Physico-Chemical nanomaterials science

Nanostructural biocolloid-chemical transformations of marine iron-aluminosilicate sediments and their influence on the formation of ore minerals
Panko A.V.1, Kovzun I.G.1, Prokopenko V.A.1,2, Tsyganovich O.A.1,2, Oliinyk V.O.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 NTUU «KPI», 37, Peremohy Ave., building 4, Kyiv, Ukraine, 03056

The influence of nanostructural-biocolloidal, nanochemical, and geomechanical transformations of disperse marine iron-aluminosilicate deposits (IASs) on their mineralogical transformations and influence on the ecology of marine basins is considered. The aim of such studies was to substantiate the mechanisms of complex abiotic and biotic transformations in multilayer sludge sediments while their movement by marine slopes, and the formation of new ore deposits from them at conditions of changing ecological equilibrium [1]. 
It is established, that the changes in the complex properties of IASs under the influence of processes involving biogeocenoses significantly affect the properties of marine and estuarine sediments. They change according to the laws of physicochemical geomechanics, and biocolloidal chemistry. The causes and mechanisms of dispersion, mineralogical transformation, and separation of bottom sediments in the conditions of natural disasters are clarified. It is established that such phenomena begin under the influence of biocolloidal processes and gravity. It is shown that under the action of gravitational loading, the elastoplastic IASs’ dispersions initially starts a laminar (0.1-0.5 km/h), then fast (20-40 km/h), and then a catastrophic (50-100 km/h) flow of suspensions, which leads to their stratification. Such phenomena are controlled by biocolloidal processes initiated by bacterial, and chemical reactions that accelerate the dispersion and mineralogical transformation of oozes with the formation of ore deposits. In general, these studies were conducted to clarify the overall dependences of the IASs’ transformation processes from their properties, which were not sufficiently studied before.

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