkaline agents also indicated that soluble metal compounds were convertable to insoluble metal sulfides only if either sodium sulfide or calcium sulfide is initially formed. It was found that the addition of sulfur and sodium hydroxide into fly ash at 403K led to the sulfuration of heavy metals. Similarly, the addition of sulfur and calcium hydroxide at 523K brought about sulfuration of heavy metals. The results of the leachability test for the treated fly ash by the proposed immobilization method indicated that leaching of heavy metals in fly ash was suppressible.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] K.Sawada, H.Matsuda, M.Mizutani: "Immobilization of lead compounds involved in fly ash by mixing with asphalt, sulfur and sodium hydroxide"Journal of Chemical Engineering of Japan. 34. 878-883 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 澤田佳代, 神田真吾, 松田仁樹, 水谷 眞: "硫黄と水酸化カルシウムとの混練処理による飛灰中に含まれる鉛の硫化物固定化"化学工学論文集. 29. 287-293 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 澤田佳代, 神田真吾, 松田仁樹: "廃プラスチックを硫化物化媒体/固化材とした飛灰中鉛化合物の固定化"化学工学論文集. (掲載予定). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Sawada, H.Matsuda, M.Mizutani: "Immobilization of lead compounds involved in fly ash by mixing with asphalt, sulfur and sodium hydroxide"Journal of Chemical Engineering of Japan. Vol.34. 878-883 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Sawada, S.Kanda, H.Matsuda, M.Mizutani: "Immobilization by sulfuration of lead compounds in fly ash by mixed with sulfur and calcium hydroxide"Kagaku Kogaku Ronbunshu. Vol.29. 287-293 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] K.Sawada, S.Kanda, H.Matsuda: "Stabilization of lead compounds in fly ash by using waste plastic as sulfuration/solidification matrix"In press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 澤田佳代, 神田真吾, 松田仁樹, 水谷 眞: "硫黄と水酸化カルシウムとの混練処理による飛灰中に含まれる鉛の硫化物固定化"化学工学論文集. (掲載決定). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 澤田佳代, 神田真吾, 松田仁樹: "廃プラスチックを硫化物化媒体/固化材とした飛灰中鉛化合物の固定化"化学工学論文集. (掲載決定). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Kayo SAWADA, Hitoki MATSUDA, Makoto MIZUTANI: "Immobilization of Lead Compounds in Fly Ash by Mixing with Asphalt, Sulfur and Sodium Hydroxide"Journal of Chemical Engineering of Japan. Vol.34, No.7. 878-883 (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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