相关实验视频
Updated: Sep 11, 2025

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Electrochemically and Bioelectrochemically Induced Ammonium Recovery
Published on: January 22, 2015
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工程皇冠以太功能化水凝使选择性氨提取成为可能
Meibo He1,2, Boyan Xu1,3, Tze Chiang Albert Ng1
1National University of Singapore Environmental Research Institute, 5A Engineering Drive 1, Singapore 117411, Singapore.
Langmuir : the ACS journal of surfaces and colloids
|August 18, 2025
概括
具有15-皇冠-5的功能化聚烯酸) 水凝显著改善了废水中的氨回收. 这种方法提高了对和离子的选择性,这对于资源回收策略至关重要.
科学领域:
- 环境科学 环境科学
- 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.
背景情况:
- 氨 (NH4+) 的回收对于从污染物去除到资源回收的过渡至关重要.
- 由于 (K+) 和 (Na+) 等离子的竞争,从废水中捕获氨很困难.
研究的目的:
- 通过将它们与15-crown-5 (15C5) 功能化,提高聚烯酸 (PAA) 水凝中的氨选择性.
- 在存在竞争性子时,研究增强结合和选择性背后的机制.
主要方法:
- 使用15-皇冠-5.5的PAA水凝的功能化.
- 对未经修改和修改的水凝进行了阴离子选择性测试.
- 氨复合和溶解效应的机械分析.
主要成果:
- 没有修改的PAA水凝显示了K+>Na+>NH4+的阴离子偏好.
- PAA-g-15C5水凝逆转了选择性顺序到K+ > NH4+ > Na+,改善了Na+的排斥.
- 在介质离子度 (~1.8 mmol/L) 时,可以达到对Na+ (1.8) 的最佳NH4+选择性.
- 选择性取决于初始离子度和接触时间,受 1:1 和 2:1 复合的影响.
结论:
- PAA-g-15C5水凝为从复杂废水中选择性回收氨提供了一个有希望的策略.
- 对复杂形成和溶解的机械洞察力有助于优化水凝性能,以实现可持续的资源回收.
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