PFAS chemicals have polluted rivers, lakes, and even our drinking water. Millions of people are exposed to these long‑lasting pollutants.
Scientists Find a New Way to Grab PFAS
Researchers at Flinders University built a special material that acts like a tiny trap for PFAS. The lead scientist, Dr. Witold Bloch, called it a "nano‑cage" because it is only a few atoms wide.
This cage works especially well with short‑chain PFAS, which are the hardest to catch with current filters.
How the Nano‑Cage Works
The team placed the nano‑cages inside a sponge‑like substance called mesoporous silica. By themselves, silica does not hold PFAS, but the cages give it a strong grip.
Inside the cage, PFAS molecules are forced to gather together. This creates a very tight bond, much stronger than the bonds formed by ordinary adsorbents.
Impressive Results
Lab tests showed the new material could pull out up to 98% of PFAS from water that mimics real tap water. The filter also worked many times – it stayed strong after at least five cleaning cycles.
These findings suggest the nano‑cage could be added to existing water‑treatment plants to give a final polish to drinking water.
Why PFAS Matter
PFAS are used in many products, from non‑stick cookware to firefighting foam. Over time they seep into the environment, raising worries about health effects for people, animals, and wildlife.
The study was supported by several Australian Research Council grants and used advanced equipment at the Australian Synchrotron and other research facilities.