Scientists at Rice University have developed a new filtration technology that absorbs so-called “forever chemicals” (PFAS) 100 times faster than existing methods. This discovery could prove to be a breakthrough in the fight against environmental pollution, as researchers have also found an effective way to completely destroy these toxic substances.
What are PFAS and why are they dangerous?
PFAS is a chemical class consisting of more than 16,000 compounds widely used for product water resistance and heat stability. They are called “forever chemicals” because they do not break down naturally and accumulate in the environment and the human body.
Their link to serious diseases has been scientifically proven, including:
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Cancer and kidney disease;
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Liver problems and immune disorders;
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Birth defects.
PFAS are everywhere in our daily lives—from frying pans and waterproof clothing to cosmetics and fast-food packaging. These chemicals provide durability and protect items from water and grease.
However, this very durability is the main problem. PFAS are not biodegradable. When these items end up in landfills, rain carries them into the soil, from where they enter groundwater and pollute the environment.
How does the new technology work and what does it change?
Rice University scientists have created a special material (LDH) composed of copper and aluminum. Its principle of operation is simple: the filter is positively charged, while the “forever chemicals” (PFAS) are negatively charged. A strong electrostatic attraction is formed between them. As a result, this device absorbs and collects toxic substances 100 times faster than other filters.
The main advantage of this method is the complete destruction of the chemicals. Until now, existing methods only collected PFAS. With the new technology, the collected chemicals are heated at low temperatures, which ultimately breaks the bonds between them. This results in a safe residue (calcium fluoride), which is as harmless as ordinary sand.
From an economic perspective, this discovery is very practical because it can be integrated into existing water treatment systems. According to the scientists, this method significantly reduces costs.
However, the main challenge now is scaling this technology from the laboratory to large plants. This involves complex regulations and safety standards.
