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February 2, 2026Environmental Science & Technology

Dynamic Monitoring of Reverse Osmosis Process via Electrical Impedance Tomography: Enabling In Situ Visualization and Uncovering Distinct Roles of Concentration Polarization/Foulant Deposition in Flux Decline

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Authors

FGFei GaoJZJianrui ZhouHJHui Jia

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Overview

Demonstrates in situ visualization of fouling in reverse osmosis, suggesting enhanced mitigation strategies.

Key Points

  • The aim is to develop a noninvasive method for monitoring fouling in reverse osmosis membranes using electrical impedance tomography.
  • Developed a membrane imaging platform based on electrical impedance tomography (EIT) for in situ monitoring.
  • Monitored concentration polarization and fouling layer formation during reverse osmosis filtration.
  • Utilized time-series impedance data for machine learning analysis to predict flux changes.
  • Concentration polarization reaches equilibrium within minutes of filtration.
  • Fouling is identified as the primary cause of continuous flux decline during filtration.
  • Increased salt concentration influences concentration polarization and scaling processes.
  • Organic matter presence accelerates membrane fouling.
  • A machine learning-based random forest model was created for predicting flux changes.

Cite This Study

Gao et al. (2026) studied this question.

synapsesocial.com/papers/6980ff26c1c9540dea811ec7https://doi.org/10.1021/acs.est.5c15320
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