Effect of Acidithiobacillus ferrooxidans on Humic-Acid Passivation Layer on Pyrite Surface
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چکیده
منابع مشابه
Surface Thermodynamics and Extended DLVO Theory of Acidithiobacillus ferrooxidans Cells Adhesion on Pyrite and Chalcopyrite
The adhesion of Acidithiobacillus ferrooxidans bacterial cells have been assessed by following the thermodynamic and extended DLVO theoretical approaches. Surface potential, interfacial tension and contact angle parameters that are necessary for the calculation of free energy of adhesion have been determined experimentally. The Hamaker constant involved in the Lifshitz-van der Waals interaction...
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In vivo force microscopy measurements of Acidithiobacillus ferrooxidans revealed a repulsive force that was due to the presence of extracellular polymers on the bacterium's surface. Measured force-distance profiles were fit to steric force theory to estimate the density and thickness values of these exopolymers. The polymer densities were 3.4 x 10(16) to 7.1 x 10(16) molecules m(-2), and the eq...
متن کاملStudy of Membrane Fluidity of Acidithiobacillus ferrooxidans on Different Ores (Pyrite and Hematite)
Cell membranes are key structures existing in all living organisms in the world. Their importance in biology and medicine has been clear for many decades, and an extensive body of research for all aspects of their structure and function. They are ubiquitous in biology and are central to understanding key problems in biology and medicine (Lodish et al., 2000). All biological membranes are fluid ...
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Bacterial contact leaching of ores is more effective than non-contact leaching. Adhesion is the first step for leaching bacteria to form a biofilm on a mineral surface. Extracellular polymeric substances (EPS) are pivotal for mediating bacterial adhesion to a substratum. In order to clarify the role of EPS, we measured the adhesion forces between chalcopyrite-, sulfuror FeSO4·7H2O-grown cells o...
متن کاملAn Investigation the Effect of Acidithiobacillus Ferrooxidans Bacteria on Biomachining of Titanium Alloy and Copper
Recent advances in technology have increased the necessity of using components with Micro and Nano dimensions. In recent years, the use of bacteria as a renewable tool has hopeful applications in producing different work-pieces. In this study, the effect of Acidithiobacillus Ferrooxidans (A.F) on Vt20 (Titanium alloy) and Cu were investigated. The results illustrated that in the medium of the A...
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ژورنال
عنوان ژورنال: Minerals
سال: 2018
ISSN: 2075-163X
DOI: 10.3390/min8100422