一种双重功能不溶性离子液体,用于从电子废物中选择性回收黄金和铜
Sajith Babu M K1, Madhumitha Manickasundaram1, Srinivasarao Kancharla1
1Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur, 603203, Tamil Nadu, India.
ChemSusChem
|March 5, 2025
概括
这项研究介绍了一种新的离子液体,用于有效地从电子废物中回收黄金和铜. 该方法实现了高回收率和纯度,为关键金属回收提供了可持续的解决方案.
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:
- 减少的自然资源需要替代的金属来源.
- 电子废物 (电子废物) 富含黄金和铜等贵重金属.
- 从电子废物中有效和选择性地回收金属对于可持续性至关重要.
研究的目的:
- 为从电子废物中选择性回收黄金和铜开发一个碳基功能化的离子液体.
- 评估离子液在吸附黄金和浸出铜方面的效率和能力.
- 从废弃的CPU引脚中进行关键金属回收利用的可持续方法.
主要方法:
- 使用了一种基于carboxyl功能化的伊米达的离子液体,[C12C1COOHim]Br.
- 应用的离子交换金吸附从白水的溶液.
- 在水性介质中对铜进行选择性浸出时,与碳酸组进行了协调.
- 使用X射线光电子谱学 (XPS) 确认了结合相互作用.
主要成果:
- 在室温下获得96.7%的黄金回收,纯度>97%.
- 在65°C时获得99.1%的铜回收.
- 黄金的最大吸收能力为447 mg/g,铜的最大吸收能力为286 mg/g.
- 使用双重功能的离子液体,证明了两种金属的选择性回收.
结论:
- 开发的离子液有效和选择性地从电子废物中回收黄金和铜.
- 这种方法为金属回收提供了一种可持续且潜在的可扩展的方法.
- 该研究强调了循环经济中工业应用的潜力.
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