Question - Per- and polyfluoroalkyl substances (PFAS) are a group of man-made chemicals that includes PFOA, PFOS, GenX, and many other chemicals. PFAS have been manufactured and used in a variety of industries around the globe, including in the United States since the 1940s. What are the various ways that PFAS may be removed from drinking water?
Answer- “EPA has found ways to remove PFAS from drinking water. These effective technologies are as follows: 1-Granular Activated Carbon (GAC) – Chemicals like PFAS stick to the small pieces of carbon as the water passes through. 2-Powdered Activated Carbon (PAC) – The carbon is powdered and is added to the water. The chemicals then stick to the powdered carbon as the water passes through. 3-Ion Exchange Resins –Small beads (called resins) are made of hydrocarbons that work like magnets. The chemicals stick to the beads and are removed as the water passes through. 4-Nanofiltration and reverse osmosis –A process where water is pushed through a membrane with small pores. The membrane acts like a wall that can stop chemicals and particles from passing into drinking water.” (https://www.epa.gov/pfas/treating-pfas-drinking-water; accessed April 2019)