从多层陶电容中可持续地回收Cu,Fe,Ni和Zn,使用一种三级深层欧性溶剂
Jordy Masache-Romero1, Katherine Moreno1, Fernando Sánchez2
1Department of Extractive Metallurgy, Escuela Politécnica Nacional, Ladrón de Guevara E11-253, P.O. Box 17-01-2759, Quito 170525, Ecuador.
Molecules (Basel, Switzerland)
|November 13, 2025
概括
这项研究探讨了从电子垃圾中回收金属的绿色溶剂. 基于酸的深溶剂有效地从多层陶电容器中提取铜,和.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 可持续技术 可持续技术
背景情况:
- 电子废物 (电子废物) 迅速增加,需要可持续的金属回收方法.
- 计算机印刷电路板 (PCB) 的多层陶电容器 (MLCC) 含有贵重金属.
- 传统的酸性漏会给环境带来挑战.
研究的目的:
- 调查深度环氧溶剂 (DES) 作为绿色替代品的有效性,用于从MLCC中回收金属.
- 用酸 (CA),甘油 (GLY) 和三元混合物 (GLY-CA) 评估基于胆化物的DES.
- 评估铜,,和铁的选择性回收.
主要方法:
- 从PCB中手工回收MLCC,经过热处理并粉碎.
- 描述涉及X射线光和X射线衍射.
- 漂水实验使用了三个DES (ChCl-CA,ChCl-GLY,ChCl-GLY-CA) 在24小时内进行.
- 用原子吸收光谱分析了液中的金属度.
主要成果:
- 通过CA和GLY-CA DESs实现了铜的完全回收 (100%).
- 的回收率达到100%与CA和中等的GLY-CA.
- 观察到高回收 (99%) 的CA和GLY-CA.
- 铁的回收率高达60%,受其化学形式的影响.
- 三元的GLY-CA DES具有较低的粘度,提高了可用性.
结论:
- 基于酸和三元 (GLY-CA) 的DES是有效的,低毒性的液剂,用于从MLCC中回收关键金属.
- 这些绿色溶剂为传统的酸方法提供了可持续的替代方案.
- 该研究表明,利用DESs,可以有效地从电子垃圾中回收金属.
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