EXTRACTION OF RARE AND NONFERROUS METALS BY MICROBIAL COMMUNITIES OF THE ASH FROM BURNING PAVLOGRAD’S COAL

Abstract

The aim of the paper was to study the ability to leach rare and nonferrous metals from the ash from the combustion of Pavlograd coal in the Ladyzhynskaya power plant by microorganisms formed during storage of anthropogenic microbiota. It was found out by atomic absorption spectroscopy that the ash contained copper, zinc, lead, gallium, germanium, tin, vanadium, cobalt, aluminum in industrial concentrations. Studies on leaching of metals from the ash from the combustion of Pavlograd coal were conducted under the favorable growth of mesophilic heterotrophic microorganisms, mesophilic acidophilic chemolithotrophic bacteria and moderately thermophilic acidophilic chemolithotrophitic bacteria. During the study it was showed high activity of lixiviant community moderately thermophilic acidophilic chemolithotrophic bacteria inhabiting the ash of the Ladyzhynskaya TPP regarding germanium, gallium, cadmium and nickel. Almost completely germanium, gallium, cadmium and to 76.6% nickel extracted in solution in mesophilic conditions by the biochemical activity of community of chemolithotrophic bacteria regardless of the source of energy.

Keywords

• зола
• вугілля
• гетеротрофні мікроорганізми
• ацидофільні хемолітотрофні бактерії
• біовилуговування
• рідкісні і кольорові метали.