通过基于电透析 (ED) 的工艺加强从酸性废水中去除和回收过渡金属离子
Petric Marc Ruya1, Miguel Perdigão Silva2, Geert Reyniers2
1Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F B-3001 Leuven, Belgium.
Water research
|March 19, 2025
概括
本研究探讨了用于从工业废水中回收和的电透析. 脉冲电场和超临界水气化集成显著提高金属回收效率,减少处理时间.
科学领域:
- 环境化学环境化学
- 化学工程是化学工程的组成部分.
- 材料科学是一种材料科学.
背景情况:
- 工业过程产生含有重要金属的废水,如 (Co) 和 (Mn).
- 现有的方法从低度,有机丰富的废水中回收这些金属是不够的.
- 开发可持续的金属回收解决方案对于循环经济原则至关重要.
研究的目的:
- 研究使用电透析 (ED) 来从含有高有机酸的合成废水中回收Mn2+和CO2+的可行性.
- 确定传统ED的性能限制,并探索加强金属离子回收效率的方法.
- 评估ED与预处理方法的整合,以改善废水处理.
主要方法:
- 常规电透析 (ED) 的参数研究,采用不同的接收溶液和应用电压.
- 脉冲电场 (PEF) 电透析的应用,以克服度极化.
- 集成ED与超临界水气化 (SCWG) 作为预处理步骤来去除有机酸.
- 模拟用于性能和能源分析的集成ED-SCWG流程.
主要成果:
- 导电接收解决方案提高了金属离子传输率 (ITR) ~26%,并减少了传统ED的能耗.
- 与传统ED相比,脉冲电场 (PEF) 电透析实现了40%更高的CO2+ITR.
- 来自酸的H+离子的竞争性运输阻碍了金属离子的转移.
- 模拟ED-SCWG过程显示,可能减少50%的处理时间和能源自给自足.
结论:
- 传统的ED在复杂废水中的金属回收量转移方面存在局限性.
- 脉冲电场 (PEF) 电透析和与SCWG的集成为加强金属回收提供了有希望的战略.
- 先进的过程集成对于开发可持续的废水处理技术和闭环工业解决方案至关重要.
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