Complete aqueous defluorination of PFAS in aqueous film-forming foam (AFFF) by pulsed electrolysis with tailored potential modulation

RSC Advances, Journal Year: 2025, Volume and Issue: 15(11), P. 8287 - 8292

Published: Jan. 1, 2025

We demonstrate complete photo-assisted electrocatalytic defluorination of PFAS in AFFF using nonprecious materials. High-salt LiOH electrolyte prevents foaming, and pulsed electrolysis with tailored potential modulation optimizes defluorination.

Language: Английский

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Sensitive Multichannel ¹⁹F Magnetic Resonance Imaging Enabled by Paramagnetic Fluorinated Ionic Liquid-Based Probes

ACS Nano, Journal Year: 2025, Volume and Issue: 19(9), P. 9061 - 9069

Published: March 1, 2025

Owing to its negligible biological background and high magnetic resonance sensitivity, 19F imaging (MRI) has emerged as a competitive complement for 1H MRI, which is already widely used in biomedical research clinical practice. The performance of MRI greatly reliant on probes, the development poses considerable demands sources. Fluorinated ionic liquids (FILs) have recently attracted increasing attention alternative sources because their good aqueous solubility, ease chemical modification, fluorine contents. However, FIL-based probes significantly restricted by unfavorable relaxation times. Herein, we developed strategy modulate times (including both T1 T2) FILs exploiting paramagnetic enhancement effect Mn2+ ions promote capacity. three including EMIMBF4, BMIMOTf, BMIMPF6 are appropriately tuned with at optimized concentrations, resulting significant signal over 5-fold. We further utilized liposils encapsulate these construct enables fast clear illustrated series vivo experiments. Moreover, made probe containing all concentration, whose capacity multiplexed also validated Our study demonstrates promising potential "hot spot" more importantly, feasibility modulation construction high-performance probes.

Language: Английский

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Investigating the Structure–Function Relationships of Fluorinated Interfaces for PFAS Capture and Electrochemically‐Mediated Release

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 29, 2025

Abstract Fluorinated materials are promising sorbents for the selective removal of per‐ and polyfluoroalkyl substances (PFAS) due to their unique fluorophilic interactions. However, there gaps in understanding design principles toward fluorinated optimized PFAS remediation. In this work, we vary length side‐chains copolymer‐functionalized electrodes study effect on electrochemically‐mediated capture release. Molecular dynamics simulations adsorption experiments reveal that binding is governed by total amount interactions rather than side‐chain. Moreover, side‐chain alters polymer packing porosity, which turn affects Simulations short‐chain percolate into pores matrix, while long‐chain aggregate surface, facilitating a faster desorption. Experiments show desorption enhanced upon applying potential, regenerating over 80% electrode providing reversible mechanism release PFAS. Additionally, copolymer demosntrate selectivity between PFAS, achieving separation factors >190 perfluorooctanoic acid (PFOA, 7 C–F) perfluorobutanoic (PFBA, 3 C–F). This provides insights functional electrochemical separations.

Language: Английский

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Comment on “Experimentally Determined Aqueous Diffusion Coefficients of PFAS Using ¹⁹F NMR Diffusion-Ordered Spectroscopy”

ACS ES&T Water, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 10, 2024

Language: Английский

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