Department Seminar of Lena Borski - Nanobubbles Transport in Porous Media: Effect of Solution and Media Properties

School of Mechanical Engineering Seminar
Wednesday 8.11.2023 at 14:00

ZOOM SEMINAR

Nanobubbles Transport in Porous Media:
Effect of Solution and Media Properties

Lina Borsky

M.Sc. student of Dr. Ines Zucker

School of Mechanical Engineering, Tel Aviv University, Tel Aviv, Israel

Nanobubbles have been increasingly used in various applications involving porous media such as groundwater remediation and irrigation. However, the fundamental scientific knowledge regarding the interactions between nanobubbles and the media is still limited. In this study, we investigated how changes in solution chemistry (pH, ionic strength, and valence) and media characteristics (size and wettability) affect size and concentration of nanobubble under dynamic conditions using column experiments. Quartz crystal microbalance with dissipation monitoring (QCM-D) provided a deeper understanding of nanobubbles’ interactions with solid phase. The irreversible formation of an elastic nanobubbles layer is observed on the solid surface, a phenomenon that increases with ionic strength. Our findings suggest that nanobubbles are less mobile in solutions of higher ionic strength and valence, lower pH and smaller porous media sizes, while wettability of porous media has negligible influence on retention of nanobubbles. Overall, our findings provide insights into the underlying mechanisms of nanobubble interactions and suggest potential strategies to optimize their performance in various applications.

https://tau-ac-il.zoom.us/j/86497933118