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Isotope Microscopy Visualization of Adsorption Profile Verifies the Mechanism of Higher Adsorption Capacity on Super-fine Powdered Activated Carbon

Research Project

Project/Area Number 25550049
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Environmental engineering and reduction of environmental burden
Research InstitutionHokkaido University

Principal Investigator

MATSUI Yoshihiko  北海道大学, 工学(系)研究科(研究院), 教授 (00173790)

Co-Investigator(Kenkyū-buntansha) MATSUSHITA Taku  北海道大学, 大学院工学研究院, 准教授 (30283401)
Project Period (FY) 2013-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords用排水システム / 環境技術 / 環境材料 / 土木環境システム / 反応・分離工学 / 水資源
Outline of Final Research Achievements

Decreasing the particle size of powdered activated carbon may enhance its equilibrium adsorption capacity for some compounds, such as geosmin, 2-methylisoborneol, and polystyrene sulfonates. Shell adsorption model (SAM), in which adsorbates preferentially adsorb near the exterior surface of the adsorbent particle, may explain this enhancement. This study used isotope microscopy and deuterium-labeled adsorbates to directly visualize the solid-phase concentration profiles of these compounds in carbon particles. The deuterium/hydrogen ratio, which was used as an index of the solid-phase concentration of the adsorbates, was higher in the shell region than in the inner region of carbon particles. Solid-phase concentrations obtained from the deuterium/hydrogen ratio roughly agreed with those predicted by SAM analyses of isotherm data. The direct visualization of the localization of compounds in carbon particles explained the mechanism of the equilibrium adsorption capacity enhancement.

Report

(3 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • Research Products

    (4 results)

All 2015 2014 2013

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (3 results)

  • [Journal Article] Isotope microscopy visualization of the adsorption profile of 2-methylisoborneol and geosmin in powdered activated carbon2014

    • Author(s)
      Matsui, Y., Sakamoto, A., Nakao, S., Taniguchi, T., Matsushita, T., Shirasaki, N., Sakamoto, N. and Yurimoto, H.
    • Journal Title

      Environmental Science & Technology

      Volume: 48 Issue: 18 Pages: 10897-10903

    • DOI

      10.1021/es5024515

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Presentation] 2-メチルイソボルネオールとジェオスミンは活性炭のどこに吸着するのか:同位体顕微鏡を用いた直接観察2015

    • Author(s)
      坂本明日香, 松井佳彦, 中尾聡一, 谷口琢磨, 松下拓, 白崎伸隆
    • Organizer
      第49回日本水環境学会年会
    • Place of Presentation
      金沢
    • Year and Date
      2015-03-16 – 2015-03-18
    • Related Report
      2014 Annual Research Report
  • [Presentation] Where in an activated carbon particle MIB and geosmin adsorb: isotope micro-mapping2014

    • Author(s)
      Sakamoto, A., *Matsui, Y., Nakao, S., Taniguchi, T., Shirasaki, N. and Matsushita, T.
    • Organizer
      International Water Association World Water Congress
    • Place of Presentation
      Lisbon, Portugal
    • Year and Date
      2014-09-21 – 2014-09-26
    • Related Report
      2014 Annual Research Report
  • [Presentation] Enhanced removal of 2-MIB and geosmin by super-fine PAC: Evidence of shell adsorption.2013

    • Author(s)
      1.Matsui, Y., Nakao, S., Taniguchi, T., Sakamoto, A., Shirasaki, N. and Matsushita, T.
    • Organizer
      The Tenth IWA Symposium on Off-Flavours in the Aquatic Environment
    • Place of Presentation
      National Cheng Kung University, Tainan, Taiwan
    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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