Reduction of a Tetrafluoroterephthalonitrile‐β‐Cyclodextrin Polymer to Remove Anionic Micropollutants and Perfluorinated Alkyl Substances from Water

Abstract

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Efficient PFAS Removal by Amine-Functionalized Sorbents: Critical Review of the Current Literature

“…48−51 However, the conversion of the nitrile groups in TFN-CDP to primary amines reversed its surface charge and PFAS affinity, and as a result, the cationic amine-TFN-CDP removed 10 anionic PFAS, including shortchain derivatives, at environmentally relevant concentrations. 51 PFAS adsorption studies on quaternary amine-functionalized ion exchange resins also illustrate the value of amine groups for PFAS sorption. Ray et al, 52 for instance, compared PFOA and PFOS adsorption on negatively charged montmorillonite clay with that of positively charged montmorillonite clay, which is f u n c t i o n a l i z e d w i t h q u a t e r n a r y a m i n e p o l y -(diallyldimethylammonium) chloride (PDADMAC) polymer or pyridine-containing poly(4-vinylpyridine-co-styrene) (PVPcoS) polymer.…”

Organic pollutants in water-soluble cavitands and capsules: contortions of molecules in nanospace

“…2,3 In this context, novel strategies based on supramolecular host-guest recognition have attracted increased attention in recent years. [4][5][6][7] Some supramolecular hosts that function in watercyclodextrins, [8][9][10][11][12] calixarenes, 13,14 calix [4]pyrroles 15 and pillararenes [16][17][18][19] have been used for scavenging organic micropollutants by attaching them to insoluble covalent polymer networks. These show promising results in terms of efficiency and binding selectivity.…”

Ionic Fluorogels for Remediation of Per- and Polyfluorinated Alkyl Substances from Water.

“…Lastly, IF-30+ performed impressively for removing the short chain perfluorinated carboxylic acids PFBA (60%) and PFPeA (87%), which contain only 3 and 4 perfluorocarbons, respectively (Figure 4). 27,28,32 In conclusion, we introduce Ionic Fluorogels as a platform polymeric adsorbent to remove PFAS from water at environmentally relevant concentrations. The synergistic combination of fluorous and electrostatic interactions results in the high affinity, high capacity, and rapid sorption of a variety of PFAS from real water collected at an affected site in the Cape Fear River Watershed of North Carolina.…”

“…21 Furthermore, the binding affinities of organic contaminants to GAC is often higher than those of PFAS, which can result in PFAS leaching into filtered water over time. 21,22 Emerging technologies include porous organic polymer adsorbents [23][24][25][26][27][28][29][30] and ion exchange materials that contain a fluorinated component. [31][32][33][34] While these materials show great promise for adsorbing long-chain PFAS, they are still at an early stage of development, have generally not been tested in real water, and display modest selectivity for short-chain PFAS.…”