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对影响废母板PCB选择性漏贵金属的变量进行选

Vahid Rahimi¹, Emilio Antonio Inzulza-Moraga¹, Diego Gómez-Díaz¹

¹Department of Chemical Engineering, School of Engineering, Universidade de Santiago de Compostela, Rúa Lope Gómez de Marzoa s/n, 15782, Santiago de Compostela, Spain.

Environmental science and pollution research international

|March 9, 2024

概括

这项研究开发了一种两阶段的环保工艺,用于从废弃的印刷电路板 (PCB) 中回收基础金属 (Cu,Pb,Sn) 和贵金属 (Au,Ag,Pd). 顺序漏方法被证明比单阶段方法更有效,以有效地回收金属.

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:

废弃的印刷电路板 (PCB) 含有有价值和危险的金属,需要回收以获得经济和环境的好处.
城市采矿过程对于可持续的资源管理和减少电子垃圾对环境的影响至关重要.

研究的目的:

研究一种选择性,顺序的,两阶段的漏工艺,从废弃主板中回收普通金属 (Cu,Pb,Sn) 和贵金属 (Au,Ag,Pd).
为了比较两个阶段的浸出过程与单阶段的过程的效率.
为了确定影响金属回收的重要变量,在每个漏阶段.

主要方法:

采用了一种连续的两阶段漏工艺,用于基础金属使用酸和盐酸,用于贵金属使用硫酸和硫酸.
选实验设计被用来确定影响金属漏的重要变量.
对酸度,颗粒大小,温度,时间和pH等漏参数进行了优化.

主要成果:

与单阶段方法相比,两阶段的漏过程显示出优越的基础和贵金属回收.
酸在出Cu和Pb方面更有效,而盐酸在Sn方面更有效.
尿素显示出更高的Au漏,硫酸盐在Pd漏方面表现出色,Ag回收与两种药物相似.

结论:

一个连续的两阶段漏过程是从废弃PCB中选择性回收金属的更有效的策略.
优化条件,包括酸度,粒子大小,温度,时间和pH值,对于最大限度地回收金属至关重要.
这项研究有助于推进可持续电子废物管理的城市采矿技术.

关键词:

基本的金属基本的金属泄漏泄漏是一种泄漏.贵金属贵金属是一种贵金属.选设计的设计.废弃的主板PCB的废弃物

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