通过连续流量微型开采系统有效地回收和丰富稀土元素
Zhuo Chen1, Jifang Yuan1, Yuhang Dong1
1The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China.
Fundamental research
|June 27, 2024
概括
本研究介绍了一种使用磁性Janus纳米粒子的绿色微流体技术,以有效地从废水中回收稀土元素 (REEs). 该方法增强了提取剂分散和相分离,为经济和环境带来了好处.
科学领域:
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
- 材料科学 材料科学 材料科学
背景情况:
- 过度利用稀土元素 (REE) 会耗尽资源并损害生态系统.
- 采矿和炼的废水含有低度的可再生能源,需要有效的回收方法.
- 传统的REE提取方法面临的挑战是提取剂的分散,相位分离和长时间的加工时间.
研究的目的:
- 开发一种绿色和高效的技术,从废水中提取低度的REEs.
- 研究使用液滴式微流体和Janus纳米颗粒来增强REE回收.
- 为了优化提取参数,如pH值,停留时间和纳米粒子度.
主要方法:
- 基于滴滴的微流体系统被用于连续的REE提取.
- 雪人形状的磁性Janus纳米颗粒被用作连续相的乳化剂.
- 系统地研究了影响提取效率的关键因素,包括pH值,停留时间和纳米粒子剂量.
主要成果:
- 微流体技术实现了在较大的相位比率下持续提取和回收低度的REEs.
- 简斯纳米粒子促进了提取剂的均分散和快速相隔,提高了提取效率.
- 开发的方法比传统的批量提取具有优势,包括较大的特定表面积和更快的分离速度.
结论:
- 基于滴滴的微流体与Janus纳米颗粒相结合,为REE丰富和回收提供了一种可行和高效的方法.
- 在多个提取周期中,Janus纳米颗粒显示出良好的乳化稳定性.
- 这种技术为与废水中的REE回收相关的经济和环境挑战提供了有希望的解决方案.
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