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Removal of Colloidal Particles by using Gelation Reaction of Sodium Alginate

Research Project

Project/Area Number 10650765
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 Industrial Chemistry, Associate Professor, 工業化学科, 助教授 (10151747)

Project Period (FY) 1998 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 2000: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1999: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1998: ¥1,000,000 (Direct Cost: ¥1,000,000)
Keywordssodium alginate / gel / colloid / difficult to filter / mud water shielding technique / expression / ion exchange / carboxy methyl cellulose / 圧密係数
Research Abstract

A novel technique utilizing the gelation reaction of natural polymers has been proposed for the separation of solid from liquid in difficult-to-filter colloidal suspensions. This technique is especially effective in the treatment of colloidal muddy water of high solid concentration, which is often produced as a byproduct of certain construction processes. Colloidal suspensions are mixed with a sodium alginate solution, and this mixture is added to a calcium chloride solution, resulting in the entrapping of colloidal particles by the calcium alginate gel. Gel suspensions are then drained gravitationally, followed by mechanical expression of gel particles. Fundamental aspects of this process are investigated using sodium bentonite as an experimental material. The alginate-bentonite mixture is added dropwise to the calcium solution. Decreasing the droplet size of the mixture expedites gelation since the diffusion of calcium ions into droplets determines the rate of gelation reactions. Reducing the alginate content expedites expression of the gel since alginate content is inversely proportional to the rate of expression. Carboxy methyl cellulose (CMC) as a stabilizer of bentonite mud water does not affect the gelation reaction, while the expression rate of the gel decreases with the increase in CMC content in the gel. This is due to the water retention capacity of CMC.

Report

(4 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • 1998 Annual Research Report
  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] IWATA Masashi: "Removal of Colloidal Particles utilizing Gelation Reaction of Sodium Alginate"Korean Journal of Chemical Engineering. 17巻5号. 574-578 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] IWATA Masashi: "Removal of Colloidal Particles by use of Gelation Reaction of Sodium Alginate"Proceedings of the 8^<th> World Filtration Congress. 1244-1247 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] IWATA Masashi: "Removal of Colloidal Particles utilizing Gelation Reaction of Sodium Alginate"Korean Journal of Chemical Engineering. Vol.17, No.5. 574-578 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] IWATA Masashi: "Removal of Colloidal Particles by use of Gelation Reaction of Sodium Alginate"Proceedings of the 8^<th>. World Filtration Congress. 1244-1247 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] IWATA Masashi: "Removal of Colloidal Particles utilizing Gelation Reaction of Sodium Alginate"Korean Journal of Chemical Engineering. 17巻5号. 574-578 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] IWATA Masashi: "Removal of Colloidal Particles by use of Gelation Reaction of Sodium Alginate"Proceedings of the 8^<th> World Filtration Congress. 1244-1247 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] Masashi IWATA: "Removal of colloidal particles by use of gelation reaction of sodium alginate"Proceedings of the 5th International Symposium on Separation Technology between Korea and Japan. 1031-1034 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Masashi IWATA: "Removal of colloidal particles by use of gelation reaction of sodium alginate" Proceedings of the 5th Korea-Japan Sympasium on Separation Technology. (印刷中). (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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