Oxidation of metal sulfides by Thiobacillus ferrooxidans grown on different substrates

1974 ◽  
Vol 20 (2) ◽  
pp. 141-147 ◽  
Author(s):  
Marvin Silver ◽  
Arpad E. Torma
Keyword(s):  
Lead Sulfide ◽  
Ferrous Sulfate ◽  
Nickel Sulfide ◽  
Thiobacillus Ferrooxidans ◽  
Cell Types ◽  
Metal Sulfides ◽  
Sulfide Ore ◽  
Sulfate Lead ◽  
Chalcopyrite Ore ◽  
Sulfide Concentrate

Thiobacillus ferrooxidans, grown on either ferrous sulfate, lead sulfide concentrate, or chalcopyrite concentrate demonstrated oxygen uptake and CO2 fixation in the presence of ferrous sulfate, chalcopyrite ore, pyrite ore, and red antimony trisulfide. Lead suifide-grown cells could oxidize lead sulfide ore and galena, using the energy obtained for CO2 fixation. All three cell types could oxidize nickel sulfide, but could not fix CO2 in the presence of this substrate. The solubilization of metals from the substrates and the crystallographic changes in the insoluble residues are reported.

A Low Temperature Precursor Sulfuration Route to Metal Sulfides Nanomaterials

2010 ◽  
Vol 148-149 ◽  
pp. 1404-1407
Author(s):  
Ya Hui Zhang ◽  
Xi Cheng ◽  
Qing Wang
Keyword(s):  
Low Temperature ◽  
Zinc Sulfide ◽  
Lead Sulfide ◽  
Nickel Sulfide ◽  
Cobalt Sulfide ◽  
Metal Sulfides

A low-temperature precursor sulfuration route has been established to prepare metal sulfides with different nanostructures during the synthesis of nickel sulfide. The advantages of the low-temperature precursor sulfuration route were testified by the synthesis of different metal sulfides ( lead sulfide, zinc sulfide and cobalt sulfide). It offers a novel path to the preparation of other metal sulfides.

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.

Leaching of a low-grade, copper–nickel sulfide ore

2009 ◽  
Vol 98 (1-2) ◽  
pp. 66-72 ◽  
Author(s):  
M. Maley ◽  
W. van Bronswijk ◽  
H.R. Watling
Keyword(s):  
Nickel Sulfide ◽  
Low Grade ◽  
Copper Nickel ◽  
Sulfide Ore

Nickel Sulfide Concentrate Processing Using Low-Temperature Roasting with Sodium Chloride

Metallurgist ◽  
2014 ◽  
Vol 58 (5-6) ◽  
pp. 353-359 ◽  
Author(s):  
V. A. Imideev ◽  
P. V. Aleksandrov ◽  
A. S. Medvedev ◽  
O. V. Bazhenova ◽  
A. R. Khanapieva
Keyword(s):  
Sodium Chloride ◽  
Low Temperature ◽  
Nickel Sulfide ◽  
Nickel Sulfide Concentrate ◽  
Sulfide Concentrate

Novel efficient heterogeneous visible light assisted Fenton-like catalyst (Ni,Mg,Cu)Fe2O4 from nickel sulfide concentrate

2019 ◽  
Vol 253 ◽  
pp. 1-4 ◽  
Author(s):  
Xing Han ◽  
Ting Chen ◽  
Yaxian Liu ◽  
Fangqin Cheng ◽  
Mei Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Nickel Sulfide ◽  
Nickel Sulfide Concentrate ◽  
Sulfide Concentrate

Investigation of Bioleaching of a Low Grade Nickel-Cobalt-Copper Sulfide Ore with High Magnesium as Olivine and Serpentine from Lao

2013 ◽  
Vol 825 ◽  
pp. 396-400 ◽  
Author(s):  
Bo Wei Chen ◽  
Liu Lu Cai ◽  
Biao Wu ◽  
Xue Liu ◽  
Jian Kang Wen
Keyword(s):  
Copper Sulfide ◽  
Nickel Sulfide ◽  
Low Grade ◽  
Nickel Cobalt ◽  
Nickel Silicate ◽  
Copper Leaching ◽  
Sulfide Ore ◽  
Initial Ph ◽  
Copper Sulfide Ore ◽  
Cobalt Copper

Shake flask bioleaching of a low-grade nickel-cobalt-copper sulfide ore from Lao was investigated to test the technical feasibility to recovery metals from this ore. The mineralogical results indicated that the valuable minerals were disseminated finely and the ore had a low content of sulfur and high content of iron and magnesium, which was very harmful for bioleaching. The effects of different parameters such as the amount of acid addition, inoculation volume, initial pH, temperature and leaching time on the bioleaching performance of the ore were evaluated after pre-leaching with dilute acid. The results showed that nickel, cobalt, copper leaching rates reached 81.61%, 80.75%, 70.97% at 33 °C and 83.40%, 82.13%, 70.34% at 45 °C. The mineralogical analysis of the leaching residues revealed that the leaching rate of nickel sulfide was more than 92% and the unleached nickel was mainly present as nickel silicate.

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