Rapid and Efficient Removal of Perfluorooctanoic Acid from Water with Fluorine-Rich Calixarene-Based Porous Polymers.

On account of its non-biodegradable nature and persistence in the environment, perfluorooctanoic acid (PFOA) accumu-lates in water resources and poses serious environmental issues in many parts of the world. Here, we present the develop-ment of two fluorine-rich calix[4]arene-based porous polymers, FCX4-P and FCX4-BP, and demonstrate their utility for the efficient removal of PFOA from water. These materials featured BET surface areas of up to 450 m2 g-1, which is slightly lower than their non-fluorinated counterparts (up to 596 m2 g-1). FCX4-P removes PFOA at environmentally relevant con-centrations with a high rate constant of 3.80 g mg-1 h-1 and reaches an exceptional maximum PFOA uptake capacity of 188.7 mg g-1. In addition, it can be regenerated by simple methanol wash and reused without a significant decrease in per-formance.

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