Production of ferrous ions as intermediates during aerobic sulfur oxidation in Thiobacillus ferrooxidans.

1986 ◽  
Vol 50 (11) ◽  
pp. 2755-2761 ◽  
Author(s):  
Tsuyoshi SUGIO ◽  
Wataru MIZUNASHI ◽  
Tatsuo TANO ◽  
Kazutami IMAI
Keyword(s):  
Thiobacillus Ferrooxidans ◽  
Sulfur Oxidation ◽  
Ferrous Ions

scholarly journals Role of a Ferric Ion-Reducing System in Sulfur Oxidation of Thiobacillus ferrooxidans

1985 ◽  
Vol 49 (6) ◽  
pp. 1401-1406 ◽  
Author(s):  
Tsuyoshi Sugio ◽  
Chitoshi Domatsu ◽  
Osamu Munakata ◽  
Tatsuo Tano ◽  
Kazutami Imai
Keyword(s):  
Thiobacillus Ferrooxidans ◽  
Sulfur Oxidation ◽  
Ferric Ion

OXIDATION OF INORGANIC SULFUR COMPOUNDS BY WASHED CELL SUSPENSIONS OF THIOBACILLUS FERROOXIDANS

1966 ◽  
Vol 12 (5) ◽  
pp. 957-964 ◽  
Author(s):  
J. Landesman ◽  
D. W. Duncan ◽  
C. C. Walden
Keyword(s):  
Organic Compounds ◽  
Elemental Sulfur ◽  
Thiobacillus Ferrooxidans ◽  
Sulfur Oxidation ◽  
Sulfur Compounds ◽  
Maximum Temperature ◽  
Washed Cell ◽  
Inorganic Sulfur ◽  
Respiration Rates ◽  
Growth Adaptation

Oxidation of various inorganic sulfur compounds by Thiobacillus ferrooxidans was studied, and conditions necessary for maximum respiration rates were established. Optimum oxidation of elemental sulfur occurred at pH 5.0 and gave a Qo2(N) of 726; oxidation of thiosulfate gave a maximum Qo2(N) of 514 at pH 4.0; tetra- and tri-thionate, when oxidized at pH 6.0, gave a maximum Qo2(N) of 103 and 113, respectively. Polythionates accumulated during thiosulfate oxidation, but did not during oxidation of elemental sulfur. Metallic sulfide minerals were oxidized optimally as follows: chalcopyrite, pH 2.0, maximum Qo2(N) 3200; bornite, pH 3.0, maximum Qo2(N) 450; pyrite, pH 2.0, maximum Qo2(N) 1600. Maximum temperature for oxidation of all inorganic sulfur compounds tested was 40 C.The effect of a variety of organic compounds on sulfur oxidation is presented.T. ferrooxidans requires growth adaptation on iron for maximum respiration on that substrate; however, sulfur oxidation is not inducible. Iron and sulfur can be oxidized simultaneously, giving a rate equal to the sum of the maximum rates of oxidation of the two substrates individually.

Optimal conditions for bio-oxidation of ferrous ions to ferric ions using Thiobacillus ferrooxidans

2002 ◽  
Vol 85 (3) ◽  
pp. 225-234 ◽  
Author(s):  
S Malhotra ◽  
A.S Tankhiwale ◽  
A.S Rajvaidya ◽  
R.A Pandey
Keyword(s):  
Thiobacillus Ferrooxidans ◽  
Optimal Conditions ◽  
Ferric Ions ◽  
Ferrous Ions

scholarly journals Role of Ferrous Ions in Synthetic Cobaltous Sulfide Leaching of Thiobacillus ferrooxidans

1984 ◽  
Vol 48 (3) ◽  
pp. 461-467 ◽  
Author(s):  
Tsuyoshi Sugio ◽  
Chitoshi Domatsu ◽  
Tatsuo Tano ◽  
Kazutami Imai
Keyword(s):  
Thiobacillus Ferrooxidans ◽  
Ferrous Ions

Kinetics and energetics of reduced sulfur oxidation by chemostat cultures of Thiobacillus ferrooxidans

1986 ◽  
Vol 52 (6) ◽  
pp. 507-518 ◽  
Author(s):  
W. Hazeu ◽  
W. Bijleveld ◽  
J. T. C. Grotenhuis ◽  
E. Kakes ◽  
J. G. Kuenen
Keyword(s):  
Thiobacillus Ferrooxidans ◽  
Sulfur Oxidation ◽  
Chemostat Cultures ◽  
Reduced Sulfur

Leaching of Zinc Sulfide by Thiobacillus ferrooxidans: Bacterial Oxidation of the Sulfur Product Layer Increases the Rate of Zinc Sulfide Dissolution at High Concentrations of Ferrous Ions

1999 ◽  
Vol 65 (12) ◽  
pp. 5285-5292 ◽  
Author(s):  
T. A. Fowler ◽  
F. K. Crundwell
Keyword(s):  
Zinc Sulfide ◽  
Thiobacillus Ferrooxidans ◽  
Particle Surface ◽  
Product Layer ◽  
Ferrous Ions ◽  
Bacterial Oxidation ◽  
Rate Of Dissolution ◽  
Shrinking Core ◽  
Leaching Experiments ◽  
High Concentrations

ABSTRACT This paper reports the results of leaching experiments conducted with and without Thiobacillus ferrooxidans at the same conditions in solution. The extent of leaching of ZnS with bacteria is significantly higher than that without bacteria at high concentrations of ferrous ions. A porous layer of elemental sulfur is present on the surfaces of the chemically leached particles, while no sulfur is present on the surfaces of the bacterially leached particles. The analysis of the data using the shrinking-core model shows that the chemical leaching of ZnS is limited by the diffusion of ferrous ions through the sulfur product layer at high concentrations of ferrous ions. The analysis of the data shows that diffusion through the product layer does not limit the rate of dissolution when bacteria are present. This suggests that the action of T. ferrooxidans in oxidizing the sulfur formed on the particle surface is to remove the barrier to diffusion by ferrous ions.

Relationship between the ectomycorrhizal fungus Pisolithus tinctorius associated with loblolly pine and acid-generating Thiobacillus spp. on an acidic strip mine site

1985 ◽  
Vol 31 (9) ◽  
pp. 878-879 ◽  
Author(s):  
James W. Hendrix ◽  
Cathy Stevens Hunt ◽  
Dale M. Maronek
Keyword(s):  
Loblolly Pine ◽  
Thiobacillus Ferrooxidans ◽  
Bacterial Species ◽  
Ectomycorrhizal Fungus ◽  
Pisolithus Tinctorius ◽  
Ferrous Ions ◽  
Mine Site ◽  
Root Zones ◽  
Pine Seedlings ◽  
Strip Mine

Loblolly pine seedlings were transplanted onto a pyritic coal mine site in a commercial reclamation effort. After 5 years, trees which became naturally infected with Pisolithus tinctorius, or other ectomycorrhizal fungi which produced sporocarps, were twice the height and stem diameter of trees not associated with sporocarps. The hypothesis that P. tinctorius promotes superior growth of its host by inhibiting the growth or activity of Thiobacillus ferrooxidans and T. thiooxidans, which catalyze production of sulfuric acid from pyrite, was examined. Soil pH was lower in the root zones of trees associated with P. tinctorius than with trees not associated with P. tinctorius, and sulfate was higher. Differences were not found in ferric or ferrous ions or in populations of the two bacterial species. Apparently P. tinctorius benefits its hosts by mechanisms other than inhibition of Thiobacillus spp.

Inhibition of growth, iron, and sulfur oxidation in Thiobacillus ferrooxidans by simple organic compounds

1976 ◽  
Vol 22 (5) ◽  
pp. 719-730 ◽  
Author(s):  
Jon H. Tuttle ◽  
Patrick R. Dugan
Keyword(s):  
Organic Compounds ◽  
Ferrous Iron ◽  
Thiobacillus Ferrooxidans ◽  
Cell Envelope ◽  
Iron Oxidation ◽  
Inorganic Ions ◽  
Sulfur Oxidation ◽  
Physical Treatment ◽  
Inhibition Of Growth ◽  
Iron And Sulfur Oxidation

Iron and sulfur oxidation by Thiobacillus ferrooxidans as well as growth on ferrous iron were inhibited by a variety of low molecular weight organic compounds. The influences of chemical structure of the organic inhibitors, pH, temperature, physical treatment of cells, and added inhibitory or stimulatory inorganic ions and iron oxidation suggest that a major factor contributing to the inhibitory effects on iron oxidation is the relative electronegativity of the organic molecule. The data also suggest that inhibitory organic compounds may (i) directly affect the iron-oxidizing enzyme system, (ii) react abiologically with ferrous iron outside the cell, (iii) interfere with the roles of phosphate and sulfate in iron oxidation, and (iv) nonselectively disrupt the cell envelope or membrane.

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