In the era of nanotechnology in the 21st century nanomaterials are increasingly used in the daily life of man. Main products of daily use such as cosmetics, detergents, paints, varnishes and electronics have in their composition nanomaterials / nanoparticles. Following the fear of uncontrolled penetration and accumulation of nanomaterials in the environment. Laboratory of Nanostructures for Photonic and Nanomedicine carries out research the fate of the stability and solubility of zinc oxide nanoparticles in suspension of natural waters. The results show that nano zinc oxide and, cobalt doped zinc oxide is agglomerating after a few minutes of its insert into the natural water. Nanoparticles of zinc oxide is more soluble than micro zinc oxide , the main factor responsible for this situation is the particle size and surface area. There are significant differences in the solubility of Zn depending on the type of water.
Study of the fate of ZnO nanoparticles in natural waters indicate the ZnO particles transform into other types of nanomaterials and increase the its size by recrystallization.