Kravchenko O. Features of the nanoaquacitrates action of transition metals on the hydrobionts of different trophic levels

It is determined the research results that allow solving scientific and practical problems in the study of the influence and nanoaquacitrate safety assessment for the hydro ecosystems. A pronounced biological effect of the nanoaquacitrate of transition metals on the aquatic biota in the concentration of 0,025 mg/dm3 on the cellular and organism level has been established for the first time. It certainly carries a significant potential threat to the environment as a result of production intensification and large-scale application of nanotechnology in various fields and spheres of human activity on the Earth. It is defined that the nanoaquacitrate effect on the biotic components of hydroecosystems depends on the type of metal, substances concentration in the aqua environmental and duration of interaction with the biota elements. The sensitivity of hydrobionts to nanoaquacitrates is commensurable with the level of their species organization, the ecological role and trophic links with the other abiotic elements of cenosis. It has experimentally been determined that nanoaquacitrates relatively quickly yield to elimination in the result of plants and fish absorption, as well as precipitation, thus transmutating into insoluble, biologically less active substances. It is shown that under the working concentration using for the ponds sanation and cleaning nanoaquacitrates do not accumulate in fish, thus slowing down the growth and reproduction of spineless hydrobionts and plant- amphiphts that can be used to control pond hydro ecosystems. It is proved the copper citrate at a concentration of 0,025 mg /dm3 displays the most pronounced effect on hydatophyte, which opens the way to the practical use of it in order to limit the growth of Elodea in ponds and reservoirs of hydroelectric power plants. Firstly a high antibacterial activity of the silver nanoaquacitrate in the concentration of 0,010 mg/dm3 has been determined concerning to the pathogens of fish infectious diseases at the same time with the quick elimination, allowing carrying out anti-parasitic treatment of such substance directly into the waters. Thus, the established patterns of nanoaquacitrate influence on the hydrobionts and the criteria of their environmental safety have been developed. They lay the foundation for the practical implementation of these substances in anti-epizootic measures in aquaculture and agricultural production in general.