从电子垃圾中提取黄金,使用高强度聚焦超声波
Axi Holmström1, Topi Pudas1, Jere Hyvönen1
1Electronics Research Laboratory, Faculty of Science, University of Helsinki, P.O.B. 64, FIN-00014 University of Helsinki, Finland.
Ultrasonics sonochemistry
|October 22, 2024
概括
这项研究引入了一种新的环保方法,利用超声波和水从电子废物中回收黄金. 这种基于化技术有效地从印刷电路板上去除金层,最大限度地减少环境影响并支持可持续实践.
科学领域:
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
- 工程 工程师 工程师 工程师
背景情况:
- 电子产品中对稀有和贵金属 (RPM) 的需求不断增加,推动了技术进步.
- 由于RPM的稀缺性,对RPM的初始开采变得越来越困难和昂贵.
- 全球每年产生超过6200万电子垃圾,这对回收提出了重大挑战.
研究的目的:
- 开发一种可持续和有效的方法来从电子废物 (电子废物) 中提取和回收黄金.
- 调查使用高强度聚焦超声波和水对选择性黄金层侵蚀的使用.
- 将回收利用实践与联合国可持续发展目标12相协调.
主要方法:
- 使用11.8MHz的超声波传感器进行成像和从印刷电路板 (PCB) 中选择性去除黄金.
- 使用水中的聚焦超声波诱导的化,以侵蚀黄金层.
- 通过调整超声波爆发的数量和优化能源效率来控制黄金的去除.
主要成果:
- 通过超声波诱导的洞化,成功地从PCB中控制地去除金层.
- 确定了能源效率的最佳条件,包括最小的底层层去除.
- 展示了一种更绿色的替代传统的金和水金回收工艺.
结论:
- 开发的超声波方法为电子垃圾中的黄金回收提供了一种环保的方法.
- 选择性去除黄金减少了对广泛下游加工的需求.
- 这种创新有助于可持续的消费和生产模式,与可持续发展目标12保持一致.
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