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New filtration material could remove long-lasting chemicals from water Membranes based on natural silk and cellulose can remove many contaminants, including “forever chemicals” and heavy metals.
A filter developed at MIT might provide a nature-based solution to PFAS water contamination. Made from natural silk and cellulose, the material can remove many of these “forever chemicals” as well as heavy metals, and its antimicrobial properties can help keep the filters from fouling.
A recent study by the U.S. Centers for Disease Control found that 98 percent of people tested had detectable levels of PFAS, a family of particularly long-lasting compounds also known as “forever chemicals,” in their bloodstream. The U.S. Environmental Protection Agency has estimated that PFAS remediation will cost $1.5 billion per year, in order to meet new regulations that call for limiting the compound to less than 7 parts per trillion in drinking water. The initial technology that made the filtration material possible was developed by his group for a completely unrelated purpose — as a way to make a labelling system to counter the spread of counterfeit seeds, which are often of inferior quality.
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