Kyoto –
A Japanese research group has developed a new method to break down PFAS, a group of organic fluorine compounds often called “forever chemicals” for their persistence in the environment.
The group of Ritsumeikan University researchers succeeded in completely breaking down perfluorooctane sulfonate (PFOS), a type of PFAS, within hours by using nanometer-scale semiconductor crystals as catalysts and applying light from a purple light-emitting diode. A nanometer is one-billionth of a meter.
PFAS, or perfluoroalkyl and polyfluoroalkyl substances, have been used in a wide range of products, such as fire extinguishing agents and coated nonstick cookware, because they have strong water and oil repellent properties.