通过结合激活PDA来定制复合PEI纳米过膜的性能,以实现高效的染料选和盐分离
Wanting Li1, Jiaye Liu2, Weifu Wang1
1Tianjin Key Laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, Tianjin 300384, China.
Membranes
|March 26, 2025
概括
这项研究开发了一种使用活性聚多巴胺和聚乙烯胺的新型纳米过膜,用于高效的染料和分离在织废水中. 新的膜显示出高稳定性和防腐性质,有助于资源回收.
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:
- 织废水处理需要高效的染料和盐分离,以回收资源.
- 现有的纳米过膜在平衡分离性能和稳定性方面面临着挑战.
研究的目的:
- 开发一种高性能纳米过膜,用于同时进行染料选和盐分离.
- 为了提高基于聚硫的纳米过膜的性能和稳定性.
主要方法:
- 活性聚多巴胺 (O-PDA) 和聚乙烯胺 (PEI) 在聚硫 (PSF) 支膜上同时沉积.
- 使用KMnO4氧化聚多巴胺,以创建交联结构.
- 过试验,以评估染料去除和盐保持能力.
主要成果:
- 通过O-PDA/PEI膜,NaCl的保留率从15%大幅增加到45.7%.
- 染料去除效率达到99.5%,证明了有效的染料选.
- 膜在长期测试中表现出卓越的运行稳定性和防腐性能.
结论:
- 开发的O-PDA/PEI纳米过膜显示了在织废水处理中有效的染料选和盐分离的巨大潜力.
- 通过控制O-PDA负载和氧化水平,可以调整膜的性能.
- 该研究强调了由于其稳定性和抗污染特性,膜适合于资源回收应用.
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