Applications of Dissimilatory Iron Reducing Bacteria (DIRB) for recovery of Ni and Co from low-grade lateritic nickel ore

2020 ◽  
Vol 30 ◽  
pp. 351-354
Author(s):  
Jacintha Esther ◽  
Archana Pattanaik ◽  
N. Pradhan ◽  
L.B. Sukla
Keyword(s):  
Low Grade ◽  
Iron Reducing Bacteria ◽  
Lateritic Nickel ◽  
Reducing Bacteria

Reductive Dissolution of Iron Oxides and Manganese Bioleaching by Acidiphilium cryptum JF-5

2015 ◽  
Vol 1130 ◽  
pp. 347-350 ◽  
Author(s):  
Ernesto González ◽  
F. González ◽  
J.A. Muñoz ◽  
M. Luisa Blázquez ◽  
Antonio Ballester
Keyword(s):  
Iron Oxides ◽  
Reductive Dissolution ◽  
Low Grade ◽  
Manganese Ore ◽  
Iron Reducing Bacteria ◽  
Acidiphilium Cryptum ◽  
The Media ◽  
Acidic Environments ◽  
Reducing Bacteria ◽  
Positive Effect

In the development of new processes to use the potential of iron reducing bacteria,Acidiphilium cryptum, the main bacteria involved in the reduction of Fe (III) compounds in acidic environments, could play an important biohydrometallurgical role. Thus, the bioleaching of hematite, goethite and a low-grade manganese ore was assayed, in vials and columns, using three different media; two of which included a ligand, oxalate, or a redox mediator, thionine.Although the presence ofA. cryptumwas essential for promoting the dissolution of both iron oxides and the bioleaching of manganese ore, the addition of oxalate to the media tripled and quadrupled the microbial dissolution of hematite and goethite, respectively. Oxalate also had a positive effect in assays performed in columns, however, the addition of thionine to the medium allowed to reach significant hematite dissolution.

Solubilization of Plutonium Hydrous Oxide by Iron-Reducing Bacteria

1994 ◽  
Vol 28 (9) ◽  
pp. 1686-1690 ◽  
Author(s):  
Patricia A. Rusin ◽  
Leticia. Quintana ◽  
James R. Brainard ◽  
Betty A. Strietelmeier ◽  
C. Drew. Tait ◽  
...  
Keyword(s):  
Hydrous Oxide ◽  
Iron Reducing Bacteria ◽  
Reducing Bacteria

Physiochemical, mineralogical, and isotopic characterization of magnetite-rich iron oxides formed by thermophilic iron-reducing bacteria

1997 ◽  
Vol 61 (21) ◽  
pp. 4621-4632 ◽  
Author(s):  
Chuanlun Zhang ◽  
Shi Liu ◽  
Tommy J. Phelps ◽  
Dave R. Cole ◽  
Juske Horita ◽  
...  
Keyword(s):  
Iron Oxides ◽  
Iron Reducing Bacteria ◽  
Isotopic Characterization ◽  
Reducing Bacteria

scholarly journals Abundance of Fe(III) during cultivation affects the microbiologically influenced corrosion (MIC) behaviour of iron reducing bacteria Shewanella putrefaciens

2020 ◽  
Vol 174 ◽  
pp. 108855
Author(s):  
Nina Wurzler ◽  
Jan David Schutter ◽  
Ralph Wagner ◽  
Matthias Dimper ◽  
Dirk Lützenkirchen-Hecht ◽  
...  
Keyword(s):  
Shewanella Putrefaciens ◽  
Microbiologically Influenced Corrosion ◽  
Iron Reducing Bacteria ◽  
Reducing Bacteria

Hydroxyl radical formation from bacteria-assisted Fenton chemistry at neutral pH under environmentally relevant conditions

2016 ◽  
Vol 13 (4) ◽  
pp. 757 ◽  
Author(s):  
Jarod N. Grossman ◽  
Tara F. Kahan
Keyword(s):  
Hydrogen Peroxide ◽  
Hydroxyl Radical ◽  
Natural Waters ◽  
Shewanella Oneidensis ◽  
Radical Formation ◽  
Production Rates ◽  
Fenton Chemistry ◽  
Iron Reducing Bacteria ◽  
Neutral Ph ◽  
Reducing Bacteria

Environmental contextReactions in natural waters such as lakes and streams are thought to be extremely slow in the absence of sunlight (e.g. at night). We demonstrate that in the presence of iron, hydrogen peroxide and certain bacteria (all of which are common in natural waters), certain reactions may occur surprisingly quickly. These findings will help us predict the fate of many compounds, including pollutants, in natural waters at night. AbstractDark Fenton chemistry is an important source of hydroxyl radicals (OH•) in natural waters in the absence of sunlight. Hydroxyl radical production by this process is very slow in many bodies of water, owing to slow reduction and low solubility of FeIII at neutral and near-neutral pH. We have investigated the effects of the iron-reducing bacteria Shewanella oneidensis (SO) on OH• production rates from Fenton chemistry at environmentally relevant hydrogen peroxide (H2O2) and iron concentrations at neutral pH. In the presence of 2.0 × 10–4M H2O2, OH• production rates increased from 1.3 × 10–10 to 2.0 × 10–10Ms–1 in the presence of 7.0 × 106cellsmL–1 SO when iron (at a concentration of 100μM) was in the form of FeII, and from 3.6 × 10–11 to 2.2 × 10–10Ms–1 when iron was in the form of FeIII. This represents rate increases of factors of 1.5 and 6 respectively. We measured OH• production rates at a range of H2O2 concentrations and SO cell densities. Production rates depended linearly on both variables. We also demonstrate that bacteria-assisted Fenton chemistry can result in rapid degradation of aromatic pollutants such as anthracene. Our results suggest that iron-reducing bacteria such as SO may be important contributors to radical formation in dark natural waters.

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