在纳米过和反透膜中盐的度影响盐的透性
A Lachheb1, A El Attar1,2, F Z Addar1
1Laboratory of Advanced Materials and Process Engineering, Faculty of Sciences, Ibn Tofail University, Kenitra, 1246, Morocco.
ChemistryOpen
|November 14, 2025
概括
使用纳米过 (NF) 和反透 (RO) 膜的水淡化对于缺水地区至关重要. 这项研究表明,度的增加如何影响膜性能,NF270提供高流量但更低的排斥,而NF90和TM710的性能类似.
科学领域:
- 水处理技术水处理技术.
- 膜科学与工程 膜科学与工程
- 环境化学环境化学
背景情况:
- 摩洛哥因人口增长,经济扩张和气候变化而面临严重的水资源挑战.
- 使用低压纳米过 (NF) 和反透 (RO) 膜的水淡化是一种可行的解决方案.
- 了解盐度对膜性能的影响对于优化海水淡化过程至关重要.
研究的目的:
- 评估不同盐度水平 (2,4和6g/L) 对NF和RO膜性能的影响.
- 使用斯皮格勒-凯德姆和凯德姆-卡查尔斯基模型分析离子转移机制.
- 检查盐度如何影响扩散流量,对流引起的度,反射系数和溶液透性.
主要方法:
- 测试两个纳米过 (NF270,NF90) 和一个反透膜 (TM710).
- 使用3个半合成盐水样本,控制盐度.
- 应用斯皮格勒-凯德姆 (SK) 和凯德姆-卡查尔斯基 (KK) 模型进行离子运输分析.
主要成果:
- 所有膜的透流量随着料水盐度的增加而线性减少.
- NF270膜显示了最高的透流量,而TM710实现了最高的总溶解固体 (TDS) 排斥.
- NF270表现出更大的对流传输,扩散和对流流量随盐度增加而增加;TM710主要依赖于扩散.
结论:
- NF90和TM710膜表现出类似的性能和离子输送特性,NF90表现得像RO膜一样.
- 随着盐度的增加,NF270的保留效率下降,导致溶液透性更高.
- 对于淡水淡化膜的选择,必须考虑流量,排放和操作盐度之间的权衡.
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