Elucidating adsorption mechanism of super-fine powdered activated carbon by isotope-imaging

2012 Fiscal Year Final Research Report

• Project/Area Number: 23656323
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Civil and environmental engineering
• Research Institution: Hokkaido University
• Principal Investigator: MATSUI Yoshihiko 北海道大学, 大学院・工学研究院, 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): 2011 – 2012
• Keywords: 用排水システム

Research Abstract

Geosmin and 2-methylisoborneol (MIB) adsorption capacity dependency on activated carbon particle size was investigated for two carbons. By using the isotope microscope system and carbon particles loaded with deuterium-doped MIB and geosmin, isotopic maps for deuterium/hydrogen ratio as a maker of MIB and geosmin were obtained. For a carbon in which the adsorption capacity to adsorb MIB and geosmin increased with decreasing carbon particle size, deuterium/hydrogen ratio was high on the exterior region close to the particle outer-surface compared with inner region. The result indicated the higher MIB and geosmin adsorption capacities on super-fine powdered activated carbon than on normal-size powdered activated carbon is explained by the shell adsorption mechanism. When MIB and geosmin adsorbs in internal pores of activated carbon particles, adsorption competition between natural organic matter (NOM) and these compounds does not increase when NOM uptake increased due to carbon size reduction.

Research Products

• [Journal Article] Natural organic matter that penetrates or does not penetrate activated carbon and competes or does not compete with geosmin (2013)
  • Author(s): Matsui, Y., Nakao, S., Yoshida, T., Taniguchi, T. and Matsushita, T
  • Journal Title: Separation and Purification Technology Volume: 113 Pages: 75-82
  • Peer Reviewed
• [Presentation] Enhanced Removal of 2-MIB and Geosmin by Super-fi ne PAC: Evidence of Shell Adsorption (2011)
  • Author(s): Matsui, Y., Nakao, S., Taniguchi, T., Shirasaki, N.,and Matsushita, T
  • Organizer: 10th IWA Symposium on Off-Flavours in the Aquatic Environment
  • Place of Presentation: National Cheng Kung University, Tainan, Chinese Taiwan
  • Year and Date: 20111027-1101
• [Presentation] Comparison of 2-methylisoborneol adsorption capacities on super-powdered and powdered activated carbonInternational Water Association (2011)
  • Author(s): Matsui, Y., Taniguchi, T., Nakao, S., MatsushitaT. and Shirasaki, N
  • Organizer: 9th IWA Symposium on Off-Flavours in the Aquatic Environment
  • Place of Presentation: Robert Gordon University, Aberdeen, UK
  • Year and Date: 2011-08-12