Leaching of copper ore of the Udokanskoe deposit at low temperatures by an association of acidophilic chemolithotrophic microorganisms |
| |
| Authors: | T F Kondrat’eva T A Pivovarova L N Krylova V S Melamud E V Adamov G I Karavaiko |
| |
| Institution: | 1.Winogradsky Institute of Microbiology Russian Academy of Sciences,Moscow,Russia;2.National University of Science and Technology “MISIS,”,Moscow,Russia |
| |
| Abstract: | Pure cultures of indigenous microorganisms Acidithiobacillus ferrooxidans strain TFUd, Leptospirillum ferrooxidans strain LUd, and Sulfobacillus thermotolerans strain SUd have been isolated from the oxidation zone of sulfide copper ore of the Udokanskoe deposit. Regimes of bacterial-chemical
leaching of ore have been studied over a temperature range from −10 to +20°C. Effects of pH, temperature, and the presence
of microorganisms on the extraction of copper have been shown. Bacterial leaching has been detected only at positive values
of temperature, and has been much more active at +20 than at +4°C. The process of leaching was more active when the ore contained
more hydrophilic and oxidized minerals. The possibility of copper ore leaching of the Udokanskoe deposit using sulfuric acid
with pH 0.4 at negative values of temperature and applying acidophilic chemolithotrophic microorganisms at positive values
of temperature and low pH values was shown. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
