Column bioleaching of apatite rich low grade Indian uranium ore
The bio-leaching of a high apatite containing low grade Indian uranium ore (0. 047％ U3O8) with ferrosilicate, magnetite and apatite as the major phases, and hematite and pyrite in minor amounts, has been reported. Bioleaching experiments were carried out in laboratory scale column reactors (2. 0 kg) filled with particles in the size range 5 mm to 4 mm and inoculated with enriched culture of Acidithiobacillus ferrooxidans isolated from the source mine water. With the presence of 12. 9％ Fe in the ore, the uranium bio-recovery of 57％ was observed with increase in cell counts from 5. 3 x 107 to 8. 2 X 108 cells/mL at pH 1.7 in 40 days time. The dissolution of uranium under chemical leaching conditions however, recorded a lower value of 39％ during the same period at room temperature. The bioleaching behavior of uranium from this ore has been correlated with the iron (II) and iron (III) concentrations in the solution, the redox potential values acquired and the phase identification of the leach residue by XRD.
bioleaching apatite rich uranium Acidithiobacillus ferrooxidans- ferric ions column
Abhilash B. D. Pandey L. Ray
National Metallurgical Laboratory (CSIR-NML), Jamshedpur, India FTBE Dept. , Jadavpur University, Kolkata, India
国际会议
The 19th International Biohydrometallurgy Symposium(第19届国际生物湿法冶金大会 IBS2011)
长沙
英文
680-683
2011-09-18（万方平台首次上网日期，不代表论文的发表时间）