来自多金属废弃物系统及其机制的银的微电驱动的选择性液和脉冲电沉积
Liu Xia1, Ya Liu1, Zhenming Xu2
1School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China.
Journal of hazardous materials
|September 17, 2025
概括
这项研究引入了一种绿色技术,用于从废物流中利用选择性液和脉冲电沉积来回收银. 这种创新方法实现了高的白银回收效率,减少了环境影响,并为可持续的金属回收提供了经济效益.
科学领域:
- 材料科学与工程 材料科学与工程
- 环境科学与技术 环境科学与技术
- 电化学 电化学 电化学
背景情况:
- 银是一种重要的战略金属,对电子,医疗保健和新能源行业至关重要.
- 传统的白银回收方法效率低,能源密集,污染,不适合低档资源.
- 从二次来源可持续地回收白银对于减轻环境风险和减少初级资源耗尽至关重要.
研究的目的:
- 开发一种高效,绿色和节能的技术,用于从多金属废物流中回收银.
- 为了提高银的回收,利用微选择性水和脉冲电沉积.
- 评估拟议的回收过程的环境和经济可行性.
主要方法:
- 使用在酸 (HNO3) 中形成的微网对金属进行选择性浸,从而促进腐蚀.
- 脉冲电位,采用暂时的静电刺激,交替放松以恢复银.
- 机制研究以阐明脉冲电位在维持界面反应活性和动力学中的作用.
主要成果:
- 在低运行强度下,可实现超过95%的选择性漏效率.
- 脉冲电解沉积证明,从低度的液中,银的回收效率为98.98%.
- 该过程预计将减少CO2排放46.7t/t废物,节约38.11%的能量,并降低毒性121%.
结论:
- 开发的微选和脉冲电沉积工艺为银的回收利用提供了一种高效和环保的策略.
- 这项技术有效处理低质量的资源,为循环经济和资源可持续性做出贡献.
- 该过程带来了显著的环境效益和大量的净利,使其在经济上具有吸引力.
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