Combined Nanofiltration and Thermocatalysis for the Simultaneous Degradation of Micropollutants, Fouling Mitigation and Water Purification

• Main Authors: Katarzyna Janowska, Xianzheng Ma, Vittorio Boffa, Mads Koustrup Jørgensen, Victor M. Candelario
• Format: Article
• Language: English
• Published: MDPI AG 2021-08-01
• Series: Membranes
• Subjects: nanofiltration; thermocatalysis; perovskite; micropollutants; water purification; wastewater
• Online Access: https://www.mdpi.com/2077-0375/11/8/639

Due to progressive limitation of access to clean drinkable water, it is nowadays a priority to find an effective method of water purification from those emerging organic contaminants, which might have potentially harmful and irreversible effects on living organisms and environment. This manuscript reports the development of a new strategy for water purification, which combines a novel and recently developed Al₂O₃-doped silica nanofiltration membrane with a thermocatalytic perovskite, namely cerium-doped strontium ferrate (CSF). The thermocatalytic activity of CSF offers the opportunity to degrade organic pollutants with no light and without input of chemical oxidants, providing simplicity of operation. Moreover, our studies on real samples of secondary effluent from wastewater treatment showed that the thermocatalyst has the ability to degrade also part of the non-toxic organic matter, which allows for reducing the chemical oxygen demand of the retentate and mitigating membrane fouling during filtration. Therefore, the new technology is effective in the production of clean feed and permeate and has a potential to be used in degradation of micropollutants in water treatment.