Water contamination caused by chemicals used in modern technology is an escalating global issue. A recent study by the U.S. Centers for Disease Control found that 98% of people tested had detectable levels of PFAS—long-lasting “forever chemicals”—in their bloodstream. However, a new natural filtration material developed by MIT researchers may offer a solution. Made from silk and cellulose, this innovative filter can remove a range of persistent contaminants, including PFAS and heavy metals, while also boasting antimicrobial properties that prevent filter fouling.
The findings, published in ACS Nano, were led by MIT postdoc Yilin Zhang, civil and environmental engineering professor Benedetto Marelli, and their team. The material’s creation originated from Marelli’s lab, which initially sought to combat counterfeit seeds through silk nanofibrils. Zhang suggested the material’s potential for water filtration, leading to the addition of cellulose to the silk structure, enhancing its performance. This hybrid material has shown promise in lab tests, significantly outperforming traditional filters like activated carbon.
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