优化从电子废弃物中选择性地用水合金术回收的优化,使用热石
Jutta Koskinen1, Janne Frimodig1, Mikko Samulinen2
1Department of Chemistry, University of Jyväskylä, P.O. Box 35, Jyväskylä FI-40014, Finland.
ACS omega
|April 8, 2024
概括
一种新的方法有效地从电子垃圾中回收,使用超声波辅助消化和ZSM-5热. 该工艺实现了超过98%的回收,支持可持续的高科技金属需求.
科学领域:
- 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.
- 环境科学 环境科学
背景情况:
- 对等高科技金属的需求不断增长,需要可持续的采购.
- 电子废物 (e-waste) 是一种重要的,但未被充分探索的贵金属来源.
- 有效和选择性的回收方法对于循环经济原则至关重要.
研究的目的:
- 开发一种选择性和高效的方法,从电子废物中回收.
- 为了优化超声波辅助消化过程的溶解.
- 为了评估ZSM-5热在吸附和回收方面的性能.
主要方法:
- 使用硫酸 (H2SO4) 和酸 (HF) 在60°C的超声波辅助消化.
- 为最大溶解率优化消化参数.
- 在特定的H2SO4度下使用ZSM-5热酸盐从浸出物中吸附.
- 使用稀释的乙醇胺选择性化吸附的.
主要成果:
- 经过优化消化,电子废弃物样本中的坦坦度达到11000 ± 1000 mg/kg.
- 泽奥利特ZSM-5证明了超过98%的回收效率.
- 在0.5mol/L H2SO4下确定了最佳吸附条件,吸附能力为10.5 ± 0.6 mg/g.
- 使用稀释的乙醇胺,选择性化产生了87.2 ± 1.5%的.
结论:
- 开发的方法为从电子废物中回收提供了一个高度选择性和高效的途径.
- 超声波辅助消化和ZSM-5热吸附为可持续的采购提供了一个可行的策略.
- 这种方法有助于减少对初级采矿的依赖,并促进资源循环.
更多相关视频
11:14Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
Published on: February 21, 2017
12.4K
09:46Adsorption Device Based on a Langatate Crystal Microbalance for High Temperature High Pressure Gas Adsorption in Zeolite H-ZSM-5
Published on: August 25, 2016
11.6K
相关概念视频
00:56Extraction: Advanced Methods
446
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...
446
00:52Washing, Drying, and Ignition of Precipitates
911
After filtration, the precipitate is washed to remove coprecipitated impurities and any remaining mother liquor. Colloidal precipitates, such as silver chloride, are washed with an electrolyte (such as dilute nitric acid) to prevent the peptization of the precipitate. In the case of slightly soluble precipitates, the wash solution contains a common ion to reduce solubility. Lead sulfate, which is slightly soluble in water, is washed with dilute sulfuric acid. Similarly, wash solutions may be...
911