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• W3128735122 endingPage "129777" @default.
• W3128735122 startingPage "129777" @default.
• W3128735122 abstract "Per- and poly-fluoroalkyl substances (PFAS) represent a large family of anthropogenic organic compounds with a wide range of industrial and commercial applications. PFAS have become a global concern due to their toxicity and bio-accumulative properties. PFAS species have been ubiquitously detected in natural waters, wastewaters, sludge, and aquatic and terrestrial species which are anionic, zwitterionic and neutral. The ion exchange (IX) process for PFAS removal is an efficient technology for the remediation of PFAS-laden surface, ground and effluent wastewaters. This approach is more effective towards eliminating emerging short-chain PFAS which are not removed by carbon-based adsorption processes. This article presents a state-of-the-art review of PFAS removal from water via IX process. The evaluation and comparison of various IX resins in terms of kinetics and isotherms is presented. Literature data indicates that IX isotherm uptake capacity for perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) can range up to 5 mmol/g on commercially available IX resins such as IRA 958 and IRA 67. The mechanism involved in the PFAS uptake process, such as diffusion, electrostatic interactions and hydrophobic effects are discussed. The effects of the eluent variability on the regeneration efficacy are also highlighted and the effect of single-use vs reuse for newly developed PFAS-specific IX resins are also examined based on the reviewed literature. • Electrostatic and hydrophobic interactions play a key role in PFAS removal via IX. • Co-existing water constituents influence PFAS uptake efficacy. • Polystyrenic resins offer preferential removal of PFAS over NOM. • Alternatives to pseudo-second order model for PFAS-IX systems are warranted." @default.
• W3128735122 created "2021-02-15" @default.
• W3128735122 creator A5020573612 @default.
• W3128735122 creator A5029374022 @default.
• W3128735122 creator A5033849453 @default.
• W3128735122 creator A5046583307 @default.
• W3128735122 creator A5068695524 @default.
• W3128735122 date "2021-06-01" @default.
• W3128735122 modified "2023-10-17" @default.
• W3128735122 title "PFAS removal by ion exchange resins: A review" @default.
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