Results 151 to 160 of about 1,142 (184)

The inhibitory effect of antimicrobial zeolite on the biofilm of Acidithiobacillus thiooxidans

Biodegradation, 2009
The inhibitory effect of antimicrobial zeolite coated concrete specimens (Z2) against Acidithiobacillus thiooxidans was studied by measuring biomass dry cell weight (DCW), biological sulphate generation, and oxygen uptake rates (OURs). Uncoated (UC), and blank zeolite coated without antimicrobial agent (ZC) concrete specimens were used as controls. The
Tesfaalem, Haile, George, Nakhla
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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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Solubilization of a K-silicate rock by Acidithiobacillus thiooxidans

Minerals Engineering, 2019
Abstract Sulfur-oxidizing bacteria are used in bioleaching processes to recover metals such as gold and copper. The mechanisms for solubilizing metals used by the bacterium Acidithiobacillus thiooxidans involve sulfur oxidation reactions, with the consequent formation of acid.
Patrícia Cardoso Matias, Edson Marcio Mattiello, Wedisson Oliveira Santos, Jorge Luis Badel, Víctor Hugo Alvarez V.   +4 more
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Bioleaching of metals from printed wire boards by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans and their mixture

Journal of Hazardous Materials, 2009
Bioleaching processes were used to mobilize metals from printed wire boards (PWBs). The bacteria Acidithiobacillus ferrooxidans (A. ferrooxidans) and Acidithiobacillus thiooxidans (A. thiooxidans) isolated from an acidic mine drainage were grown and acclimated in presence of PWBs and then used as bioleaching bacteria to solubilize metals from PWBs. The
Jingwei, Wang, Jianfeng, Bai, Jinqiu, Xu, Bo, Liang   +3 more
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Biomachining rates of various metals by Acidithiobacillus thiooxidans

International Journal of Surface Science and Engineering, 2012
The evaluation of a potential of a microorganism for the biomachining technology is conducted in the current study. As the fundamental step, the specific metal removal rates (SMRR) of copper, nickel and aluminium in use of different level of cell concentration of Acidithiobacillus thiooxidans (At.
Hong Hocheng, U.U. Jadhav, J.H. Chang
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Influence of the surface speciation on biofilm attachment to chalcopyrite by Acidithiobacillus thiooxidans

Applied Microbiology and Biotechnology, 2012
Surfaces of massive chalcopyrite (CuFeS2) electrodes were modified by applying variable oxidation potential pulses under growth media in order to induce the formation of different secondary phases (e.g., copper-rich polysulfides, S n(2-); elemental sulfur, S(0); and covellite, CuS).
René H, Lara, J Viridiana, García-Meza, Ignacio, González, Roel, Cruz   +3 more
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A comparison of bioleaching of covellite using pure cultures of Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans or a mixed culture of Leptospirillum ferrooxidans and Acidithiobacillus thiooxidans

Hydrometallurgy, 2003
The aim of this investigation was to determine the efficacy of covellite bioleaching using pure cultures of Acidithiobacillus ferrooxidans or Acidithiobacillus thiooxidans and a mixed culture composed of At. thiooxidans and Leptospirillum ferrooxidans. The experiments were carried out in shake flasks with or without iron(II) (1 g/L as ferrous sulphate)
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Bioleaching of chromium from tannery sludge by indigenous Acidithiobacillus thiooxidans

Journal of Hazardous Materials, 2007
Chromium in tannery sludge will cause serious environmental problems and is toxic to organisms. The acidophilic sulfur-oxidizing Acidithiobacillus thiooxidans can leach heavy metals form urban and industrial wastes. This study examined the ability of an indigenous sulfur-oxidizing A. thiooxidans to leach chromium from tannery sludge. The results showed
Yuan-Shan, Wang, Zhi-Yan, Pan, Jian-Min, Lang, Jian-Miao, Xu, Yu-Guo, Zheng   +4 more
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Changes in biofilm structure during the colonization of chalcopyrite by Acidithiobacillus thiooxidans

Applied Microbiology and Biotechnology, 2012
Biofilms of Acidithiobacillus thiooxidans were grown on the surface of massive chalcopyrite electrodes (MCE) where different secondary sulfur phases were previously formed by potentiostatic oxidation of MCE at 0.780≤Ean≤0.965 V (electrooxidized MCE, eMCE). The formation of mainly S⁰ and minor amounts of CuS and Sn²⁻ were detected on eMCEs.
J V, García-Meza, J J, Fernández, R H, Lara, I, González   +3 more
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Evolution of biofilms during the colonization process of pyrite by Acidithiobacillus thiooxidans

Applied Microbiology and Biotechnology, 2011
We have applied epifluorescence principles, atomic force microscopy, and Raman studies to the analysis of the colonization process of pyrite (FeS(2)) by sulfuroxidizing bacteria Acidithiobacillus thiooxidans after 1, 15, 24, and 72 h. For the stages examined, we present results comprising the evolution of biofilms, speciation of S (n) (2-) /S(0 ...
Dulce M, González, René H, Lara, Keila N, Alvarado, Donato, Valdez-Pérez, Hugo R, Navarro-Contreras, Roel, Cruz, Jessica Viridiana, García-Meza   +6 more
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