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使用离子液体从IC和CPU中提取黄金的完整水电金工艺的开发

Moisés Gómez¹, Sue Grimes¹, Geoff Fowler¹

¹Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, United Kingdom.

Journal of environmental management

|June 4, 2024

概括

本研究提出了一种使用离子液体从电子废物中回收黄金的更绿色方法. 开发的水电金工艺实现了超过95%的黄金回收效率从真正的电子废物.

科学领域:

材料科学材料科学材料科学
环境科学环境科学
化学工程是化学工程的重要组成部分.

背景情况:

集成电路 (IC) 和中央处理单元 (CPU) 含有黄金等贵重金属,通常度高于天然矿石.
电子产品中黄金需求的增加及其有限的供应需要有效的回收方法.
传统的电子废物回收技术面临着局限性,推动了对离子液体 (IL) 等更绿色替代品的需求.

研究的目的:

开发和验证一个完整的,更绿色的水力金工艺,从真正的电子废物 (电子废物) 部件中高效地回收黄金.
在将其应用于实际电子废物样本之前,使用模拟模型测试系统优化出和提取条件.
评估开发的黄金回收工艺的整体有效性和可重复使用性.

主要方法:

采用了两阶段的预处理,包括酸和皇家水中的水,以去除丰富的铜和丰富黄金.
从液中提取黄金,使用Cyphos 101的液体-液体提取或使用Cyphos 101装载的Amberlite XAD-7树脂进行吸附提取.
黄金被剥离并使用尿素在HCl中脱氧,然后通过减少玻利化以高纯度纳米颗粒 (≥95%) 恢复.

主要成果:

开发的水电金工艺实现了从真正的电子废物中获得≥95%的整体黄金回收效率.
液体液体提取和吸附提取方法都在黄金回收方面表现出高效率.
在该过程中使用的离子液体和树脂可以重复使用多达五次,这表明该过程具有良好的可持续性.

结论:

该研究成功开发和验证了两种高效,更绿色的水力金工艺,用于从电子废物中回收黄金.
这些方法为从各种富含黄金的电子废物流中回收黄金提供了有希望的方法,解决了环境和经济方面的问题.
证明IL和树脂的可重复使用性凸显了可持续和成本效益高的电子废物回收利用的潜力.

关键词:

电子垃圾回收回收利用黄金回收黄金回收黄金回收离子液体 - - 赛福斯101 液体液体提取方法液体液体提取方法吸附提取法吸附提取法

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