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| Influence of PEG2000 on Leaching of Tellurium Ore with Acidithiobacillus Ferrooxidans |
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Received:January 06, 2017
Revised:January 14, 2017
Accepted:January 16, 2017
Published Online:April 20, 2017
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| DOI：doi：10.3969/j.issn.1007-7545.2017.05.009 |
| KeyWord:Acidithiobacillus ferrooxidans; tellurium ore; oxidation; PEG2000 |
| Author | Institution |
| YANG Kai-zhi |
成都理工大学 材料与化学化工学院 |
| CHEN Mao |
成都理工大学 材料与化学化工学院 |
| WU Li-chuan |
成都理工大学 材料与化学化工学院 |
| XIE Hong-guan |
成都理工大学 材料与化学化工学院 |
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| Abstract: |
| Effects of mass fraction of polyethylene glycol 2000 (PEG2000) on activity of bacterium oxidized ferrous ion, solubility of tellurium ore, and process of bacterial leaching of low-grade tellurium by Acidithiobacillus Ferrooxidans were studied. The results show that adding PEG2000 with mass fraction of 0~0.09% can promote bacteria to oxidize ferrous ion and dissolve sample. Addition of 0.09% mass fraction of PEG2000 has the best oxidizing effect on tellurium ore with bacteria. After leaching for 24 days, the extracting amount of tellurium is 123.79 mg/L, which is 1.5 times of that with no addition of PEG2000. When addition mass fraction of PEG2000 is 0.12% above, PEG2000 has inhibitory effects on Acidithiobacillus ferrooxidans to oxidize tellurium ore, because high concentration of PEG2000 in solution may affect oxidative activity of bacterium. |
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