Pfas, Microplastics And What Comes Next For North Carolina’s Water

By Will Atwater

In North Carolina, debates complete really to modulate emerging h2o contaminants are moving from nan laboratory to nan argumentation arena — and this week, those debates could construe into binding policy. The North Carolina Environmental Management Commission, which sets statewide h2o value standards, is scheduled to meet Jan. 7-8 and is expected to finalize rules that limit nan discharge of PFAS and different pollutants into authorities waterways.

Per- and polyfluoroalkyl substances dress up a people of 15,000 synthetic compounds often called “forever chemicals” because of their persistence successful nan situation and guidance to breaking down. Used for decades successful products for illustration nonstick cookware, nutrient packaging and stain-resistant fabrics, PFAS person been linked to immune suppression, developmental harm and definite cancers.

An emerging contaminant, microplastics, integrative particles smaller than 5 millimeters — astir nan size of a pencil eraser — and moreover smaller nanoplastics are now considered ubiquitous successful nan environment. In nan past fewer years, scientists person progressively been capable to observe these particles successful water, nutrient and quality tissue, including organs specified arsenic nan liver, kidneys and brain, raising caller questions astir really plastics move done nan body.

Previously, PFAS and microplastics were studied arsenic abstracted contaminants. But newer investigation suggests that real-world vulnerability seldom occurs that way. Studies progressively show nan 2 pollutants co-exist successful water, nutrient and nan environment, wherever microplastics whitethorn transportation aliases interact pinch different chemicals, and some tin persist successful surviving tissue. This realization has prompted calls for a much integrated attack to assessing biology and quality wellness risks.

Microplastic debris collected from nan environment. Researchers progressively find that microplastics and PFAS co-exist successful h2o and food, wherever plastics tin carrier different chemicals and persist successful surviving tissue. Credit: ATSDR/CDC

As North Carolina and nan federation brace for an progressive twelvemonth of argumentation debates and caller investigation connected PFAS and microplastics, Frank Leibfarth, a UNC Chapel Hill chemistry professor and nan university’s first recipient of nan Blavatnik National Award for Young Scientists, is moving astatine nan intersection of some challenges. Leibfarth’s investigation focuses connected designing advanced polymer materials and chemic processes to seizure and destruct PFAS successful drinking water, while besides processing safer, much sustainable plastics aimed astatine reducing semipermanent biology contamination.

In 2024, Leibfarth and Orlando Coronell, a UNC Chapel Hill biology sciences and engineering professor, helped motorboat aviator testing of caller materials designed to region PFAS from nationalist drinking h2o and wastewater systems arsenic portion of nan North Carolina PFAS University Research Alliance. The activity was funded by nan North Carolina Collaboratory, a General Assembly inaugural that coordinates investigation crossed nan UNC System to support authorities and section authorities decision-making.

In precocious 2025, NC Health News said pinch Leibfarth astir what nan latest subject reveals astir PFAS and microplastics — and what questions researchers are still trying to answer.

North Carolina Health News: Can you stock an update connected nan PFAS aviator testing?

Frank Leibfarth: We completed 3 aviator tests. One progressive aboveground h2o from nan Cape Fear River, which we conducted astatine [Cape Fear Public Utility Authority] Sweeney Water Treatment Plant. Another focused connected groundwater drawn from nan Pee Dee Aquifer and was carried retired astatine [CFPUA’s] Richardson Drinking Water Treatment Plant successful Wilmington. The 3rd took spot astatine a wastewater installation — nan Burlington Wastewater Treatment Plant. We besides conducted aviator testing pinch Orange Water and Sewer Authority successful Chapel Hill.

Leibfarth told NCHN that successful summation to section pilots, his squad is moving pinch respective utilities connected bench-scale tests to measure really nan materials execute nether different curen conditions.

NCHN: Beyond studying nan liquids produced by landfills (called leachate), what different goals do you person for 2026?

Leibfarth: With nan accusation that we’ve learned from nan pilots and nan feedback we’ve gotten from nan utilities, we want to commencement astatine slightest 2 much pilots successful bid to lick circumstantial problems that they’ve asked america to solve. Those are things for illustration expanding nan capacity of our resins for agelong concatenation PFAS, and implementing an on-site regeneration process that could beryllium utilized by utilities successful nan future.

NCHN: Many h2o utilities already trust connected granular activated c systems to region PFAS. What are nan challenges successful adding caller curen technologies without rebuilding full systems?

Leibfarth: In 2026, we want to aviator ion speech resins that are denser and could beryllium utilized successful operation pinch carbon. Most aboveground h2o plants, for illustration Sweeney, will apt usage c because it makes economical sense. For utilities to adopt different technology, it has to fresh into that existing infrastructure. No municipal curen works wants to show customers they request a full caller building to make it work.

NCHN: One situation utilities look is what happens to PFAS aft filters are cleaned. How does that process activity for granular activated carbon?

Leibfarth: For granular activated c filters, they nonstop them to what are called reactivate facilities. That’s a thermal curen process that reactivates a granular activated c truthful it tin beryllium utilized again.The accusation for really efficaciously [the process] destroys PFAS is still not known because nan information isn’t released. That reactivation isn’t 100 percent, so, typically, they person to adhd immoderate caller granular activated c successful bid to bring nan capacity up to what it was.  

NCHN: Let’s displacement to integrative waste. In a caller Duke University study put a value tag connected nan societal costs of integrative contamination arsenic overmuch arsenic $1 trillion yearly. What do you deliberation astir single-use plastics successful that context?

Leibfarth: There’s a study comparing java cups [that states that] complete its lifetime, a porcelain mug tin make much greenhouse state emissions than hundreds of disposable polystyrene cups, mostly because porcelain is energy-intensive to manufacture and wash. I’m afloat connected committee pinch reducing really overmuch integrative we make — and location are immense opportunities to recycle and reuse it amended — but plastics besides do a tremendous magnitude to prevention energy.

NCHN: But overmuch of that polystyrene still ends up discarded successful nan environment. How do you reconcile that?

Leibfarth: We creation materials for nan astir utmost usage case. Think astir a nutrient motortruck — packaging is designed for personification who mightiness thrust 30 miles and want nan nutrient still hot. But astir group locomotion up and eat correct there. Do we really request each that excess material? A batch of this comes down to really we deliberation astir utilizing things, not conscionable nan worldly itself.

Large, analyzable problems for illustration integrative contamination and ambiance alteration tin beryllium difficult for group to grasp astatine an individual level, Leibfarth noted. Studies that quantify biology impacts, he said, thief show really mundane choices — multiplied crossed millions of group — tin adhd up to important harm, moreover arsenic he cautioned against simplistic narratives that framework each plastics arsenic inherently bad.

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