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在超临界甲醇预处理后使用甘氨酸从废弃的印刷电路板中提取增强的铜:过程优化,出动力学和热力学分析

Rima Kumari¹, Roshan Prabhakar², Sukha Ranjan Samadder³

¹Department of Environmental Science & Engineering, Indian Institute of Technology (Indian School of Mines), Dhanba 826004, India.

Waste management (New York, N.Y.)

|January 3, 2025

概括

本研究介绍了甘氨酸作为从废弃印刷电路板 (WPCB) 中提取铜的绿色替代品. 一种集成的超临界甲醇预处理和甘氨酸浸出方法实现了97.46%的铜提取效率.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
化学工程是化学工程的重要组成部分.

背景情况:

废弃印刷电路板 (WPCB) 是危险的电子废物,但含有贵重金属.
从WPCB中可持续地回收金属对于环境保护和资源管理至关重要.

研究的目的:

探索甘氨酸作为一个环保的液剂,用于从WPCB中提取铜.
为了提高铜回收效率,使用联合超临界甲醇预处理和甘氨酸漏方法.

主要方法:

优化的甘氨酸浸出参数:0.5 M甘氨酸,5% H2O2,1.5:100 g/mL固体与液体的比率,40°C.
集成超临界甲醇预处理以改善质量转移.
动力学研究以确定反应机制和激活能量.

主要成果:

在最佳条件下,在15小时内实现了97.46%的铜提取效率.
确定了一种混合控制的反应机制,激活能量为40.01kJ/mol.
描述了回收的金属水盐,以了解水过程.

结论:

集成的甘氨酸水和超临界预处理为WPCB处理提供了一种可持续和环保的方法.
这种方法有效地降低了WPCB的危险性,同时恢复了有价值的铜.
有助于推进电子废物管理和促进环境可持续性.

关键词:

铜的提取铜的提取甘氨酸 (Glycine) 是一种漂水动力学漂水动力学在WPCB上使用WPCB.

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