Adsorption of Some Bacteria to Positively-Charged Carbon Fiber Electrode

DOI Web Site 2 Citations 29 References
  • KONDO Yasuhito
    Ecology and Energy Systems Development Center, SANYO Electric Co., Ltd.
  • KURIHARA Hideki
    Saitama Industrial Technology Center
  • YAMADA Atsushi
    Ecology and Energy Systems Development Center, SANYO Electric Co., Ltd.
  • TAKAOKA Daizo
    Ecology and Energy Systems Development Center, SANYO Electric Co., Ltd.
  • TAKIZAWA Kikuo
    Ecology and Energy Systems Development Center, SANYO Electric Co., Ltd.
  • YASUDA Masashi
    Ecology and Energy Systems Development Center, SANYO Electric Co., Ltd.

Bibliographic Information

Other Title
  • 陽分極炭素繊維電極への各種微生物の吸着
  • ヨウ ブンキョク タンソ センイ デンキョク エ ノ カクシュ ビセイブツ ノ キュウチャク

Search this article

Description

We developed an effective system to eliminate bacteria from modified tap water using a positively-charged carbon felt electrode. Particles with stronger negative charges are adsorbed more readily to a positively-charged carbon felt electrode. The zeta potential of bacteria suspended in modified tap water was measured by a microscopic electrophoresis method based on the electrophoretic mobility of bacteria particles. Bacteria electro-adsorption to the electrode was examined by bioassay. The mean zeta potential of the bacteria, Escherichia coli was −12mV, Staphylococcus aureus was −13mV, Bacillus subtilius spore was −20mV, and Saccharomyces cerevisiae was −7mV. E. coli, S. aureus, and B. subtilius spore were reduced with electrolytic current on their zeta potential conditions. But S. cerevisiae was almost eliminated at zero mA in modified tap water in spite of the smallest magnitude of its zeta potential. These results were considered using DLVO theory. S. cerevisiae had the property of a soft particle the same as blood erythrocyte. Therefore it may be that S. cerevisiae was adsorbed on the carbon electrode not only by electrostatic trapping, but also by specific adsorption between cells and carbon fibers. B. subtilius spore had the property of colloidal particles which can be treated with the DLVO theory. E. coli and S. aureus were at an intermediate level between S. cerevisiae and B. subtilius. It may be that the positively-charged carbon felt electrode effectively adsorbed various bacteria in water.<br>

Journal

Citations (2)*help

See more

References(29)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top