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1992 Fiscal Year Final Research Report Summary

Fundamental Study on Development of Anion Adsorbent of Anti-Hofmeister Type

Research Project

Project/Area Number 03650607
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 工業分析化学
Research InstitutionKUMAMOTO UNIVERSITY

Principal Investigator

JYO Akinori  Kumamoto University, Department of Applied chemistry, Professor, 工学部, 教授 (40038047)

Co-Investigator(Kenkyū-buntansha) HAYASHI Terumi  Kumamoto University, Department of Applied Chemistry, Assistant, 工学部, 助手 (70189653)
Project Period (FY) 1991 – 1992
KeywordsAnion exchanger / Macrocyclic polyamine / chelating resin / Cobalt / Hofmeister series / ion-selectivity / Nitrite / Thiocyanate
Research Abstract

Adsorbents for anions with anti-Hofmeister anion-selectivity sequences were developed based on cobalt(III) complex of the dioxocyclam (1,4,8,11-tetraazacyclotetradecane-5,7-dione) moiety. Significant results of this work can be summarized as follows:
(1) The cobalt(III) complex of dioxocyclam moiety selectively recognizes nitrite or thiocyanate in the presence of excess nitrate or perchlorate in weakly acidic aqueous solutions.
(2) The cobalt(III) complex of alkylated dioxocyclam (6-octadecyl-1,4,8,11-tetraazacyclotetradecane-5,7-dione) in chloroform extracts thiocyanate in preference to perchlorate from weakly acidic solutions, indicating an anti-Hofmeister anion selectivity.
(3) The hydrophobic cobalt(III) complex adsorbed on Amberlite XAD-7 also shows the anti-Hofmeister anion selectivity; the Amberlite XAD-7 modified with the complex mentioned above (2) takes up nitrite in the presence of nitrate in large excess. However, this approach is not promising, since the loading of the complex larger than ca. 0.3 mmol/g is difficult to achieve.
(4) The chelating resin (RGD), which was obtained by the reaction of dioxocyclam with macroreticular glycidyl methacrylate-divinylbenzene copolymer beads, adsorbs cobalt(III) up to 0.6 - 0.7 mmol/g. The cobalt(III) loaded RGD acts as an anion-exchanger with the anti-Hofmeister anion selectivity. For example, this newly developed anion-adsorbent takes up thiocyanate under conditions that molar ratio of thiocyanate to perchlorate is 1:10, while a conventional anion exchange resin adsorbs little thiocyanate under the same conditions. The adsorbed anions were easily and rapidly eluted with aqueous alkaline solutions, and columnar approach has clarified that repeated use of the adsorbent is also possible.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] Akinori Jyo: "Separation and Analysis of Anions Based on Anion Carriers" Analytical Sciences,Supplement Issue,Part I. 7. 69-70 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 城 昭典: "重金属汚染とキレート樹脂による浄化" 工業材料. 39. 51-57 (1991)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Akinori Jyo: "Chelating Resins Containing 1,4,8,11-Tetraazacyclotetradecane-5,7-dione Based on Crosslinked Copolymer Beads of the Macroreticular Type" Analytical Sciences. 8. 195-200 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Akinori Jyo: "Effect of Membrane Matrices on Performances of a Thiocyanate Ion-selective Electrode Based on the(5,10,15,20-Tetraphenylporphyrinato)manganese(III)Anion Carrier" Analytical Sciences. 8. 823-826 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Akinori Jyo: "Role of Membrane Media in Potentiometric Selectivity of Anion Carrier-based Ion-selective Electrodes" Sensors and Actuators B.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Akinori Jyo: "Separation and Analysis of Anions Based on Anion Carriers" Analytical Sciences(Supplement Issues Part 1). Vol.7. 69-70 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Akinori Jyo: "Pollution with Heavy Metal and Elimination of Heavy Metal Ions with Chelating Resins (Japanese)" Kogyozairyo (Engineering Materials). Vol.39,No.10. 51-57

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Akinori Jyo: "Chelating Resins Containing 1,4,8,11-Teraazacyclotetradecane-5,7-dione Based on Crosslinked Copolymer Beads of Macroreticular Type" Analytical Sciences. Vol.8,No.2. 195-200

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Akinori Jyo: "Effect of Membrane Matrices on Performances of a Thiocyanate Ion-selective Electrode Based on the (5,10,15,20-Tetraphenylporphyrinato)manganese(III) Anion Carrier" Analytical Sciences. Vol.8,No.6. 823-825

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Akinori Jyo: "Role of Membrane Media in Potentiometric Selectivity of Anion Carrier-based Ion-selective Electrodes" Sensors and Actuators B.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1994-03-24  

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