Effect of highly concentrated salt on retention of organic solutes by nanofiltration polymeric membranes
作者： Jianquan Luo , Yinhua Wan
DOI: 10.1016/J.MEMSCI.2011.01.066
关键词:
摘要: During desalination of feed with highly concentrated salt by nanofiltration (NF), predictive modeling was difficult due to the effect on retention organic solutes. Consequently, a better understanding membrane and solutes required. In this study, four well-known commercially available NF polymeric membranes, NF270, NF-, Desal-5 DL Nanomax50, were analyzed model based an extended Nernst-Planck equation, using glucose sodium chloride (NaCl) solutions. The results showed that increasing concentration, solute-to-pore size ratio (lambda(i)) decreased while effective thickness porosity (Delta x/epsilon) increased, indicating may include decreasing size, pore thickness. Moreover, such appeared be independent solute types, correction could well predict charged at high concentration because electrostatic repulsion between membranes completely screened ions. Meanwhile, several hypotheses as swelling, hydration layer thinning particle collision provided explain change parameters salt. (C) 2011 Elsevier B.V. All rights reserved.
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