Chemical engineers at the University of Florida have developed a new PFAS filter that removes harmful “forever chemicals” from water more effectively than many existing commercial filtration materials.
The innovation could offer a safer and more sustainable approach to tackling one of the world’s most persistent water contamination challenges.
The research focuses on removing per- and polyfluoroalkyl substances (PFAS), a group of synthetic chemicals widely used in industrial processes and consumer products.
These compounds are notoriously difficult to eliminate because they persist in the environment and have been associated with health concerns, including certain cancers and developmental problems.
Published in the journal Energy and Environmental Materials, the study demonstrates that the newly developed gel-based material captures one of the most common PFAS compounds while avoiding the use of fluorinated materials within the filter itself.
The team is now working to refine the technology for potential use in municipal and commercial water treatment systems.
Gel-based PFAS filter improves contaminant capture
Unlike many traditional filtration materials that rely on surface adsorption, the new PFAS filter allows contaminants to bind throughout the entire structure of the gel. This significantly increases the amount of PFAS the material can capture before requiring regeneration.
The material has been specifically engineered to attract perfluorooctanoic acid (PFOA), one of the most frequently detected PFAS compounds in contaminated water supplies.
Carefully designed electrical charges within the gel act like molecular attachment points, drawing in and holding the pollutant more efficiently than many conventional alternatives.
Another practical advantage is that the filter can be reused. Once saturated, the trapped contaminants can be removed using common solvents, allowing the gel to be regenerated for multiple filtration cycles.
Eliminating fluorinated materials from the filtration process
A major objective of the research was to create a filtration material that does not itself contain fluorinated compounds.
Many current PFAS removal technologies depend on fluorinated materials that could potentially degrade over time and introduce additional fluorinated substances into the environment.
By removing fluorine from the filter design while maintaining strong contaminant removal performance, the researchers believe they have demonstrated a more environmentally responsible approach to water treatment.
Building future PFAS treatment technologies
The research team views the new PFAS filter as more than a single product. The adaptable polymer platform allows scientists to modify its chemistry and study how different molecular structures interact with a wide range of PFAS compounds.
This broader understanding could lead to new design principles for future filtration technologies capable of removing PFAS chemicals that remain challenging for today’s commercial treatment systems.
As testing continues, the technology could contribute to safer drinking water and more effective long-term management of persistent chemical pollution.
