Most PFAS treatment today traps "forever chemicals" rather than destroying them. A team led by researchers at Arizona State University reports a palladium-coated membrane that, in a lab test, captured six PFAS and chemically broke them down at the same time, according to an ASU News release dated October 19, 2026. The study appears in the Proceedings of the National Academy of Sciences (PNAS).

We are the water experts. Here is what the team reports, and what it does and doesn't mean for the water in your glass.

What the researchers built

Breaking the bond. PFAS owe their persistence to the carbon-fluorine bond. "It's called the strongest bond in organic chemistry," said Bruce Rittmann, director of ASU's Biodesign Swette Center for Environmental Biotechnology, who led the study.
Hydrogen plus palladium. The researchers coated tiny membrane fibers with palladium nanoparticles and fed hydrogen gas through them, ASU says. The palladium turns the hydrogen into a highly reactive form that can strip fluorine from PFAS molecules attached to the same surface.
Inside-out delivery. Rather than mixing hydrogen into the water, the system feeds it from inside the membrane directly to the palladium layer, which ASU calls one of the study's key advances.
Six PFAS tested. The method was tested on six PFAS of regulatory concern. "We showed that this mechanism worked for all six," Rittmann said. "It's a universal mechanism."

The results

For nearly two months, a 58-day run, the system continuously treated water containing a mixture of the six PFAS, according to ASU. It reduced each compound by more than 90% and stripped away about 83% of the fluorine overall, which ASU says shows the chemicals were being broken apart rather than only filtered out.

Why "destroy" matters

Activated carbon, ion exchange and membrane filtration can capture PFAS, but the chemicals stay in spent filters, brines or concentrated waste that still has to be handled or disposed of, ASU notes. The team says the new membrane could eventually complement those systems: conventional treatment would first concentrate PFAS from large volumes of water into a smaller waste stream, and the catalytic membrane would then break them down.

Read the results carefully

Lab scale, not a product. Translating the method into practical water treatment will require further engineering, according to ASU.
Cost is a hurdle. "Palladium is expensive," Rittmann said. "It's around $50,000 a kilogram." Reducing the amount of palladium needed is one of the group's top research priorities, ASU says.
Six compounds, one mixture. The reported results cover the six PFAS tested; thousands of PFAS exist, and ASU notes that only a small fraction have been thoroughly tested for toxicity.
Collaborators. The work was done with researchers from Rice University, Tongji University, the National University of Singapore and Nanjing University, according to ASU.

What the water experts recommend

Know what's in your water now. Lab advances take years to reach treatment plants. Check your utility's latest water quality report, or test a private well for PFAS with a certified lab.
Ask where the PFAS go. If you use a home filter that captures PFAS, follow the maker's replacement schedule, since the captured chemicals stay in the spent cartridge.
Weighing your drinking-water options? Treatment like this works on water after PFAS are already in it. Atmospheric water generation, which we call vapor optimizing (VO), makes drinking water from humidity in the air instead of from ground or surface water. It uses electricity, and energy is the honest trade-off to weigh.

Sources

ASU News, "A new way to fight 'forever chemicals'" (ASU researchers develop technique that can capture and destroy ubiquitous PFAS, instead of just filtering them out), October 19, 2026: news.asu.edu
The study, Proceedings of the National Academy of Sciences: doi.org/10.1073/pnas.2613985123

Photo: The Biodesign Institute at Arizona State University, Tempe, by Sweeden17 via Wikimedia Commons (CC BY-SA 3.0); cropped, headline added in the featured image. Illustrative.