PFAS chemicals are known as "forever chemicals" because they last for years in the environment and our bodies. They are found in drinking water, food packaging, and even rainwater. This makes them a tough pollution problem.
Now, scientists might have found a way to break them down.
A New Way to Break Down PFAS
A new study shows that strong ultraviolet (UV) light can destroy PFAS without needing extra chemicals. Researchers found that hydrogen radicals are key to this reaction. These are highly reactive particles that form from water when exposed to UV light.
This discovery changes earlier ideas about how PFAS break down. Previous studies thought other reactive substances were mainly responsible. By finding that hydrogen radicals are the main factor, scientists now have a clearer idea of the chemical reactions involved.
We're a new kind of news feed.
Regular news is designed to drain you. We're a non-profit built to restore you. Every story we publish is scored for impact, progress, and hope.
Start Your News DetoxWhy This Discovery Matters
Knowing how PFAS break down can help scientists create better ways to treat them. Hydrogen radicals are very reactive. They can attack PFAS molecules and remove fluorine atoms. This weakens the compounds and breaks them into smaller, less harmful substances.
The study also found that this reaction works best with high-energy UV light, especially at wavelengths below 300 nanometers.
Associate Professor Zongsu Wei from Aarhus University led the study. He explained that PFAS are very stable because of their strong carbon-fluorine bonds. Breaking these bonds is the main challenge. He believes that identifying hydrogen radicals gives them a clearer path to design more effective and sustainable ways to destroy these chemicals, not just remove them.
Moving Beyond Filtering
Wei noted that many current methods only move PFAS from one place to another. They don't get rid of them completely. The real goal is to break the molecules down entirely. Understanding the process is crucial for doing this in a green and scalable way.
The researchers warn that this new finding is not an instant fix for PFAS pollution. The breakdown process is still slow, and new compounds can form during treatment. However, finding the main chemical driver is a big step forward. It helps us understand how these pollutants might eventually be destroyed more effectively.
The study suggests that even very stubborn contaminants can be defeated when scientists fully understand their chemistry.
Deep Dive & References
Mechanistic Insights into Per- and Polyalkyl Substance (PFAS) Photolysis under Intensified Simulated Solar Light - Environmental Science & Technology, 2026
