Surface interaction of microbubbles and applications of hydrogen-bubble method for cleaning and separation

Koji Matsuura, Takahiro Uchida, Satoshi Ogawa, Chao Guan, Shinichiro Yanase

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Microbubble (MB) technology is important for the separation and purification of micro/nanomaterials from waste water. The recovery of these materials from water is required to reduce the risk of cytotoxicity. To investigate surface interactions related to the separation of micro/nanoparticles in water, we attempted to float TiO2, SiC, multi-walled carbon nanotubes (MWCNTs), and carbon fiber (CF) using MBs generated by electrolysis. After MBs were generated for 5-10 min by applying a voltage between two electrodes, SiC, MWCNT, and CF were aggregated on the surface of the tap water in the container. However, hydrophilic TiO2 remained well dispersed in water and did not aggregate after the generation of MBs. These results demonstrated that hydrophobic micro/nanoparticles in water can be separated by floatation and aggregation on the surface of water using this MB-generating method. We also measured the and zeta;-potential of MB-containing water; the recorded potentials ranged from -12 mV to -19 mV. The pH of this MB-containing water was 5.6. Based on the measured and zeta;-potential, the electrostatic interaction between MBs and the floating particles would not contribute to adsorption of MB and these particles. Therefore, the hydrophobic interaction with MBs can be used for the purification and separation of hydrophobic micro/nanoparticles.

Original languageEnglish
Title of host publication2015 International Symposium on Micro-NanoMechatronics and Human Science, MHS 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781479966783
DOIs
Publication statusPublished - Mar 21 2016
EventInternational Symposium on Micro-NanoMechatronics and Human Science, MHS 2015 - Nagoya, Japan
Duration: Nov 23 2015Nov 25 2015

Other

OtherInternational Symposium on Micro-NanoMechatronics and Human Science, MHS 2015
CountryJapan
CityNagoya
Period11/23/1511/25/15

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ASJC Scopus subject areas

  • Biomedical Engineering
  • Electrical and Electronic Engineering
  • Biotechnology
  • Education

Cite this

Matsuura, K., Uchida, T., Ogawa, S., Guan, C., & Yanase, S. (2016). Surface interaction of microbubbles and applications of hydrogen-bubble method for cleaning and separation. In 2015 International Symposium on Micro-NanoMechatronics and Human Science, MHS 2015 [7438234] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MHS.2015.7438234