Calcite Solubilization by Bacteria: A Novel Method of Environment Pollution Control

Global warming due to the emission of carbon dioxide (CO2) gas, by the anthropogenic sources is a great threat to the environment. A part of this gas is absorbed by soil bacteria as well as aquatic bacteria and it is converted into insoluble calcium carbonate (CaCO3) or calcite. Increased calcite concentration in water and agricultural land creates many problems to the human. In this investigation, an attempt has been made to carry out some experiments to isolate some bacteria from cow dung, which have both calcite solubilization and urease activities. Isolated bacteria solubilize calcite due to the secretion of citric acid, oxalic acid and sanazine pigment. All bacterial isolates were identified by 16S rRNA gene sequencing and the phylogenetic relationship among them was also studied using MEGA 6 software.