从超声波处理的制废弃印刷电路板中出铜:对参数优化和动力学进行研究
Rohit Jha1, Mudila Dhanunjaya Rao2, Kamalesh K Singh3
1Department of Metallurgical Engineering, Indian Institute of Technology (Banaras Hindu University), Varanasi, 221005, India. rohitjha.rs.met19@iitbhu.ac.in.
Environmental science and pollution research international
|August 6, 2024
概括
本研究提出了一种可持续的方法,用于从废弃印刷电路板 (WPCB) 中回收铜,使用子削和超声波处理. 该过程有效地增强了铜分数,并使用酸有效出,确保工业可行性.
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
- 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) 含有贵重金属和危险材料,如果填埋或焚烧,会给环境带来风险.
- 可持续的处理方法对于回收金属和减轻WPCB造成的污染至关重要.
研究的目的:
- 研究一种环保技术,将富含铜的部分从WPCB中分离出来.
- 为了优化酸漏参数,有效地回收铜.
- 评估拟议的WPCB处理工艺的工业可行性.
主要方法:
- 子削和超声波照射的组合,用于WPCB的预处理和分离.
- 用响应表面方法 (RSM) 优化金属丰富部分的酸出.
- 使用XRD,SEM-EDS,ICP/AAS和动力学研究进行分析,以描述过程.
主要成果:
- 超声波处理显著提高了WPCB中的铜分数,从42.73%提高到87%的重量.
- 在优化的漏条件下,使用3.5M酸在30°C的温度下实现了98.96%的铜溶解.
- 动力学研究确定了扩散和反应的激活能量,证实了过程效率.
结论:
- 子削和超声波照射方法提供了一种有效的,无溶剂的方法,用于从WPCB中回收铜.
- 优化的酸出显示了高的铜回收率.
- 该工艺具有低能耗和强大的工业可行性,用于可持续的WPCB回收利用.
相关概念视频
00:56Extraction: Advanced Methods
436
Metal ions can be separated from one another by complexation with organic ligands–the chelating agent– to form uncharged chelates. Here, the chelating agent must contain hydrophobic groups and behave as a weak acid, losing a proton to bind with the metal. Since most organic ligands used in this process are insoluble or undergo oxidation in the aqueous phase, the chelating agent is initially added to the organic phase and extracted into the aqueous phase. The metal-ligand complex is...
436
01:08Electrodeposition
616
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Electrodeposition can...
616