Extraction of nickel by microbial reduction of lateritic chromite overburden of Sukinda, India

Add time:08/02/2019    Source:sciencedirect.com

Microbial extraction of nickel from lateritic chromite overburden (COB), Sukinda by Acidithiobacillus ferrooxidans has been investigated in this work. In anoxic environment, A. ferrooxidans reduced the ferric iron in goethite [Fe(O)OH] mineral of COB by using elemental sulphur as electron donor. Nickel embedded in the complex goethite matrix of COB was successfully recovered by cumulative action of sulphuric acid, generated by oxidation of elemental sulphur and reduction of ferric iron in goethite matrix by A. ferrooxidans. Forty one percent of the nickel present in COB was extracted in a 3 L scale bioreactor (pH of 1.8 ± 0.05, temperature of 28 ± 2 °C) maintained in anoxic environment. In contrast, only 11% of the nickel present in COB was extracted with continuous supply of air to the bioreactor keeping all the parameters unchanged. Kinetics study of anoxic microbial processing of COB revealed that the chemical reaction rate control model fits to the rate of nickel dissolution (R2 = 0.975).

We also recommend Trading Suppliers and Manufacturers of NICKEL CHROMITE (cas 12018-18-7). Pls Click Website Link as below: cas 12018-18-7 suppliers

Prev:Ruthenium in chromite as indicator for magmatic sulfide liquid equilibration in mafic-ultramafic systems
Next:Hexavalent chromium remediation based on the synergistic effect between chemoautotrophic bacteria and sulfide minerals)