Key Laboratory of Jiangxi Province for Ecological Diagnosis-Remediation and Pollution Control, Nanchang Hangkong University, Nanchang 330063, PR China.
J Hazard Mater. 2012 Jan 15;199-200:164-9. doi: 10.1016/j.jhazmat.2011.10.063. Epub 2011 Oct 29.
A copper-catalyzed bioleaching process was developed to recycle cobalt from spent lithium-ion batteries (mainly LiCoO(2)) in this paper. The influence of copper ions on bioleaching of LiCoO(2) by Acidithiobacillus ferrooxidans (A.f) was investigated. It was shown that almost all cobalt (99.9%) went into solution after being bioleached for 6 days in the presence of 0.75 g/L copper ions, while only 43.1% of cobalt dissolution was obtained after 10 days without copper ions. EDX, XRD and SEM analyses additionally confirmed that the cobalt dissolution from spent lithium-ion batteries could be improved in the presence of copper ions. The catalytic mechanism was investigated to explain the enhancement of cobalt dissolution by copper ions, in which LiCoO(2) underwent a cationic interchange reaction with copper ions to form CuCo(2)O(4) on the surface of the sample, which could be easily dissolved by Fe(3+).
本文开发了一种铜催化的生物浸出工艺，用于从废旧锂离子电池（主要为 LiCoO₂）中回收钴。研究了铜离子对嗜酸氧化亚铁硫杆菌（A.f）浸出 LiCoO₂的影响。结果表明，在存在 0.75 g/L 铜离子的条件下，生物浸出 6 天后，几乎所有的钴（99.9%）都进入溶液，而没有铜离子时，10 天后仅得到 43.1%的钴溶解。EDX、XRD 和 SEM 分析进一步证实，在铜离子存在的情况下，可以提高废旧锂离子电池中钴的溶解。研究了催化机制，以解释铜离子对钴溶解的增强作用，其中 LiCoO₂与铜离子发生阳离子交换反应，在样品表面形成 CuCo₂O₄，可被 Fe（3+）轻易溶解。
