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通过硫氧化氧化机制从电子废物液中选择性提取黄金,使用硫基功能化MOF

Jialong Qin¹, Hengzhi Liu², Zhuoya Fang³

¹College of Environmental Science and Engineering, Hunan University, Changsha, Hunan Province 410082, PR China; State Environmental Protection Key Laboratory of Environmental Health Impact Assessment of Emerging Contaminants, School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China.

|January 24, 2025

概括

我们开发了一种新的吸附剂,Zr-MSA-AA,用于有效地从电子废物中回收黄金. 这种材料具有很高的选择性和容量,为贵金属回收利用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
化学化学化学

背景情况:

电子废物 (电子废物) 的回收对于资源回收至关重要.
传统的从电子垃圾中提取贵金属的方法面临着选择性和容量的挑战.
开发先进的吸附剂是有效的城市采矿的关键.

研究的目的:

开发一种高度选择性和可回收的吸附剂,以有效地从电子废物中回收黄金.
使用新材料研究黄金吸附和减少的机制.
为了证明吸附剂在真实电子废物中实际应用的可用性.

主要方法:

合成一种硫醇功能化的基金属有机框架 (Zr-MSA-AA).
吸附剂在金离子回收中的性能 (容量,选择性,pH普遍性) 的表征.
涉及氧化还原转换和吸附动力学的机制研究.
用真正的电子废物液测试吸附剂.

主要成果:

Zr-MSA-AA表现出高的黄金回收能力 (1021 mg g-1) 和卓越的选择性 (Kd = 2.2 × 107 mL g-1).
吸附剂证明了pH普遍性能和快速吸附动力学 (kf = 1.17 × 10−7 m s−1).
从实际的电子废物液中成功地回收了高纯度黄金 (23.8克拉).

结论:

硫醇功能化Zr-MSA-AA是一种有效的吸附剂,用于选择性黄金回收.
该材料的氧化还原活性促进了高效的黄金减少和吸附,克服了传统方法的局限性.
这种方法为城市采矿和资源保护提供了一个可持续的战略.

关键词:

黄金回收黄金回收黄金回收金属有机框架的框架.资源循环利用资源循环利用选择性机制选择性机制硫烯的功能化作用

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