从使用过的水处理催化剂 (HPC) 中回收全部组件的高效回收,最低限度的CO2和SO2排放
Guodong Xu1, Junlian Wang1, Fei Xu1
1School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
Journal of environmental management
|January 26, 2025
概括
这项研究使用高效的水电金工艺从已耗尽的HPC中回收和. 开发的方法实现了贵金属的高回收率,同时最大限度地减少了对环境的影响.
科学领域:
- 金工程 金工程 金工程
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
背景情况:
- 使用过的高功率电容器 (HPC) 含有宝贵的金属,如和.
- 这些金属的有效回收对于资源可持续性和减少环境污染至关重要.
- 之前的工作集中在V,Mo和Al回收上,需要专门的Co和Ni过程.
研究的目的:
- 开发和优化一种用于从废弃HPC的性液残留物中回收 (Co) 和 (Ni) 的水电金工艺.
- 描述漏残留物并评估分离和净化步骤的效率.
- 评估拟议的回收过程对环境的影响.
主要方法:
- 使用SEM-EDS,XPS,TGA,激光颗粒大小分析仪和ICP-OES,对浸出残留物进行表征.
- 使用硫酸 (H2SO4) 优化Ni和Co浸出.
- 用P204.4.4进行 (Al) 除去的溶剂提取.
- 使用Cyanex 272.2进行对流提取,以分离Co和Ni.
- 密度函数理论 (DFT) 计算用于绑定能量分析.
- 使用X射线衍射 (XRD) 进行产品表征.
主要成果:
- 对于Ni和Co,高水率 (约95%) 在120°C下以2.0mol/L的H2SO4达到75分钟的水率.
- 使用30%的P204.4.有效地从液中去除Al杂质.
- 通过使用20%的Cyanex 272.2的两阶段逆流提取,成功地将Co和Ni从拉芬酸中分离出来.
- 获得的高纯度CoSO4和NiO产品,通过XRD证实.
- 据DFT的计算显示,Cyanex 272适合用于CO/Ni分离.
结论:
- 提出了一种新型的水电金工艺,用于有效地从废弃的高化中回收和的性洗残留物.
- 该工艺证明了高金属回收率和产品纯度.
- 拟议的方法产生的二氧化碳和二氧化排放量明显较低,相比于火水金替代品,突出其环境效益.
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