Emerging and Innovative Technologies

Oral

397071 - Stability of Nano Bubbles

Monday, June 4
10:30 AM - 12:00 PM
Location: Lakeshore C
Co-Authors: Janitha Hewa Batagoda, Newark, NJ, USA – New Jersey Institute of Technology; Jay Meegoda, Newark, NJ, USA – New Jersey Institute of Technology

Nano bubbles made of air, oxygen and ozone are used in wide range of applications from sports drinks to treatment of drinking water, groundwater and waste water to agriculture. Although nano bubbles have many industrial applications, there is limited information on its existence, long term-stability and eventual dissolution or disappearance. In this study, we propose that nano bubbles are formed and exist due negative surface charge. The zeta potential measurements confirm the validity of such hypothesis. With such charged surface in dipolar water electrical double layer is formed. Hence the electrical double layer theory was developed for charged nano bubbles and applied to explain the variation in bubble size as well as zeta potential for nano bubbles formed under different solution pH levels, temperatures, salt concentrations, as well as different gas types and methods of formation of nano bubbles. The zeta potential and bubble sizes were measured with time to examine the long term-stability and eventual dissolution or disappearance. Then the above information is used develop a theory to explain the long term-stability and eventual dissolution or disappearance of nano bubbles.

Shaini Dilsha. Aluthgun Hewage, M.Sc.

Doctoral Student
New Jersey Institute of Technology

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