New method converts cheap plastic into valuable materials

Scientists have found a new way to break down common plastic using moisture in the air. This process can turn plastic waste into a valuable product, terephthalic acid (TPA), which is important for making polyesters. In just four hours, researchers were able to degrade 94% of a common type of plastic using a simple catalyst and air. This method is safer and cheaper than current recycling practices. Yosi Kratish, a researcher at Northwestern University, highlighted that only 5% of plastics are recycled in the U.S., while plastic waste continues to rise. Since 2000, over half of all plastic ever made has been produced. Experts warn that plastic production may double by 2050, with only 9% of plastics ever recycled. The remaining plastics can harm the environment and human health, breaking down into harmful microplastics. The team used a molybdenum catalyst and heated it with polyethylene terephthalate (PET), a common plastic type. They found that exposing this mixture to air transformed it into TPA and acetaldehyde, both valuable materials. The process effectively worked on mixed plastics without needing to sort them first. Moving forward, the researchers plan to adapt their method for industrial use. They believe this technology can help reduce plastic pollution and promote a circular economy, where materials are reused instead of wasted. This innovative approach could lead to a greener future and help address significant global challenges.