Calibrating and Validating the MFI-UF Method to Measure Particulate Fouling in Reverse Osmosis

Mohanad Abunada, Nirajan Dhakal, William Z. Andyar, Yuke Li, Pamela Ajok, NorEddine Ghaffour, Jan C. Schippers, Maria D. Kennedy

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


This study aimed to calibrate and validate the MFI-UF method in order to ensure the accuracy of particulate fouling measurements in RO. Firstly, the MFI-UF calibration was examined using two solutions of standard particles (dextran and polystyrene). Two main criteria were investigated: (i) MFI-UF linearity with particle concentrations at both low and high ranges of fouling potential and (ii) the reproducibility of MFI-UF linearity. Dextran solutions showed a strong MFI-UF linearity over the entire range of measured MFI-UF. However, the linearity was not reproducible, and different batches of dextran prepared under the same conditions produced very variable results. For polystyrene solutions, the MFI-UF linearity was verified at the higher range of MFI-UF (>10,000 s/L2), while the MFI-UF at the lower range (
Original languageEnglish (US)
Pages (from-to)535
Issue number5
StatePublished - May 22 2023

Bibliographical note

KAUST Repository Item: Exported on 2023-05-25
Acknowledgements: This research received no external funding.

ASJC Scopus subject areas

  • General Materials Science


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