[Biomachining of metal copper by Thiobacillus ferrooxidans].
Thiobacillus ferrooxidans was employed in the biomachining process of metal copper(Cu0). The bacteria growth and the changes of Fe3+ concentration during machining processes have been studied. Biomachining and chemical machining have been compared. The results showed that the concentrations of bacteria and Fe3+ determine the speed of machining copper. The biomachining is more fast that chemical maching because bacteria are able to regenerate Fe3+ oxidizing copper. It was also found that the Cu2+ produced from the machining processes inhibit the growth of bacteria. Cu2+ has to be removed.
Li
Y
Y
Institute of Microbiology, Chinese Academy of Sciences, Beijing 100080.
Zhang
D
D
Wu
Y
Y
D003300:Copper / Q000378:metabolism*; D007501:Iron / Q000378:metabolism; D010084:Oxidation-Reduction; D013855:Thiobacillus / Q000378:metabolism*
D003300:Copper; D007501:Iron