An investigation of nanobubbles in aqueous solutions for various applications

The distinctive properties of nanobubbles (<200 nm in diameter) attributed their use in many engineering fields. This paper enumerates the simplest method for generation of nanobubbles in different aqueous solutions with their practical applications. Tap water, distilled water, slurry water and sea water with and without the presence of nanobubbles were tested for chemical oxygen demand, biochemical oxygen demand, total suspended solids, total dissolved solids, dissolved oxygen, nitrate, phosphate, chromium and sulphide level. Measurement of size of nanobubbles by atomic force microscopy, measurement of density, viscosity, laser beam width and time taken for heating and cooling of aqueous solutions with and without the presence of nanobubbles were also presented in this experimental investigation. In the presence of nanobubbles, the porous nature of the material increases drastically so the original properties of the material changes. While the density of the material changes, its fluidity and other properties were changed. The presence and absence of nanobubbles influence drastic changes in properties of the chosen samples and hence different samples were examined. The result we obtained was good agreement of the previous results especially density and temperature variation in nanobubbles water. Tested nanobubbles aqueous solutions were applied for aquaculture, germination of green pulses and washing of utensils and the results are highlighted.