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Effect of NaCl on the Lifetime of Micro- and Nanobubbles
This item is licensed under:Creative Commons Attribution 4.0 International
| Title: | Effect of NaCl on the Lifetime of Micro- and Nanobubbles |
| Authors: | Uchida, Tsutomu Browse this author →KAKEN DB | | Liu, Shu Browse this author | | Enari, Masatoshi Browse this author | | Oshita, Seiichi Browse this author | | Yamazaki, Kenji Browse this author | | Gohara, Kazutoshi Browse this author →KAKEN DB |
| Keywords: | microbubble | | nanobubble | | freeze-fracture replica | | transmission electron microscope | | zeta potential | | ionic shielding | | diffusive shielding |
| Issue Date: | 5-Feb-2016 |
| Publisher: | MDPI |
| Journal Title: | Nanomaterials |
| Volume: | 6 |
| Issue: | 2 |
| Start Page: | 31 |
| Publisher DOI: | 10.3390/nano6020031 |
| Abstract: | Micro- and nanobubbles (MNBs) are potentially useful for industrial applications such as the purification of wastewater and the promotion of physiological activities of living organisms. To develop such applications, we should understand their properties and behavior, such as their lifetime and their number density in solution. In the present study, we observed oxygen MNBs distributed in an electrolyte (NaCl) solution using a transmission electron microscope to analyze samples made with the freeze-fracture replica method. We found that MNBs in a 100 mM NaCl solution remain for at least 1 week, but at higher concentrations decay more quickly. To better understand their lifetimes, we compared measurements of the solution's dissolved oxygen concentration and the -potential of the MNBs. Our detailed observations of transmission electron microscopy (TEM) images allows us to conclude that low concentrations of NaCl stabilize MNBs due to the ion shielding effect. However, higher concentrations accelerate their disappearance by reducing the repulsive force between MNBs. |
| Rights: | http://creativecommons.org/licenses/by/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/61388 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 内田 努
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