Isolation, identification and arsenic-resistance of Acidithiobacillus ferrooxidans HX3 producing schwertmannite
| Autor: | Ming Yang, Hui-Xin Xiong, Ting Yao, Yi-Qun Xu |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Hot Temperature
Environmental Engineering chemistry.chemical_element Arsenic Ferrous chemistry.chemical_compound Adsorption RNA Ribosomal 16S Environmental Chemistry Sulfate General Environmental Science Bacterial oxidation Mineral Sewage Strain (chemistry) Chemistry Schwertmannite Metallurgy Drug Resistance Microbial General Medicine Hydrogen-Ion Concentration Thiobacillus Environmental chemistry Microscopy Electron Scanning Oxidation-Reduction Iron Compounds |
| Zdroj: | Journal of Environmental Sciences. 26:1463-1470 |
| ISSN: | 1001-0742 |
| DOI: | 10.1016/j.jes.2014.05.012 |
| Popis: | Schwertmannite, a ubiquitous mineral present in iron oxyhydroxides formed in iron- and sulfate-rich acid media, favors incorporation of some toxic anions in its structure. We reported an iron-oxidizing bacterial strain HX3 from a municipal sludge that facilitates the formation of pure schwertmannite in cultures. Ferrous iron oxidation by the isolated strain HX3 was optimum at an initial pH of 2.0-3.3 and temperature of 28-35°C. Pure schwertmannite was found through bacterial oxidation of ferrous iron at an initial pH2.8 and temperature 28°C. Following 16S rDNA gene sequence analysis the bacterial strain HX3 was identified as Acidithiobacillus ferrooxidans. The arsenic-resistance A. ferrooxidans HX3 showed the potential of environmental application in arsenic removal from the As(III)- and iron-rich acid sulfate waters directly by As(III) adsorption or the formation of schwertmannite in the environment. |
| Databáze: | OpenAIRE |
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