Scientists have discovered that a soil microbe commonly found in New Jersey wetlands can break down one of the toughest class of pollutants, known as per- and polyfluoroalkyl substances, or PFAS.
Scientists have discovered that a soil microbe commonly found in New Jersey wetlands can break down one of the toughest class of pollutants, known as per- and polyfluoroalkyl substances, or PFAS. Often referred to as “forever chemicals,” PFAS are found in household products from non-stick pans, to dental floss, to water-repellant fabric.
These pollutants are extremely long-lasting and difficult to clean up, and can be found extensively in U.S. waterways and soil. They also move through the food chain, accumulating in humans at levels that scientists say can cause adverse health effects, including higher cholesterol levels, cancer, thyroid disruption, and low infant birth weights. The problem has gotten so widespread that the U.S. Environmental Protection Agency recently started a research initiative into the pollutants’ impact on drinking water.
The reason PFAS are so difficult to get rid of is because of their carbon-fluorine covalent bonds, one of the strongest in organic chemistry. Scientists Shan Huang and Peter Jaffe at Princeton University had been studying a process known as Feammox in which ammonium breaks down in acidic, iron-rich soils in New Jersey wetlands and similar locations. They found that this reaction occurred in the presence of the bacterium Acidimicrobium A6, and when they sequenced the microbe’s genome, they found that it held certain characteristics that could help break carbon-fluorine bonds, and therefore break down PFAS.
Read more at Yale Environment 360
Image: In lab tests, a relatively common soil bacterium has shown it can break down the difficult-to-remove class of pollutants called PFAS. DAVID KELLY CROW
