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Removal process of colloidal particles from colloidal suspensions by use of particle immobilization in calcium alginate gel

Research Project

Project/Area Number 13650835
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 反応・分離工学
Research InstitutionSuzuka National College of Technology

Principal Investigator

IWATA Masashi  Suzuka National College of Technology, Dept. of Chemistry and Biochemistry, Associate Professor, 生物応用化学科, 助教授 (10151747)

Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2003: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2002: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2001: ¥900,000 (Direct Cost: ¥900,000)
Keywordsalginic acid / gel / colloid / bentonite / PMMA / solid liquid separation / filtration / expression
Research Abstract

A novel technique utilizing particle immobilization in hydrogels has been proposed for a solid-liquid separation of difficult-to-filter colloidal suspensions. Fundamental aspects of this process are investigated using sodium bentonite/PMMA as experimental materials. The alginate-bentonite/PMMA mixture is added dropwise to a calcium chloride solution, resulting in calcium alginate gels. Colloidal particles are immobilized in the gels. The gel suspension is dehydrated gravitationally, followed by mechanical expression of the gel particles. During the expression, the colloidal particles remain in the gels and the expressed liquid is clear. The expressed cake is then discarded. When an alginate concentration in the droplets is above 1000 ppm, submicron particles are perfectly entrapped in calcium-alginate gels. Decreasing the droplet size of the mixture expedites gelation since the diffusion of calcium ions into the droplets determines the rate of gelation reaction. Reducing the alginate content in the gels accelerates expression of the bentonite/PMMA gels. Monovalent metal ions in a colloidal suspension do not affect the immobilization reaction. Divalent and trivalent metal ions in a colloidal suspension interfere the immobilization reaction; i.e., they yield metal-alginate gels, before the sodium alginate solution and the colloidal suspension are mixed completely. For the perfect immobiUzation of colloidal particles, multi-valent ions in the colloidal suspension should be masked by use of a chelating agent. pH of colloidal suspension does not affect the process.

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] Masashi Iwata: "Solid-Liquid Separation by Use of Particle Immobilization in Calcium Alginate"Separation Science of Technology. 38. 837-850 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Masashi Iwata: "Formation and Expression of Calcium Alginate Gel Entrapping Colloidal Particles"Proceedings of World Congress on Particle Technology 4. 192 1-192 8 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Masashi Iwata: "Optimization of Entrapment Process of Colloidal Particles into Ca-Alginate Gels"Proceedings of the 6th International Symposium on Separation Technology between Korea and Japan. 1025-1028 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Masashi Iwata: "Enhanced Removal of Colloidal Particles Using Gelation Reaction of sodium Alginate"Proceedings of International Conference on Emerging Solid/Liquid Separation Technologies 2002. 82-88 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Iwata, M.: "Solid-Liquid Separation by Use of Particle Immobilization in Calcium Alginate"Separation Science and Technology. 38(4). 837-850 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Iwata, M.: "Formation and Expression of Calcium Alginate Gel Entrapping Colloidal Particles"Proceedings of World Congress on Particle Technology 4. No.192(8 pages). 837-850 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Iwata, M.: "Optimization of Entrapment Process of Colloidal Particles into Ca-Alginate Gels"Proceedings of the 6th International Symposium on Separation Technology between Korea and Japan. 1025-1028 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Iwata, M.: "Enhanced Removal of Colloidal Particles Using Gelation Reaction of Sodium Alginate"Proceedings of International Conference on Emerging Solid/Liquid Separation Technologies 2002. 82-88

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Masashi Iwata: "Solid-Liquid Separation by Use of Particle Immobilization in Calcium Alginate"Separation Science and Technology. 38巻4号. 833-846 (2003)

    • Related Report
      2002 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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