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从废弃的印刷电路板中回收铜,使用金作为生物溶解基质

Zexiang Xie¹, Qaisar Mahmood², Shaohui Zhang^3,4

¹School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, 430070, People's Republic of China.

Environmental science and pollution research international

|May 2, 2024

概括

这项研究表明,使用矿作为细菌基质用于生物溶解废弃印刷电路板 (WPCB) 来回收铜的可行性. 最佳条件实现了高铜出和电沉积效率,提供了一种新的回收方法.

科学领域:

环境科学与工程环境科学与工程
生物技术是生物技术.
材料科学材料科学材料科学

背景情况:

废弃印刷电路板 (WPCB) 由于其复杂的组成和有价值的金属含量,造成了重大的环境挑战.
从WPCB中回收铜的传统方法往往是能源密集型和环境负担.
缺乏合适的细菌基质阻碍了WPCB有效的生物溶解过程.

研究的目的:

调查使用矿作为细菌基质,用于从WPCB中生物溶解铜.
为了确定WPCBs预处理,生物溶解和铜回收的最佳条件.
为了评估从生物化溶液中通过电沉积回收铜的效率.

主要方法:

WPCBs使用机械粉碎进行了预处理.
生物化实验是使用矿作为细菌基质进行的,其中优化了WPCB和矿纸密度,以及源比率.
铜回收是在受控条件下从生物化溶液中通过直接电沉积进行的.

主要成果:

机械粉碎被确定为WPCB的有效预处理方法.
在生物炼的最佳条件下 (1.25%WPCB,1.0% pyrite,2 g/L (NH4) 2SO4:2 g/L (NH4) 2HPO4) 在14天内产生了95.60%±1.57%的铜炼效率.
在最佳条件下 (7.34 g/L Cu2+,pH 2.75,200 A/m2) 实现了92.19%±1.35%的铜回收效率在60分钟内,铜和氧化铜作为主要阴极沉积物.

结论:

石作为一种可行的细菌基质,用于从WPCB中生物溶解铜.
集成的生物冲洗和电沉积工艺为从电子废物中回收铜提供了一种高效和新的方法.
这项研究为管理WPCB和回收贵金属提供了可持续的途径.

关键词:

生物接触可以达到生物接触.铜回收铜回收铜回收电极定位是一种电极定位.皮里特矿是一种矿.废弃的印刷电路板废弃的印刷电路板

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