建筑复合材料反透膜具有多重屏障,用于增强的选择性.
Yi-Yu Ling1, Ke-Xin Yuan1, Siming Xie1
1State Key Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology, Harbin 150090, PR China.
Environmental science & technology
|November 13, 2025
概括
一种新型的反透膜,增强了聚胺胺 (PAMAM) 树突体,显著改善了废水处理中的氨去除,达到98.39%的排斥率. 这种先进的膜技术提高了水的循环利用和可持续性.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 化学工程是化学工程的重要组成部分.
背景情况:
- 传统的反透 (RO) 膜在废水处理中表现出有限的氨 (NH4+-N) 排斥 (∼93%).
- 有效的氨去除对于回收水和实现可持续发展目标至关重要.
研究的目的:
- 开发一种新的薄膜复合RO (TFC-RO) 膜,具有增强的氨排斥能力.
- 研究功能化膜改善氨排斥背后的机制.
主要方法:
- 通过将聚胺胺 (PAMAM) 树突分子合到聚胺 (PA) 层中来制造TFC-RO膜.
- 膜结构,表面电荷和自由体积属性的表征.
- 通过膜性能测试评估氨排放和水透性.
主要成果:
- 用PAMAM合的TFC-RO膜实现了98.39%的异常NH-N排斥,超过了常规膜.
- PAMAM树突分子优化了界面聚合,创造了一个缺陷减少的PA层,改进了尺寸和保持水透性 (3.74 L/m2·h·bar).
- 确定了一种协同作用的"结构-电荷-度"机制,涉及质子胺组和分子模拟,用于有效的NH抑制.
结论:
- 填充集成的TFC-RO膜设计为废水中氨去除提供了高度有效的解决方案.
- 这种先进的膜技术有助于高效的低碳水回收和可持续的水资源管理.
- 该研究提出了一种有前途的方法,用于开发下一代膜,用于具有挑战性的水处理应用.
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