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Development of Novel Porous Phosphorous Adsorbent by Effective Uses of Waste Cement and Flyash

Research Project

Project/Area Number 15560707
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Recycling engineering
Research InstitutionKyoto Institute of Technology

Principal Investigator

SHIOMI Haruhisa  Kyoto Institute of Technology, Faculty of Engineering and Technology, Lecturer, 工芸学部, 講師 (60215952)

Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2004: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2003: ¥2,400,000 (Direct Cost: ¥2,400,000)
KeywordsMechano-chemical treatment / wollastnite / carbonation treatment / phosphorous adsorbent / water purification / waste cement / fly ash / hydroxyapatite / メカのケミカル処理 / 廃石膏
Research Abstract

Mechano-chemically activated wollastnite powder was used as a starting material to obtain consolidated bodies by a carbonation method. Fly ash as aggregate and hydrated cement as a calcium resource were added to wollastnite in order to improve the phosphorus removal property of the consolidated bodies. The wollastnite consolidated bodies obtained these additives showed higher phosphorus removal ratio than that of pure wollastnite. However, the sample obtained at low carbonation temperature generates fine HAP precipitate in a phosphoric acid aqueous solution due to significant increase in pH. On the other hand, when the carbonation temperature is high, the phosphorus removal ratio markedly decreased. This is caused by the decrease in the dissolved calcium ion concentration due to the carbonation of calcium hydroxide in cement. Therefore, the precise control of carbonation conditions is necessary when the hydrated cement as a calcium resource.
When gypsum was used as a calcium resource instead of hydrated cement, the phosphorus removal ratio was independent of the carbonation temperature and higher than that of pure wollastnite. The sample containing gypsum did not generate fine HAP precipitation regardless carbonation temperature. Moreover, the sample containing gypsum showed satisfied phosphorus removal ratio at 25% amount of pure wollastnite.
The cyclic immersion test in the phosphoric acid aqueous solution showed the significant decrease of the phosphorus removal ratio with increasing immersion cycle. Five times of immersion decreased the phosphorus removal ratio of the sample to 50% of initial value. However, the phosphorus removal ratio deteriorated sample was recovered to 95% of initial value by washing the sample in 0.005mol/l hydrochloric acid to remove HAP precipitated on the surface of the sample.

Report

(3 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • Research Products

    (5 results)

All 2005 2004 2003 Other

All Journal Article (4 results) Publications (1 results)

  • [Journal Article] メカノケミカル処理したケイ酸カルシウムを用いたリン吸着材の開発2005

    • Author(s)
      塩見治久 他4名
    • Journal Title

      材料 53巻6号

      Pages: 618-622

    • NAID

      110006266294

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] CO_2処理によるCaSiO_3の固化機構2004

    • Author(s)
      高田優子 他7名
    • Journal Title

      材料 52巻6号

      Pages: 571-575

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Development of Phosphorous Adsorbent Using Mechano-Chemically Treated Calcium Silicate2004

    • Author(s)
      H.Shiomi, H.Mukai, M.Masui, Y.Hashizume, Y.Akita
    • Journal Title

      Journal of THE SOCIETY OF MATERIALS SCIENCE JAPAN Vol.53, No.6

      Pages: 618-622

    • NAID

      110006266294

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Consolidation Mechanism of Calcium Silicate on Exposure to Carbon Dioxide2003

    • Author(s)
      Y.Takada, H.shiomi, T.Isshiki, T.Shiono, M.Kitamura, T.Oosugi, M.Kamitani
    • Journal Title

      Journal of THE SOCIETY OF MATERIALS SCIENCE JAPAN Vol.52, No.6

      Pages: 571-575

    • NAID

      110002302135

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] 塩見治久 他4名: "メカノケミカル処理したケイ酸カルシウムを用いたリン吸着材の開発"材料. 58巻6号(未定). (2005)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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