Abstract
The article describes the characteristics of micro-nano bubbles in the water for a long time, large specific surface area, high gas-liquid mass transfer efficiency, high interface potential and free radical generation. The generation of micro-nano bubbles is introduced, such as dissolved gas release method and dispersion. Air method, electrolysis method, etc. It mainly summarizes the research and application of micro-nano bubbles in surface water treatment, groundwater remediation, industrial wastewater treatment and enhanced ozone treatment, as well as practical applications in ship operation, metal surface degreasing and fruit and vegetable growth.
Highlights
Speaking, bubbles with a particle size between 10 and 50 μm are micro-bubbles, bubbles with a particle size of less than 200 nm are called nano-bubbles [1], and bubbles with a particle size between the two are called micro-nano bubbles
With the continuous development of technology, micro-nano bubbles have gradually been applied in other fields, and more and more people are paying attention
It can be seen from the S/V=3/r formula that the bubble volume is constant, and the specific surface area of the bubble is inversely proportional to its radius, that is, the small radius of the bubble makes the specific surface area larger
Summary
Bubbles with a particle size between 10 and 50 μm are micro-bubbles, bubbles with a particle size of less than 200 nm are called nano-bubbles [1], and bubbles with a particle size between the two are called micro-nano bubbles. With the continuous development of technology, micro-nano bubbles have gradually been applied in other fields, and more and more people are paying attention
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