An international team of environmental engineers, chemists and catalysis experts have debuted a bold new roadmap for harnessing heterogeneous catalysis to destroy PFAS chemicals.
In a study published in Nature Water, the team assessed current catalytic technologies for PFAS destruction, proposed a suite of innovations to overcome existing limitations and emphasized the urgent need for holistic performance metrics that reflect true environmental and public health benefits.
One of the team’s key recommendations is a pretreatment step to simplify the complex soup of PFAS often found in industrial waste or contaminated groundwater. Using known homogeneous chemical reactions, they postulate that these mixtures can be transformed into a smaller set of better-understood compounds, paving the way for more effective catalytic destruction.
The researchers also proposed a sequential “treatment train,” where simplified PFAS mixtures are processed through tailored catalytic steps. This approach ensures that even complex PFAS mixtures can be effectively destroyed rather than just absorbed onto a solid, requiring additional treatment.
The team also introduced a new energy metric called electrical energy per order of defluorination (EEOD) to fairly compare how efficiently different catalytic systems break fluorine-carbon bonds. Unlike traditional removal metrics, EEOD focuses on true degradation, not just separation.
The study concludes with a call for interdisciplinary collaboration and open data sharing to refine PFAS treatment strategies, with the need for scalable, cost-effective destruction methods greater than ever.
“Catalysis offers a promising path to completely break down PFAS molecules, but current approaches are still far from optimal,” said Michael Wong, co-author and chair of the Department of Chemical and Biomolecular Engineering at Rice. “We need smarter design, better process integration and a more nuanced way of comparing technologies that accounts for energy, cost and toxicity reduction.”
Information provided by Rice University