Microbiological leaching of a chalcopyrite concentrate and the influence of hydrostatic pressure on the activity of Thiobacillus ferrooxidans

1979 ◽  
Vol 7 (1) ◽  
pp. 85-90 ◽  
Author(s):  
Klaus Bosecker ◽  
Arpad E. Torma ◽  
James A. Brierley
Keyword(s):  
Hydrostatic Pressure ◽  
Thiobacillus Ferrooxidans ◽  
Chalcopyrite Concentrate

scholarly journals Effects of Phospholipid on Bacterial Leaching of Chalcopyrite Concentrate by Thiobacillus ferrooxidans. Effects of phosphatidyglycerol.

1992 ◽  
Vol 108 (2) ◽  
pp. 129-133
Author(s):  
Naoki HIROYOSHI ◽  
Masami TSUNEKAWA ◽  
Tsuyoshi HIRAJIMA ◽  
Takakatsu TAKAMORI
Keyword(s):  
Thiobacillus Ferrooxidans ◽  
Bacterial Leaching ◽  
Chalcopyrite Concentrate

scholarly journals Leaching behavior and its mechanism in the leaching of a chalcopyrite concentrate by Thiobacillus ferrooxidans.

1990 ◽  
Vol 106 (4) ◽  
pp. 173-179
Author(s):  
Takakatsu TAKAMORI ◽  
Keiko SASAKI ◽  
Masami TSUNEKAWA ◽  
Tsuyoshi HIRAJIMA
Keyword(s):  
Thiobacillus Ferrooxidans ◽  
Leaching Behavior ◽  
Chalcopyrite Concentrate

Oxidation of gallium sulfides by Thiobacillus ferrooxidans

1978 ◽  
Vol 24 (7) ◽  
pp. 888-891 ◽  
Author(s):  
Arpad E. Torma
Keyword(s):  
Oxygen Uptake ◽  
Thiobacillus Ferrooxidans ◽  
Oxidation Process ◽  
Specific Rate ◽  
Bacterial Oxidation ◽  
Naturally Occurring ◽  
Bacterial Action ◽  
Chalcopyrite Concentrate

The bacterial oxidation of a naturally occurring gallium-bearing chalcopyrite concentrate and a pure synthetic gallium (III) sulfide has been investigated at pH 1.8 and 35 °C, using an active culture of Thiobacillus ferrooxidans. This oxidation process may proceed by direct or by indirect bacterial action. The highest dissolved gallium and copper concentrations were about 2.2 and 40.2 g/ℓ respectively. The order of the specific rate of oxygen uptake by T. ferrooxidans is approximately CuFeS2[Formula: see text] gallium-bearing CuFeS2 > FeS2 > CuS > Cu2S > Ga2S3.

Scanning Electron Microscope Study of Bacteria on Mineral Surfaces

1976 ◽  
Vol 34 ◽  
pp. 130-131
Author(s):  
V.K. Berry
Keyword(s):  
Oxidation Reaction ◽  
Electron Microscope Study ◽  
Elemental Sulfur ◽  
Thiobacillus Ferrooxidans ◽  
Physical Contact ◽  
Metal Sulfides ◽  
Low Grade ◽  
Mineral Surfaces ◽  
Mineral Surface ◽  
Scanning Electron Microscope Study

There are two strains of bacteria viz. Thiobacillus thiooxidansand Thiobacillus ferrooxidanswidely mentioned to play an important role in the leaching process of low-grade ores. Another strain used in this study is a thermophile and is designated Caldariella .These microorganisms are acidophilic chemosynthetic aerobic autotrophs and are capable of oxidizing many metal sulfides and elemental sulfur to sulfates and Fe2+ to Fe3+. The necessity of physical contact or attachment by bacteria to mineral surfaces during oxidation reaction has not been fairly established so far. Temple and Koehler reported that during oxidation of marcasite T. thiooxidanswere found concentrated on mineral surface. Schaeffer, et al. demonstrated that physical contact or attachment is essential for oxidation of sulfur.

The Hydrostatic Pressure Effect on Elastic Properties of B2-Phase Single Crystals Ti50Ni48Fe2and Ti50Ni45Fe5Alloys

1995 ◽  
Vol 05 (C8) ◽  
pp. C8-729-C8-734
Author(s):  
A.I. Lotkov ◽  
V.P. Lapshin ◽  
V.A. Goncharova ◽  
H.V Chernysheva ◽  
V.N. Grishkov ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Single Crystals ◽  
Elastic Properties ◽  
Pressure Effect ◽  
B2 Phase
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