Results 171 to 180 of about 3,299 (207)

Organoarsenic resistance and bioremoval of Acidithiobacillus ferrooxidans

Bioresource Technology, 2010
The tolerance and bioremoval of dimethylarsinic acid (DMA(V)) by Acidithiobacillus ferrooxidans (A. ferrooxidans) were investigated here. The inhibitory concentration (IC) of DMA(V) was determined for A. ferrooxidans. The effects of various parameters such as pH, contact time, initial DMA(V) concentration, biosorbent dose and temperature were ...
Lei, Yan, Huanhuan, Yin, Shuang, Zhang, Jiangong, Duan, Yongquan, Li, Peng, Chen, Hongyu, Li   +6 more
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Adhesion to metal sulfide surfaces by cells of Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans and Leptospirillum ferrooxidans

Hydrometallurgy, 2006
Abstract Attachment of four strains of Acidithiobacillus ferrooxidans to pyrite, chalcopyrite, galena, sphalerite or quartz was found to be mineral-selective. The bacterial extracellular polymeric substances (EPS) are responsible for mediating this process. Attachment of cells of A.
Harneit, Kerstin, Goeksel, A., Kock, D., Klock, J.h, Gehrke, Tilman, Sand, Wolfgang   +5 more
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Bioleaching of chalcopyrite by Acidithiobacillus ferrooxidans

Minerals Engineering, 2013
Acidithiobacillus ferrooxidans (A. ferrooxidans) was selected to experimentally study the effects of bacteria on the oxidation of chalcopyrite. The results indicated that A. ferrooxidans remarkably promoted the oxi- dation of chalcopyrite. The pH of the cell broth medium was observed to increase and then decrease dur- ing the bioleaching experiment ...
XingQing Zhao, RuCheng Wang, XianCai Lu, JianJun Lu, ChengXiang Li, Juan Li   +5 more
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Reduction of uranium(VI) by Acidithiobacillus thiooxidans and Acidithiobacillus ferrooxidans

Hydrometallurgy, 2010
Interaction of Acidithiobacillus thiooxidans and Acidithiobacillus ferrooxidans with soluble uranium(VI) was studied. Acidithiobacillus thiooxidans aerobic cultures showed considerable decrement of uranium in solution when pH was set to 4 with KOH. This condition stabilized polythionates produced as a result of the oxidative sulphur metabolism and ...
R.M. Gargarello, D. Di Gregorio, H. Huck, J. Fernandez Niello, G. Curutchet   +4 more
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Surface properties of pyrite in the course of bioleaching by pure culture of Acidithiobacillus ferrooxidans and a mixed culture of Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans

Hydrometallurgy, 2011
Abstract Both Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans attached to pyrite rapidly, reaching the adsorption equilibrium in 20 – 25 min. Furthermore, the adsorption content of substrate-grown bacteria was larger than that of solution-grown ones.
Hui Liu, Guohua Gu, Yangbao Xu
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The pyrite iron cycle catalyzed by Acidithiobacillus ferrooxidans

Journal of Mathematical Biology, 2013
In this paper, we study a model of the biotic pyrite iron cycle catalyzed by bacteria Acidithiobacillus ferrooxidans, in mining activity sites waste dumps. Chemical reactions, reaction rates and the population growth model are mostly taken from the existing literature. Analysis of the corresponding dynamical system shows the existence of up to four non-
Dumett, Miguel A., Keener, James P.
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Iron and sulfur oxidation pathways of Acidithiobacillus ferrooxidans

World Journal of Microbiology and Biotechnology, 2019
Acidithiobacillus ferrooxidans is a gram-negative, autotrophic and rod-shaped bacterium. It can gain energy through the oxidation of Fe(II) and reduced inorganic sulfur compounds for bacterial growth when oxygen is sufficient. It can be used for bio-leaching and bio-oxidation and contributes to the geobiochemical circulation of metal elements and ...
Yue, Zhan, Mengran, Yang, Shuang, Zhang, Dan, Zhao, Jiangong, Duan, Weidong, Wang, Lei, Yan   +6 more
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Strain Polymorphism of the Plasmid Profiles in Acidithiobacillus ferrooxidans

Microbiology, 2002
Plasmid profiles were studied in 27 Acidithiobacillus ferrooxidans strains isolated from different geographic zones and substrates differing in the composition of the main sulfide minerals, and also in experimentally obtained strains with acquired enhanced resistance to the ions of heavy metals (Fe, Ni, Cu, Zn, As).
T F, Kondrat'eva, S N, Ageeva, L N, Muntian, T A, Pivovarova, G I, Karavaĭko   +4 more
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Biocompatibility evaluation of magnetosomes formed by Acidithiobacillus ferrooxidans

Materials Science and Engineering: C, 2012
Magnetite nanocrystal has been extensively used in biomedical field. Currently, an interesting alternative to synthetic magnetic Fe3O4 nanoparticles, called magnetosome, has been found in magnetotactic bacteria. It has been reported that Acidithiobacillus ferrooxidans (At. ferrooxidans) has a potential to synthesize magnetosome.
Lei, Yan, Xiaoxuan, Yue, Shuang, Zhang, Peng, Chen, Zhiliang, Xu, Yang, Li, Hongyu, Li   +6 more
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Weathering of Biotite inAcidithiobacillus ferrooxidansCultures

Geomicrobiology Journal, 2011
The purpose of this study was to assess the weathering of biotite under conditions simulating an active bioleaching environment. Finely ground biotite was contacted with Acidithiobacillus ferrooxidans culture solutions for up to 120 days. Biotite was altered under these conditions to interstratified structures comprised of mixed layers of biotite and ...
Tariq M. Bhatti, Jerry M. Bigham, Antti Vuorinen, Olli H. Tuovinen   +3 more
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