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Development of Reusable Adsorbent for Environmental Hazardous Materials by Novel Synthesis Method

Research Project

Project/Area Number 18560723
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Properties in chemical engineering process/Transfer operation/Unit operation
Research InstitutionHiroshima University

Principal Investigator

GOTO Takehiko  Hiroshima University, Graduate School of Engineering, Assistant Professor (10274127)

Co-Investigator(Kenkyū-buntansha) IIZAWA Takashi  Hiroshima University, Graduate School of Engineering, Associate Professor (60130902)
Project Period (FY) 2006 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥2,640,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2006: ¥1,600,000 (Direct Cost: ¥1,600,000)
Keywordsthermosensitive gel / hydrophobic interactions / endocrine disrupters / adsorption / desorption / porous structure / phosphoric acid / N-isopropylacrylamide / N-イソプロピルアクリルアミ / イオン性高分子 / pH制御 / 再資源化 / pH応答
Research Abstract

The thermosensitive gel turns into hydrophobic above transition temperature and adsorbs the endocrine disrupters, most of which are hydrophobic, by hydrophobic interactions. The adsorbent for phosphoric acid was synthesized from thermosensitive polymer (N-isopropylacrylamide) and the polymer tertiary with amino group. The effects of the gel structure and the copolymerization of hydrophobic or hydrophilic polymer with the gel on the adsorption and desorption properties of thermosensitive gel are investigated. It was found that the endocrine disrupters (Bisphenol-A) were successfully adsorbed onto the porous thermosensitive gel.
Adsorption rate of Bisphenol-A on the gel is improved by the porous structure of the gel and the copolymerization of hydrophobic polymer with the gel increase the adsorption amount of Bisphenol-A, whereas the copolymerization of hydrophilic polymer decrease the adsorption amount of Bisphenol-A at the same temperature. Nobel pH-thermosensitive gel adsorbent for phosphoric acid has been developed and its adsorption/desorption property was also investigated in this research. The adsorption/desorption mechanism is considered as follows: Univalent phosphoric acid is adsorbed to ionized tertiary amino groups of the adsorbent at low pH. When the pH is raised, the valence of the phosphoric acid then changes to divalent from univalent. The divalent phosphoric acid is desorbed because the degree of ionization of the tertiary amino groups of the gel is decreased at high pH. In addition, when this gel is heated above the lower critical solution temperature (LCST), phosphoric acid is desorbed by shrinkage of the gel. It was found that the amount of adsorption of phosphoric acid increased with decreasing initial pH value because the tertiary amino groups were not completely ionized at high pH. Therefore, more phosphoric acid was adsorbed at a low pH than at a high pH. The amount of desorption increased with an increase in the initial pH.

Report

(3 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • Research Products

    (22 results)

All 2008 2007 2006

All Journal Article (2 results) Presentation (20 results)

  • [Journal Article] Adsorption /Desorption Properties of Hydrophobic Molecules on Porous Thermosensitive Gel2006

    • Author(s)
      Takehiko Gotoh
    • Journal Title

      Polymer Networks Group Conference 2006 1

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Adsorption /Desorption of Phosphoric Acid on Novel Thermosensitive Gel Adsorbent2006

    • Author(s)
      Takuya Arase
    • Journal Title

      Polymer Networks Group Conference 2006 1

    • Related Report
      2006 Annual Research Report
  • [Presentation] Effect of Synthesis Conditions of Thermosensitive Gel on Adsorption/Desorption Properties of Endocrine Disrupters2008

    • Author(s)
      Masato, Taira, Takehiko, Gotoh, Shuji, Sakohara
    • Organizer
      Yamaguchi Meeting of SCEJ
    • Place of Presentation
      Yamaguchi University
    • Year and Date
      2008-11-22
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 第3級アミン共重合感温性ゲルによるリン酸の吸着分離2008

    • Author(s)
      後藤健彦, 荒瀬卓也, 迫原修治
    • Organizer
      化学工学会第73年会
    • Place of Presentation
      静岡大学
    • Year and Date
      2008-03-17
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
  • [Presentation] 感温性ゲルによる内分泌攪乱化学物質の吸脱着速度の検討2008

    • Author(s)
      平良真人, 後藤健彦, 迫原修治
    • Organizer
      化学工学会第73年会
    • Place of Presentation
      静岡大学
    • Year and Date
      2008-03-17
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
  • [Presentation] Adsorption of Phosphoric Acid on Tertiary Amine Copolymerized Thermosensitive Gel Adsorbent2008

    • Author(s)
      Takuya, Arase, Takehiko, Gotoh, Shuji, Sakohara
    • Organizer
      73rd Annual Meeting of SCEJ
    • Place of Presentation
      Shizuoka University
    • Year and Date
      2008-03-17
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Study of Adsorption/Desorption Rate of Endocrine Disrupters on Thermosensitive Gel2008

    • Author(s)
      Masato, Taira, Takehiko, Gotoh, Shuji, Sakohara
    • Organizer
      73rd Annual Meeting of SCEJ
    • Place of Presentation
      Shizuoka University
    • Year and Date
      2008-03-17
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 感温性ゲルの合成条件が内分泌攪乱化学物質の吸着挙動に及ぼす影響2007

    • Author(s)
      平良真人, 後藤健彦, 迫原修治
    • Organizer
      化学工学会山口大会
    • Place of Presentation
      山口大学
    • Year and Date
      2007-11-22
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
  • [Presentation] カチオン性感温性ゲルによるリン酸の吸脱着機構の検討2007

    • Author(s)
      荒瀬卓也, 後藤健彦, 迫原修治
    • Organizer
      化学工学会第39回秋季大会
    • Place of Presentation
      北海道大学
    • Year and Date
      2007-09-13
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
  • [Presentation] 感温性多孔質ゲルによる内分泌攪乱化学物質の吸脱着分離特性の検討2007

    • Author(s)
      平良真人, 後藤健彦, 迫原修治
    • Organizer
      化学工学会第39回秋季大会
    • Place of Presentation
      北海道大学
    • Year and Date
      2007-09-13
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Annual Research Report 2007 Final Research Report Summary
  • [Presentation] Study of Adsorption/Desorption Mechanism of Phosphoric Acid on Cationic Thermosensitive Gel2007

    • Author(s)
      Takuya, Arase, Takehiko, Gotoh, Shuji, Sakohara
    • Organizer
      39th Autumn Meeting of SCEJ
    • Place of Presentation
      Hokkaido University
    • Year and Date
      2007-09-13
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Adsorption/Desorption Properties of Endocrine Disrupters on Porous Thermosensitive Gel2007

    • Author(s)
      Masato, Taira, Takehiko, Gotoh, Shuji, Sakohara
    • Organizer
      39th Autumn Meeting of SCEJ
    • Place of Presentation
      Hokkaido University
    • Year and Date
      2007-09-13
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 感温性多孔質NIPAmゲルによるビスフェノールAの吸脱着特性2007

    • Author(s)
      後藤健彦, 平良真人, 迫原修治
    • Organizer
      化学工学会第72年会
    • Place of Presentation
      京都大学
    • Year and Date
      2007-03-19
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] pH-温度応答性多孔質ゲルによるリン酸の吸脱着特性2007

    • Author(s)
      荒瀬卓也, 後藤健彦, 迫原修治
    • Organizer
      化学工学会第72年会
    • Place of Presentation
      京都大学
    • Year and Date
      2007-03-19
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Adsorption/Desorption Properties of Bisphenol A on Porous Thermosensitive NIPAm Gel2007

    • Author(s)
      Takehiko, Gotoh, Masato, Taira, Shuji, Sakohara
    • Organizer
      72nd Annual Meeting of SCEJ
    • Place of Presentation
      Kyoto University
    • Year and Date
      2007-03-19
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Adsorption/Desorption Properties of Phosphoric Acid on pH-Thermosensitive Porous Gel2007

    • Author(s)
      Takuya, Arase, Takehiko, Gotoh, Shuji, Sakohara
    • Organizer
      72nd Annual Meeting of SCEJ
    • Place of Presentation
      Kyoto University
    • Year and Date
      2007-03-19
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] pH-温度応答性多孔質ゲル吸着剤のリン酸吸脱着特性2006

    • Author(s)
      荒瀬卓也, 後藤健彦, 迫原修治
    • Organizer
      化学工学会第38回秋季大会
    • Place of Presentation
      福岡大学
    • Year and Date
      2006-09-16
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Adsorption/Desorption Properties of Phosphoric Acid on Thermosensitive Gel Adsorbent2006

    • Author(s)
      Takuya, Arase, Takehiko, Gotoh, Shuji, Sakohara
    • Organizer
      38th Autumn Meeting of SCEJ
    • Place of Presentation
      Fukuoka University
    • Year and Date
      2006-09-16
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Adsorption/Desorption of Phosphoric Acid on Novel Thermosensitive Gel Adsorbent2006

    • Author(s)
      Takuya Arase, Takehiko Gotoh, Shuji Sakohara
    • Organizer
      Polymer Networks Group Conference 2006
    • Place of Presentation
      The Univ. Sheffield, UK
    • Year and Date
      2006-09-05
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Adsorption of Phosphoric Acid on Novel Thermosensitive Gel Adsorbent2006

    • Author(s)
      Takehiko, Gotoh, Takuya, Arase, Shuji, Sakohara
    • Organizer
      Polymer Networks Group Conference 2006
    • Place of Presentation
      The Univ. Sheffield
    • Year and Date
      2006-09-05
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Adsorption/Desorption Properties of Hydrophobic Molecules on Porous Thermosensitive Gel2006

    • Author(s)
      Takehiko Gotoh, Yasunao Seo, Shuji Sakohara
    • Organizer
      Polymer Networks Group Conference 2006
    • Place of Presentation
      The Univ. Sheffield, UK
    • Year and Date
      2006-09-04
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] Adsorption/Desorption Properties of Hydrophobic Molecules on Porous Thermosensitive Gel2006

    • Author(s)
      Takehiko, Gotoh, Yasunao, Seo, Shuji, Sakohara
    • Organizer
      Polymer Networks Group Conference 2006
    • Place of Presentation
      The Univ. Sheffield
    • Year and Date
      2006-09-04
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary

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Published: 2006-04-01   Modified: 2016-04-21  

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