The Pentagon has made tackling the risks of PFAS contamination at military bases and surrounding communities a top priority.
Testing is still at a small scale, but U.S. Navy researchers are encouraged by their work to develop new firefighting foams that do not contain the"forever chemicals" known as PFAS, that at high levels have been linked to increased health risks, including cancer.
Over time, the PFAS in the foam enters the groundwater surrounding some military bases, which affects drinking water. For the past two years, Ananth and other researchers have been working with silicon as a potential replacement for PFAS in the foams. Current foams, known formally as AAAF aqueous film-forming foams, work by covering a burning liquid's film layer preventing fuel vapors from continuing to fuel the fire."Past efforts have really focused on the film-forming aspect of AAAF," Katherine Hinnant, an NRL chemical engineer, told ABC News."We think that the foam plays a bigger role in this process. So we're choosing to focus on the foam layer and not just the film layer.
In that test, a six-foot-wide pool of fuel was set ablaze so a trained firefighter could spray the new foam to see whether it could extinguish the fire.Researchers have partnered with universities to study if there are any long-term environmental or health impacts from the use of silicon in the new foams.
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