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Membrane Water Treatment Volume 12, Number 2, March 2021 , pages 059-64 DOI: https://doi.org/10.12989/mwt.2021.12.2.059 |
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Performance prediction of flat sheet commercial nanofiltration membrane using Donnan-Steric Pore Model |
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Danial Qadir, Rizwan Nasir, Hilmi Mukhtar and Fahim Uddin
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| 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. | ||
| Key Words | ||
| donnan-steric partitioning model; flat sheet; nanofiltration; Nernst Planck equation; real rejection | ||
| Address | ||
| Danial Qadir and Hilmi Mukhtar: Department of Chemical Engineering, University Teknologi PETRONAS, Sri Iskandar, 32610, Perak, Malaysia Rizwan Nasir: Department of Chemical Engineering, University of Jeddah, Asfan Road, 23890, Jeddah, Saudi Arabia Fahim Uddin: Department of Chemical Engineering, NED University of Engineering and Technology, University Road, 75270, Karachi, Pakistan | ||
