Influence of silver ions on bioleaching of cobalt from spent lithium batteries |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China;2. Key Laboratory of Jiangxi Province for Persistant Pollutants Control and Resources Recycle, School of Environment and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, China;1. BK21 Plus Eco-Leader Education Center, Korea University, Seoul 136-713, Republic of Korea;2. Division of Environmental Science & Ecological Engineering, College of Life Sciences & Biotechnology, Korea University, 5-1 Anam-dong, Seongbuk-gu, Seoul 136-701, Republic of Korea;3. Division of Wood Engineering, Department of Forest Products, Korea Forest Research Institute, 57, Hoegiro, Dongdaemun-gu, Seoul 130-712, Republic of Korea;1. School of chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, PR China;2. School of Petroleum and Environment Engineering, Yanan University, Yanan 716000, PR China;3. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China |
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| Abstract: | The influence of silver ions (Ag+) on the bioleaching of cobalt from spent lithium batteries using Acidithiobacillus ferrooxidans (A. ferrooxidans) bacteria was investigated. The best effect was observed at Ag+ concentration of 0.02 g/L, and the amount of leached cobalt was 98.4% in a period of 7 days, whereas in the absence of Ag+, the amount of leached cobalt was only 43.1%. Based on the results of SEM, XRD and EDX investigation, it is deduced that Ag+ first reacted with cobalt to form AgCoO2 as an intermediate. A mechanism that is based on catalytic interactions is proposed to explain the enhanced leaching of Co using A. ferrooxidans. |
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| Keywords: | Bioleaching Catalyst Silver Spent lithium batteries |
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