Nanochemistry and biotechnology

Nanostructural and biocolloid transformations of bottom sea sediments and physicochemical methods of their separation 
Panko A.V.1, Kovzun I.G.1, Prokopenko V.A.1, Nikipelova O.M.2, 
Tsyganovich O.A..1
1 F.D. Ovcharenko Institute of Biocolloidal Chemistry of NAS of Ukraine, 
42, Ak.Vernadskogo Blvd., Kyiv, Ukraine,03142. E-mail: gr.k.ibcc@ukr.net
2 Engineering and Technology Institute "Biotechnika" of NAAS of Ukraine, 
26, Maiakska St, Khlibodarske, Odes'ka oblast, 67667

According to the experimental, and theoretical data obtained for the composing generalized physical, biocolloid-chemical, and microbiological models of transformation of marine sediment iron-aluminosilicates under the action of natural synergically correlating factors, the possibility of separating their components in different methods has been established, and that is generally confirmed by literature data [1, 2]. Improving such methods was done using previously developed [1] and partially generalized ideas about biocolloidal mechanisms of various silicates and metal oxides release from sediments. Thus, according to the obtained data, the separation of various oxides, such as iron and manganese, from iron-aluminosilicate precipitates is possible due to bacterial processes, which are further accompanied by chemical and physicochemical nanostructural transformations. Confirmation of such transformations is demonstrated by the example of synergically correlating parameters of viscosity, iron and manganese ion concentration, and microorganism count (CFU) for different iron-aluminosilicate model systems, as well as by changes in the microorganism count in biocenoses of natural dispersed iron-aluminosilicate compositions. Features of physicochemical methods of separation of biocolloidally treated sea and lake sediments are considered, which will allow obtaining of iron and iron-polymetallic concentrates based on Fe-Mn compositions without harmful impurities Si, S, P, and As.

1.	Kovzun I. G., Prokopenko V. A., Panko A. V., et al. Nanochemical, Nanostructural and Biocolloidal Aspects of Transformations in Dispersions of Iron-Aluminosilicate Minerals.- Kyiv: PH “Akademperiodyka”.- 2020.- 187 p. https://doi.org/10.15407/akademperiodyka.416.188
2.	Nasibullin B.A., Gushcha S.G., Nikipelova O.M., Nikolenko S.I., et al. Pathophysiological mechanisms of biological activity of colored clays (in Ukrainian). – Kharkiv, 2007. – 126 p. – ISBN 978-966-400-418-0