New Bio-Based Membrane Captures 94% of PFAS in Polluted Water

A new bio-based polymer membrane could help tackle PFAS contamination in water. Developed by researchers at the University of Bath, the material removes over 94% of harmful PFOA from polluted supplies. Its design focuses on sustainability, offering a reusable solution to a persistent environmental problem. The membrane is crafted from ultra-fine polymer fibres sourced from renewable materials. When exposed to water, its nanoscale structure absorbs moisture and reorganises, effectively trapping PFAS molecules. Tests show it captures roughly half of the pollutant load within the first hour.

Unlike traditional methods that destroy contaminants, this approach prioritises capture and reuse. The membrane can be heated to release trapped PFAS, allowing up to 93% of its original adsorption capacity to be restored. Researchers are now transitioning from lab trials to real-world testing. PFAS pollution remains a global challenge, with thousands of these chemicals detected in soils and waterways worldwide. Current remediation techniques struggle to scale effectively, making innovative solutions like this membrane critical. If successful, the technology could lead to a new generation of water treatment materials that balance performance with circularity.

The University of Bath's membrane offers a promising step in PFAS removal, combining efficiency with reusability. As testing expands beyond the lab, its potential to address large-scale contamination could provide a much-needed tool for cleaner water systems. The focus on sustainability also sets it apart from conventional treatment methods.