A.Azevedo, H.Oliveira, J.Rubio (Laboratório de Tecnologia Mineral e Ambiental (LTM), Departamento de Engenharia de Minas, PPGE3M, Universidade Federal do Rio Grande do Sul, Brazil) wrote in an article "Bulk nanobubbles in the mineral and environmental areas: Updating research and applications":
"These nanometric bubbles present interesting and peculiar properties such as high surface area per volume unit, high stability and longevity, surface charge in water and the ability to aggregate hydrophobic particles." More
I answered: "This is not entirely true.
Bubbles of any size have a surface charge in water and the ability to aggregate hydrophobic particles, but not only nanobubbles. Even on the surface of the water.
The effect of nanobubbles on flotation is not straightforward. In ordinary flotation, nanobubbles cannot meet particles, since they cannot overcome hydraulic flows and the energy barrier. During the flotation, they are formed nonselectively on all particles (on hydrophobic and hydrophilic particles).
PhD Natalia Petrovskaya
References
1. https://www.sciencedirect.com/science/article/pii/S0001868619301290
2. http://www.ikir.ru/en/Events/Conferences/2013-VI-international/thesesAndReports/downloads/F_106-110.pdf
3. http://cazl.ru/publicism-mnogokomponent-34-index.html
"These nanometric bubbles present interesting and peculiar properties such as high surface area per volume unit, high stability and longevity, surface charge in water and the ability to aggregate hydrophobic particles." More
I answered: "This is not entirely true.
Bubbles of any size have a surface charge in water and the ability to aggregate hydrophobic particles, but not only nanobubbles. Even on the surface of the water.
The effect of nanobubbles on flotation is not straightforward. In ordinary flotation, nanobubbles cannot meet particles, since they cannot overcome hydraulic flows and the energy barrier. During the flotation, they are formed nonselectively on all particles (on hydrophobic and hydrophilic particles).
PhD Natalia Petrovskaya
References
1. https://www.sciencedirect.com/science/article/pii/S0001868619301290
2. http://www.ikir.ru/en/Events/Conferences/2013-VI-international/thesesAndReports/downloads/F_106-110.pdf
3. http://cazl.ru/publicism-mnogokomponent-34-index.html
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