嗜酸氧化亚铁硫杆菌生物浸出废印刷电路板及其动力学研究。
Bioleaching waste printed circuit boards by Acidithiobacillus ferrooxidans and its kinetics aspect.
机构信息
Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China.
Key Laboratory of Solid Waste Treatment and Resource Recycle, Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, China.
出版信息
J Biotechnol. 2014 Mar 10;173:24-30. doi: 10.1016/j.jbiotec.2014.01.008. Epub 2014 Jan 18.
In this paper, H(+) consumption and metal recovery, during the process of bioleaching waste printed circuit boards (WPCBs) by Acidithiobacillus ferrooxidans (A. ferrooxidans), were discussed in detail. When the WPCBs concentration was 15g/L, Cu (96.8%), Zn (83.8%), and Al (75.4%) were recovered after 72h by A. ferrooxidans. Experimental results indicated that metal recovery rate was significantly influenced by acid. Based on experimental results, the kinetics of the H(+) consumption and metal recovery on bioleaching WPCBs were represented by reaction kinetic equations. The kinetic of H(+) consumption could be described by the second-order kinetic model. The metal recovery belongs to the second-order model with adding acid, which was changed to the shrinking core model with precipitate production.
本文详细讨论了嗜酸氧化亚铁硫杆菌（A. ferrooxidans）生物浸出废印刷电路板（WPCBs）过程中的 H(+)消耗和金属回收情况。当 WPCBs 浓度为 15g/L 时，经过 72 小时，A. ferrooxidans 可回收 96.8%的 Cu、83.8%的 Zn 和 75.4%的 Al。实验结果表明，酸对金属回收速率有显著影响。基于实验结果，用反应动力学方程来表示生物浸出 WPCBs 过程中 H(+)消耗和金属回收的动力学。H(+)消耗的动力学可以用二级动力学模型来描述。添加酸后金属回收属于二级模型，随着沉淀产物的生成，金属回收转变为收缩核模型。
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