NDLI: Thermoacidophilic microbial community oxidizing the gold-bearing flotation concentrate of a pyrite-arsenopyrite ore

Content Provider	Springer Nature Link
Author	Panyushkina, A. E. Tsaplina, I. A. Grigor’eva, N. V. Kondrat’eva, T. F.
Copyright Year	2014
Abstract	An aboriginal community of thermophilic acidophilic chemolithotrophic microorganisms (ACM) was isolated from a sample of pyrite gold-bearing flotation concentrate at 45–47°C and pH 1.8–2.0. Compared to an experimental thermoacidophilic microbial consortium formed in the course of cultivation in parallel bioreactors, it had lower rates of iron leaching and oxidation, while its rate of sulfur oxidation was higher. A new thermophilic acidophilic microbial community was obtained by mutual enrichment with the microorganisms from the experimental and aboriginal communities during the oxidation of sulfide ore flotation concentrate at 47°C. The dominant bacteria of this new ACM community were Acidithiobacillus caldus (the most active sulfur oxidize) and Sulfobacillus thermotolerans (active oxidizer of both iron and sulfur), while iron-oxidizing archaea of the family Ferroplasmaceae and heterotrophic bacteria Alicyclobacillus tolerans were the minor components. The new ACM community showed promise for leaching/oxidation of sulfides from flotation concentrate at high pulp density (S : L = 1 : 4).
Starting Page	539
Ending Page	549
Page Count	11
File Format	PDF
ISSN	00262617
Journal	Microbiology
Volume Number	83
Issue Number	5
e-ISSN	16083237
Language	English
Publisher	Pleiades Publishing
Publisher Date	2014-09-25
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	flotation concentrate of a gold-bearing sulfide ore thermoacidophilic microbial communities species composition of ACM communities Microbiology Medical Microbiology
Content Type	Text
Resource Type	Article
Subject	Microbiology Applied Microbiology and Biotechnology

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Leaching of pyrite-arsenopyrite concentrate in bioreactors during continuous cultivation of a thermoacidophilic microbial community

Optimization of bioleaching and oxidation of gold-bearing pyrite-arsnopyrite ore concentrate in batch mode

Biooxidation of a double-refractory gold-bearing sulfide ore concentrate

Two-stage process of bacterial-chemical oxidation of refractory pyrite-arsenopyrite gold-bearing concentrate

Effect of the aeration mode and yeast extract on the oxidation of high-pyrrhotite sulfide ore flotation concentrate and on the composition of the acidophilic chemolithotrophic microbial community

Specific characteristics of the strains isolated from a thermoacidophilic microbial community oxidizing antimony sulfide ore

Biooxidation of a gold-containing sulfide concentrate in relation to changes in physical and chemical conditions

Effect of temperature on the rate of oxidation of pyrrhotite-rich sulfide ore flotation concentrate and the structure of the acidophilic chemolithotrophic microbial community

Rates of sulfide mineral oxidation by acidophilic chemolithotrophic microbial communities from various sources

Thermoacidophilic microbial community oxidizing the gold-bearing flotation concentrate of a pyrite-arsenopyrite ore

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