A group of bacteria has proved adept at destroying the ultratough carbon-fluorine bonds that give “forever chemicals” their name. This fin

Enlisting Microbes to Break Down ‘Forever Chemicals’

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2024-11-15 03:00:07

A group of bacteria has proved adept at destroying the ultratough carbon-fluorine bonds that give “forever chemicals” their name. This finding boosts hopes that microbes might someday help remove these notoriously pervasive pollutants from the environment.

Nearly 15,000 chemicals commonly found in everyday consumer products such as pizza boxes, rain jackets and sunscreens are recognized as perfluoroalkyl and polyfluoroalkyl substances, or PFASs. These chemicals can enter the body via drinking water or sludge-fertilized crops, and they have already infiltrated the blood of almost every person in the U.S. Scientists have linked even low levels of chronic PFAS exposure to myriad health effects such as kidney cancer, thyroid disease and ulcerative colitis.

Current methods to destroy PFASs require extreme heat or pressure, and they work safely only on filtered-out waste. Researchers have long wondered whether bacteria could break down the chemicals in natural environments, providing a cheaper and more scalable approach. But carbon-­fluorine bonds occur mainly in humanmade materials, and PFASs have not existed long enough for bacteria to have specifically evolved the ability to digest them. The new study—though not the first to identify a microbe that destroys carbon-fluorine bonds—provides a step forward, says William Dichtel, a chemist at Northwestern University who studies energy-efficient ways to chemically degrade PFASs.

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