表面活性剂诱导的湿化动态在膜蒸超盐淡化环境中的膜蒸
Joel Parayil Jacob1, Raju Kumar Gupta1,2,3,4,5
1Department of Chemical Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India. guptark@iitk.ac.in.
Nanoscale horizons
|December 2, 2025
概括
高度的盐加快了膜蒸 (MD) 中的膜湿,影响了效率. 了解盐和表面活性剂的相互作用对于优化MD淡化和减少液体排放至关重要.
科学领域:
- 盐分淡化技术 盐分淡化技术
- 膜科学 膜科学 膜科学
- 环境工程 环境工程
背景情况:
- 膜蒸 (MD) 为海水淡化提供了一个有希望的解决方案,特别是对于高盐料,通过改善淡水回收和减少液体排放.
- 表面活性剂使膜孔湿透,大大降低了MD分离效率,因为它破坏了必要的空气间隙.
- 现有的模型表明,湿化动力学仅取决于表面活性剂度和蒸汽流量.
研究的目的:
- 调查盐和表面活性剂度对MD中的膜湿化动态的独立影响.
- 为了确定不同的盐度如何影响表面活性剂诱导的湿,即使在低水平的表面活性剂.
- 开发一个预测框架的膜湿制度考虑离子强度和表面活性剂的活动.
主要方法:
- 检查不同度的盐 (NaCl) 和表面活性剂 (二硫酸) 对疏水膜的脱效应.
- 在低盐条件下测试表面活性剂度超过临界度 (CMC).
- 开发一个包含离子强度和表面活性剂活性的数学框架,以建模湿.
主要成果:
- 高盐度 (1.2M NaCl以上) 显著加快了膜湿,可能使MD不适合这样的料.
- 在低盐度下,疏水性PVDF膜表现稳定,即使表面活性剂度高于CMC.
- 提出了一个数学框架,以基于离子强度和表面活性剂活性来预测不同的膜湿模式.
结论:
- 盐度是影响MD中表面活性剂诱导的湿化动态的关键因素,与表面活性剂度一起.
- 准确预测表面活性剂诱导的湿需要将散装表面活性剂和盐度结合起来.
- 结果表明表面活性剂诱导湿化的替代机制,增强目前的理解,并可能使更强大的MD操作.
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