Effect of heavy metals on the ferrous iron oxidizing ability of Thiobacillus ferrooxidans

1997 ◽  
Vol 44 (1-2) ◽  
pp. 53-63 ◽  
Author(s):  
G.C. De ◽  
D.J. Oliver ◽  
B.M. Pesic
Keyword(s):  
Heavy Metals ◽  
Ferrous Iron ◽  
Thiobacillus Ferrooxidans

Bioleaching of heavy metals from wastewater sludge by ferrous iron oxidizing bacteria

2016 ◽  
Vol 38 (1) ◽  
pp. 51-55 ◽  
Author(s):  
A. M. Marchenko ◽  
G. N. Pshinko ◽  
V. Ya. Demchenko ◽  
V. V. Goncharuk
Keyword(s):  
Heavy Metals ◽  
Ferrous Iron ◽  
Wastewater Sludge ◽  
Iron Oxidizing Bacteria

Growth of Thiobacillus ferrooxidans on various substrates

1969 ◽  
Vol 15 (1) ◽  
pp. 135-138 ◽  
Author(s):  
C. J. M. McGoran ◽  
D. W. Duncan ◽  
C. C. Walden
Keyword(s):  
Ferrous Iron ◽  
Generation Time ◽  
Bacterial Population ◽  
Thiobacillus Ferrooxidans ◽  
Growth Curves ◽  
Insoluble Material ◽  
Growth System ◽  
Ph Range

When Thiobacillus ferrooxidans was grown on ferrous iron and chalcopyrite (CuFeS2) in excess of 96% of the bacterial population was associated with the insoluble material. When sulfur was the substrate 77% of the bacteria were so associated. This necessitated consideration of the complete growth system to obtain accurate growth curves. By using total bacterial nitrogen as the measure of growth, it was shown that T. ferrooxidans had a minimum generation time of 6.5 to 10 hours on a ferrous iron substrate, 7 to 8 days on a sulfur substrate, and 14 to 17 hours on a chalcopyrite substrate. The pH range for growth was dependent on the substrate used.

Effects of the oxygen transfer rate on ferrous iron oxidation by Thiobacillus ferrooxidans

1998 ◽  
Vol 23 (7-8) ◽  
pp. 427-431 ◽  
Author(s):  
D.S Savić ◽  
V.B Veljković ◽  
M.L Lazić ◽  
M.M Vrvić ◽  
J.I Vučetić
Keyword(s):  
Oxygen Transfer ◽  
Ferrous Iron ◽  
Transfer Rate ◽  
Thiobacillus Ferrooxidans ◽  
Iron Oxidation ◽  
Oxygen Transfer Rate ◽  
Ferrous Iron Oxidation

Isolation and Characterization of Actinomycetes from Acidic Cultures of Ores and Concentrates

2013 ◽  
Vol 825 ◽  
pp. 406-409
Author(s):  
Akemi Matsubara ◽  
Jasmin E. Hurtado
Keyword(s):  
Heavy Metals ◽  
Sodium Chloride ◽  
Environmental Pollution ◽  
Ferrous Iron ◽  
Iron Oxidation ◽  
Mining Industry ◽  
Thiosulfate Oxidation ◽  
Ph Tolerance ◽  
Isolation And Characterization

Mining industry is a source of wealth but also of environmental pollution in Peru. In this study 12 colonies of actinomycetes were isolated in acidic cultures from mineral ores and concentrates from mines of the Peruvian highlands. The isolates were characterized phenotypically by microscopy and growth at different conditions as pH tolerance, temperature, and sodium chloride, heavy metals resistance; ferrous iron and thiosulfate oxidation. All isolates were identified as actinomycetes based on their cultural and spore characteristics. Most of the isolates were able to grow at 8 - 45°C and pH 4 - 11. 60% of isolates grew at 10% NaCl but none of them growth at 13%. Iron oxidation was shown by 60% of isolates at pH 4, but only 25% were able to oxidize iron at pH 2. Thiosulfate oxidation was not detected in any isolate. Most of the isolates showed capacity to grow in medium with 200 ppm of Pb, Fe, Zn and 100 ppm of Cu. All of the physiological characteristics found in this work indicate the potential of these isolates as source for bioremediation and bioleaching.

scholarly journals Oxidation of Ferrous Iron and Elemental Sulfur by Thiobacillus ferrooxidans

1988 ◽  
Vol 54 (7) ◽  
pp. 1694-1699 ◽  
Author(s):  
Romilio T. Espejo ◽  
Blanca Escobar ◽  
Eugenia Jedlicki ◽  
Paulina Uribe ◽  
Ricardo Badilla-Ohlbaum
Keyword(s):  
Ferrous Iron ◽  
Elemental Sulfur ◽  
Thiobacillus Ferrooxidans

scholarly journals Chemical and Biological Leaching Methods to Remove Heavy Metals from Sewage Sludge: A Review

2008 ◽  
Vol 4 (3) ◽  
pp. 509-517
Author(s):  
Lugard N. Ukiwe ◽  
Allinor J.I ◽  
Ejele A.E ◽  
Anyadiegwu C.I.C ◽  
Ibeneme S.I
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Thiobacillus Ferrooxidans ◽  
Extraction Procedure ◽  
Metal Extraction ◽  
High Yield ◽  
Chemical Leaching ◽  
Solids Concentration ◽  
Acid Consumption ◽  
Removal Of Heavy Metals

The removal of heavy metals (HMs) in sewage sludge (SS) is important since sludge is often disposed or applied on farmland to enhance soil fertility. The present study reviewed two conceptual approaches (chemical and biological leaching) of removing HMs present in SS. In the chemical leaching method, traditional acid treatment together with novel methods such as aeration, complexation and sequential extraction procedure have been reviewed extensively. Certain factors influence the removal of HMs in SS. These factors include; pH, leaching agent, redox potential, and contact time. Nitric acid (HNO3), hydrochloric acid (HCl), sulphuric acid (H2SO4), phosphoric acid (H3PO4), ethylenediamine tetraacetic acid (EDTA), as well as Thiobacillus thiooxidans and Thiobacillus ferrooxidans are the most widely studied leaching agents and substrates involved in the chemical and bioleaching processes. However, the bioleaching process has been proposed as a safe, efficient, economical, environmental friendly method to remove HMs in SS due to its simplicity, high yield of metal extraction, low acid consumption, and low sludge solids concentration. Nevertheless, the present review has noted that most researchers are of the opinion that more studies are needed in the bioleaching method in order to enhance its commercial attraction.  

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