Nano-Cage Filter Removes 98% of PFAS From Drinking Water, Including Short-Chain Compounds
denkstrom.orgAustralian researchers at Flinders University have developed a nano-cage filter that removes 98 percent of PFAS from drinking water in lab tests, including short-chain compounds that activated carbon filters miss. The material uses precisely shaped molecular cages embedded in porous silicon dioxide to trap PFAS by geometry rather than chemical reaction. The work appears in Angewandte Chemie International Edition and comes as new EU drinking water limits for PFAS took effect in January 2026. The filter addresses a known gap. Standard activated carbon removes 73 to 89 percent of long-chain PFAS and performs poorly on short-chain variants. The new material holds both, but three questions remain before it reaches water plants: whether production can scale to ton quantities, how to dispose of saturated filter media safely, and whether it holds up in real water conditions. Pilot tests in treatment facilities are planned, with practical maturity likely five to ten years away.