1. Attachment of Acidithiobacillus ferrooxidans onto different solid substrates and fitting through Langmuir and Freundlich equations.
- Author
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Xia LX, Shen Z, Vargas T, Sun WJ, Ruan RM, Xie ZD, and Qiu GZ
- Subjects
- Acidithiobacillus chemistry, Acidithiobacillus cytology, Adsorption, Extracellular Space chemistry, Extracellular Space metabolism, Kinetics, Linear Models, Polysaccharides, Bacterial chemistry, Polysaccharides, Bacterial metabolism, Acidithiobacillus metabolism, Bacterial Adhesion physiology, Copper metabolism, Models, Theoretical, Quartz metabolism, Sulfur metabolism
- Abstract
Attachments of Acidithiobacillus ferrooxidans ATCC 23270 onto elemental sulfur, quartz and complex chalcopyrite were investigated by analysis of its extracellular polymeric substances as well as applying Langmuir and Freundlich equations. The two equations fitted the adsorption equilibrium data with significant correlation coefficient over 0.9. This indicated that bacterial attachment is complicated and involves Langmuir and Freundlich characterizations. Sulfur-grown cells showed the highest affinity for the three solid substrates. The investigated complex chalcopyrite possessed a higher maximum adsorption capacity for A. ferrooxidans than elemental sulfur or quartz. The Freundlich fitting parameters suggested that quartz had a weaker adsorption capacity and smaller adsorption areas than elemental sulfur or the complex chalcopyrite. It is not the content of total carbohydrates or proteins in EPS but their ratios that determine the affinity differences between cells and substrates.
- Published
- 2013
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