Results 141 to 150 of about 6,286 (170)

Magnetic properties of Acidithiobacillus ferrooxidans

Materials Science and Engineering: C, 2013
Understanding the magnetic properties of magnetotactic bacteria (MTBs) is of great interest in fields of life sciences, geosciences, biomineralization, biomagnetism, and planetary sciences. Acidithiobacillus ferrooxidans (At. ferrooxidans), obtaining energy through the oxidation of ferrous iron and various reduced inorganic sulfur compounds, can ...
Lei, Yan, Shuang, Zhang, Peng, Chen, Weidong, Wang, Yanjie, Wang, Hongyu, Li   +5 more
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Adhesion forces between cells of Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans or Leptospirillum ferrooxidans and chalcopyrite

Colloids and Surfaces B: Biointerfaces, 2012
The efficiency of copper leaching is improved by bacteria attached to chalcopyrite. Therefore, the study of the attachment mechanism to control leaching is important. The adhesion of three species of leaching microorganisms including Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans and Leptospirillum ferrooxidans to chalcopyrite was ...
Zhu, Jianyu, Li, Qian, Jiao, Weifeng, Jiang, Hao, Sand, Wolfgang, Xia, Jinlan, Liu, Xueduan, Qin, Wenqing, Qiu, Guanzhou, Hu, Yuehua, Chai, Liyuan   +10 more
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Reduction of vanadium(V) with Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans

Bioresource Technology, 2004
Biotechnological leaching has been proposed as a suitable method for extraction of vanadium from spent catalysts and oil ash. In the biological leaching process, the vanadium(V) can be reduced to vanadium(IV), which is a less toxic and more soluble form of the vanadium.
Katarina, Bredberg, Hans T, Karlsson, Olle, Holst   +2 more
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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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Bioleaching of djurleite using Acidithiobacillus ferrooxidans

Minerals Engineering, 2013
Abstract The bioleaching of djurleite using Acidithiobacillus ferrooxidans (LD-1) was investigated in this paper. Experiments were carried out in shake flasks at pH 2.0, 160 r/min and 30 °C. The leaching residues were analyzed using X-ray diffraction (XRD), Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS).
Kai-bin Fu, Hai Lin, Huang Cheng, Xiao-lan Mo, Ying-bo Dong   +4 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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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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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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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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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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