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From

Factorial Analysis of Lead Bioextracted Using Mixed Cultures of Acidithiobacillus Ferrooxidans and Acidithiobacillus Thiooxidans on Galena

C. I. Nwoye, E. M. Ameh, L. C. Oshionwu, M. A. Allen, M. O. Nwankwo, N. E. Idenyi

Biomedicine and Biotechnology. 2014, 2(2), 29-36 doi:10.12691/bb-2-2-1
  • Figure 1. (a) galena (as mined) (b) crushed and ground galena (c) galena concentrate (d) galena concentrate sieved to 100 μm for the bioleaching process.
  • Figure 2. XRD Analysis of the galena used
  • Figure 3. (a) residue from the bioleaching process (b) source of ATF and ATT
  • Figure 4. SEM of bioleaching residues (a), (b) and (c) after 70 hrs process time (d), (e) and (f) after 420 hrs process time
  • Figure 5. Coefficient of determination between the extracted lead concentrations and leaching time as obtained from experiment
  • Figure 6. Coefficient of determination between the extracted lead concentrations and leaching time as predicted by model
  • Figure 7. Coefficient of determination between the extracted lead concentrations
  • Figure 8. Coefficient of determination between the extracted lead concentrations and final solution pH as predicted by model
  • Figure 9. Comparison of extracted lead concentrations (relative to leaching time) as obtained from experiment and derived model
  • Figure 10. Comparison of extracted lead concentrations (relative to final solution pH) as obtained from experiment and derived model
  • Figure 11. Comparison of extracted lead concentrations (relative to leaching time) as obtained from experiment, derived model and regression model
  • Figure 12. Comparison of extracted lead concentrations (relative to final solution pH) as obtained from experiment, derived model and regression model
  • Figure 13. Variation of derived model predicted concentration of extracted lead with leaching time relative to its associated deviation from experimental results
  • Figure 14. Variation of deviation (of derived model predicted concentration of extracted lead from experimental result) with leaching time and final solution pH