Surface Modification of Rock-Forming Minerals of Diamond-Bearing Kimberlites under Interaction with Wastewater and Electrochemically Treated Water
V. A. CHANTURIA, M. V. RYAZANTSEVA, G. P. DVOICHENKOVA, V. G. MINENKO, E. V. KOPORULINA
Institute of Integrated Mineral Development, Kryukovskii tupik 4, Moscow, 111020 Russia
Keywords: Кальцит, оливин, серпентин, поверхность, рентгеновская фотоэлектронная спектроскопия, электрохимическая водоподготовка минерализованных водных систем, calcite, olivine, serpentine, surface, X-ray photoelectronic spectroscopy, electrochemical treatment of mineralized water
Abstract
The structural and chemical surface transformation of basic kimberlite-forming minerals (calcite, olivine, serpentine) under the contact with natural and waste mineralized water and products of electrochemical treatment of the water are studied using X-ray photoelectronic spectroscopy, scanning electron microscopy and X-ray spectral micro-analysis, and atomic force microscopy. It is found that contact of kimberlite extract and recycling water induces chemical modification of calcite surface, which consists in adsorption of hydrocarbon impurities, and chlorine- and silica-bearing compounds, majority of which are removed during interaction with the product of electrochemical treatment of recycling water. The change in the structural and chemical surface properties of rock-forming silicates, aside from adsorption-desorption of organic compound, is also connected with the distortion of nano-size layer structure after leaching of Mg, Fe and Si, and with the carbonatization of the surface.
|
