Surfactant sorption on a single air bubble in an ultrasonic standing acoustic wave field
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
Ultrasound application presents a promising non-intrusive way to enhance and facilitate mass transfer in aqueous systems. This enhanced mass transfer can influence the sorption processes in multiphase flows. Previous studies investigating the impact of ultrasound on sorption, have reported an increase in either desorption due to the rise in liquid temperature or adsorption due to the additional convective mass transfer resulting from acoustic streaming. In this study, low intensity ultrasound with a frequency of 36 kHz was deployed to evaluate the sorption process of Triton X-100 on the surface of a single bubble, placed along the standing acoustic wave using profile analysis tensiometry. Furthermore, microscopic particle image velocimetry was used to understand the role acoustic streaming might play during different stages of the sorption process. Contrary to expectations, the results showed no considerable change in surface tension and sorption dynamics after sonicating both fresh and surfactant-loaded bubbles. The results of this study suggest that the observations from previous studies may be attributed to the additional energy input of the acoustic wave into the system rather than the presence of an external acoustic field.
Details
Original language | English |
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Article number | 131210 |
Number of pages | 11 |
Journal | Colloids and Surfaces A: Physicochemical and Engineering Aspects |
Volume | 665 |
Early online date | Mar 2023 |
Publication status | Published - 20 May 2023 |
Peer-reviewed | Yes |
External IDs
Scopus | 85150050439 |
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ORCID | /0000-0002-2493-7629/work/168207382 |
ORCID | /0000-0003-1594-1244/work/172573287 |
Keywords
Keywords
- Sonication, Sorption on bubble, Standing acoustic wave, Surface tension, Tensiometry, Ultrasound