Performance prediction of flat sheet commercial nanofiltration membrane using Donnan-Steric Pore Model

Danial Qadir; Rizwan Nasir; Hilmi Mukhtar; Fahim Uddin

doi:10.12989/MWT.2021.12.2.059

Performance prediction of flat sheet commercial nanofiltration membrane using Donnan-Steric Pore Model

Danial Qadir, Rizwan Nasir, Hilmi Mukhtar, Fahim Uddin

Research output: Contribution to journal › Article › peer-review

Abstract

The rejection of sodium chloride (NaCl) and calcium chloride (CaCl2) single salt solutions were carried out for commercial nanofiltration NFDK membrane. Results showed that the NFDK membrane had a negative surface charge and had a higher observed rejection of 93.65% for calcium (Ca2+) ion and 78.27% for sodium (Na+) ions. Prediction of rejection for aqueous solutions of both salts was made using Donnan Steric Pore Model based on Extended Nernst-Planck Equation in addition to concentration polarization film theory. A MATLAB program was developed to execute the model calculations. Absolute Average Relative Error (% AARE) was found below 5% for real rejection of the NFDK membrane. This research could be used successfully to assess the membrane characterization parameter using a proposed procedure which can reduce the number of experiments.

Original language	English
Pages (from-to)	59-64
Number of pages	6
Journal	Membrane and Water Treatment
Volume	12
Issue number	2
DOIs	https://doi.org/10.12989/MWT.2021.12.2.059
Publication status	Published - 1 Mar 2021
Externally published	Yes

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© 2021 Techno-Press, Ltd.

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AU - Mukhtar, Hilmi

AU - Uddin, Fahim

PY - 2021/3/1

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AB - The rejection of sodium chloride (NaCl) and calcium chloride (CaCl2) single salt solutions were carried out for commercial nanofiltration NFDK membrane. Results showed that the NFDK membrane had a negative surface charge and had a higher observed rejection of 93.65% for calcium (Ca2+) ion and 78.27% for sodium (Na+) ions. Prediction of rejection for aqueous solutions of both salts was made using Donnan Steric Pore Model based on Extended Nernst-Planck Equation in addition to concentration polarization film theory. A MATLAB program was developed to execute the model calculations. Absolute Average Relative Error (% AARE) was found below 5% for real rejection of the NFDK membrane. This research could be used successfully to assess the membrane characterization parameter using a proposed procedure which can reduce the number of experiments.

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Performance prediction of flat sheet commercial nanofiltration membrane using Donnan-Steric Pore Model

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