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Updated: Sep 19, 2025

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Electrochemically and Bioelectrochemically Induced Ammonium Recovery
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通过流电极CDI恢复氨中的共存离子度极化:影响,机制和优化
1State Key Laboratory of Advanced Environmental Technology, Department of Environmental Science and Engineering, University of Science and Technology of China, Hefei 230026, China.
Environmental science & technology
|June 19, 2025
概括
流电极电容脱离离子 (FCDI) 有效地从废水中回收氨. 同时存在的离子通过导致氨反向扩散来阻碍性能,但并行的FCDI细胞系统可以改善长期的氨回收.
科学领域:
- 环境科学与工程环境科学与工程
- 电化学 电化学 电化学
- 水处理技术水处理技术
背景情况:
- 流电极电容性去离子化 (FCDI) 是从废水中可持续回收氨的有希望的技术.
- 废水中共存离子的存在严重挑战了FCDI系统去除氨的效率和稳定性.
研究的目的:
- 为了研究共存离子对气膜合FCDI系统中氨回收效率的干扰机制.
- 确定减轻离子干扰的策略,并提高FCDI在氨回收的长期性能.
主要方法:
- 使用气体膜合的FCDI系统,具有不同的碳质量负载,以评估氨回收性能.
- 采用双电流阶段测试来分析不同离子度下的氨跨膜传输机制.
- 实现了平行FCDI电池配置,以管理高盐和回收能量.
主要成果:
- 在单个FCDI电池 (10%的碳负载) 中实现了最佳性能,但由于氨反向扩散,在2小时内降解.
- 发现的反向扩散与共存的离子度和流电极碳负载有很强的相关性.
- 平行FCDI电池系统在100小时内表现出稳定性,达到954ppm的缩氨提取物.
结论:
- 同时存在的离子诱导度极化,阻碍了FCDI系统中的氨回收.
- 平行FCDI电池配置有效地解决了离子干扰,提高了氨回收效率和系统稳定性.
- 这项研究提供了对离子干扰机制的关键见解,并通过增强氨回收为废水资源利用提供了可持续的方法.
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