Influences of Solution pH and Redox Potential on the Bioleaching of LiCoO2 from Spent Lithium-ion Batteries

다국어 초록 (Multilingual Abstract)

The influences of solution pH and redox potential on bioleaching of LiCoO2 from spent lithium-ion batteries using Acidithiobacillus ferrooxidans were investigated. Bioleaching at different initial pH and ferrous ion (Fe2+) concentrations were carried out, and electrochemical behavior of LiCoO2 dissolution was examined to study the effect of solution redox potential on the bioleaching process. The results showed maximum cobalt dissolution at initial pH of 1.5 and initial Fe2+ concentration of 35 g/L, and cobalt dissolution showed only slight relationship with pH of solution. Nonetheless, there was improvement of cobalt dissolution at higher redox potential. The cyclic voltammograms showed that dissolution rates increase when the solution potentials are higher than 0.4 V, and rapid decrease at 1.3 V. The anodic polarization curves indicated that the corrosion, primary passive, and passivation potentials were 0.420, 0.776 and 0.802 V, respectively.

참고문헌 (Reference)

1 Aral H, "Toxicity of lithium to humans and the environment-a literature review" 70 : 349-356, 2008

2 Wen SM, "Thermodynamic analysis and potential-pH diagrams of Li-Co-H2O system" 29 : 423-426, 2005

3 Mahmood MN, "The selective leaching of zinc from chalcopyrite-sphalerite concentrates using slurry electrodes" 14 : 317-329, 1985

4 Watling HR, "The bioleaching of sulphide minerals with emphasis on copper sulphides-A review" 84 : 81-108, 2006

5 Gericke M, "Tank bioleaching of low-grade chalcopyrite concentrates using redox control" 104 : 414-419, 2010

6 Dewulf J, "Recycling rechargeable lithium ion batteries: Critical analysis of natural resource savings" 54 : 229-234, 2010

7 Paulino JF, "Recovery of valuable elements from spent Li-batteries" 150 : 843-849, 2008

8 Li L, "Recovery of cobalt and lithium from spent lithium ion batteries using organic citric acid as leachant" 176 : 288-293, 2010

9 Petersen J, "Modelling zinc heap bioleaching" 85 : 127-143, 2007

10 Yelloji RK, "Growth and attachment of Thiobacillus ferrooxidans during sulfide mineral leaching" 50 : 203-210, 1997

11 Chen SY, "Enhancement of metal bioleaching from contaminated sediment using silver ion" 161 : 893-899, 2009

12 Li HX, "Electrochemical behavior of chalcopyrite in presence of Thiobacillus ferrooxidans" 16 : 1240-1245, 2006

13 Modak JM, "Development of temperature tolerant strains of Thiobacillus ferrooxidans to improve bioleaching kinetics" 42 : 51-61, 1996

14 Third KA, "Control of the redox potential by oxygen limitation improves bacterial leaching of chalcopyrite" 20 : 433-441, 2002

15 Hansford GS, "Chemical and electrochemical basis of bioleaching processes" 9 : 13-26, 2001

16 Olson GJ, "Bioleaching review part B: Progress in bioleaching: applications of microbial processes by the minerals industries" 63 : 249-257, 2002

17 Mishra D, "Bioleaching of metals from spent lithium ion secondary batteries using Acidithiobacillus ferrooxidans" 28 : 333-338, 2008

18 Xin BP, "Bioleaching mechanism of Co and Li from spent lithium-ion battery by the mixed culture of acidophilic sulfuroxidizing and iron-oxidizing bacteria" 100 : 6163-6169, 2009

19 Wang RC, "A novel recovery process of metal values from the cathode active materials of the lithium-ion secondary batteries" 99 : 194-201, 2009

20 Li JH, "A combined recovery process of metals in spent lithium-ion batteries" 7 : 1132-1136, 2009