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Volume 15, Issue 1
  • ISSN: 2210-6812
  • E-ISSN: 2210-6820

Abstract

Purpose

This study aimed to characterize commercial nanofiltration membranes (NF90 and NP010) by determining their membrane parameters and estimating osmotic pressure using the virial equation.

Methods

A comparison has been conducted using the Van't Hoff equation for both dilute and concentrated mixtures. Membrane parameters (σ, Ps, and ks) have been experimentally obtained, and osmotic pressure has been calculated using the virial equation, with results compared to the Van't Hoff equation. Various solutes, including lactose, Al3+, Mg2+, Na+, and Cl-, have been tested at different concentrations to investigate the membrane behavior.

Results

The virial equation has shown better agreement with experimentally measured fluxes than the Van't Hoff equation. With an increase in solute concentration, σ has decreased, while Ps and ks have increased. Higher cation valency has increased rejection rates, with lactose exhibiting the highest rejection. The rejection rates have followed the order of ＞ ＞ ＞ ＞ . The order of σ values has been as follows: ＞ ＞ ＞ ＞ . While the order of Ps and ks values has been Cl->Na+>Mg2+>Al3+>lactose.

Conclusion

The virial equation has proven to be more effective in estimating osmotic pressure. The findings have provided valuable insights into membrane behavior under varying conditions, optimizing the application of NF membranes across various industries.

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2024-12-06
2025-07-07

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/content/journals/nanoasi/10.2174/0122106812345894241119090151
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Advanced Modeling and Comparative Analysis of Nanofiltration Membrane Parameters: NF90 vs. NP010
Nanoscience & Nanotechnology-Asia 15, E22106812345894 (2025); https://doi.org/10.2174/0122106812345894241119090151
/content/journals/nanoasi/10.2174/0122106812345894241119090151
/content/journals/nanoasi/10.2174/0122106812345894241119090151
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  • Article Type:     Research Article
Keyword(s): Mass transfer coefficient; membrane technology; nanofiltration membranes; solute permeability; Van't Hoff equation; volumetric flux

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