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[Reduction of selenite to elemental red selenium under aerobic condition by Pseudomonas alcaliphila MBR]
Huadong Jiang1, Xiaohong He, Lixia Zhang
1College of Life Science, Sichuan University, Chengdu 610064, China. jhdscu@163.com
Objective:
We studied the reduction of soluble and highly toxic selenite to elemental red selenium, under aerobic condition by Pseudomonas alcaliphila MBR, with organic carbon as electron donor.
Results:
The strain could grow under pH 6-11 and resist to high concentration of selenite with the minimal inhibitory concentration of 50 mmol/L. After 5 days, the strain used sodium citrate as electron donor, and reduced 2.0 mmol/L selenite to elemental red selenium from the culture fluid, the elemental red selenium was stored outside the cells. The glutathione and nitrate could increase the number of reduction rate.
Conclusion:
This study implies the application of Pseudomonas alcaliphila MBR to convert selenite to elemental red selenium.
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