从城市固体废物焚烧中获得的贵金属的低排放资源循环,飞
Rajiv Ranjan Srivastava1, Gopa Nandikes2, Sadia Ilyas3
1Center for Advanced Chemistry, Institute of Research and Development, Duy Tan University, Da Nang 550000, Viet Nam; Resource Management, Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Viet Nam.
The Science of the total environment
|April 22, 2024
概括
本研究介绍了一种用于从焚烧飞灰中回收的水电金方法. 该工艺有效地回收和,产生适用于电池前体的高纯度,对环境的影响低于初级生产.
科学领域:
- 金工程 金工程 金工程
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
背景情况:
- 焚烧飞灰 (IFA) 含有宝贵金属,如,由于重金属污染,造成环境风险.
- 新出现的污染物,如IFA中的,需要有效的环境管理和资源回收的处理和回收策略.
- 水力金回收提供了一种可行的方法,用于从复杂的废物流中提取和净化金属,如IFA.
研究的目的:
- 调查含有的焚烧飞灰 (IFA) 的水力金回收.
- 优化出,分离和沉过程,以实现高效的金属回收和净化.
- 评估回收的潜在应用质量,并评估回收过程对环境的影响.
主要方法:
- 在高温下使用硫酸 (H2SO4) 溶解IFA,以提取和.
- 从中分离,使用溶剂提取与二-2-乙烯) 酸 (D2EHPA).
- 使用氧化酸,将作为氧酸盐 (CoC2O4) 沉,然后化为氧化物 (Co3O4) 并转化为氧化物 (LiCoO2).
主要成果:
- 实现了高效率:使用1.0mol/L H2SO4在90°C下1小时,达到~98%的和~96%的.
- 高效分离:使用D2EHPA从中去除99%以上的,然后用酸沉,溶液中只剩下5mg/L的.
- 高质量的产品:回收转化为具有良好的电化学特性 (128 mAh/g容量) 的LiCoO2前体,该过程与初级生产相比显示出明显较低的全球变暖潜力 (GWP).
结论:
- 开发的水电金工艺有效地从IFA中回收高纯度的.
- 回收方法为初级矿开采提供了一个环境可持续的替代方案,减少了温室气体排放.
- 回收的符合潜在用于离子电池等应用的质量标准.
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