Removal of perfluoroalkyl acids and common drinking water contaminants by weak-base anion exchange resins: Impacts of solution pH and resin properties

ABSTRACT: Highlights • Weak-base (WB) and strong-base (SB) anion exchange resins (AERs) studied for pH.• At acidic and neutral pH, similar contaminant removal by WB and SB AERs.• Contaminant selectivity of WB AER due to polymer composition.• Electrostatic interactions are diminished for WB AER at alkaline pH.• Aqueous alkaline solution has great potential for regeneration of WB AER. The underlying chemistry of weak-base (WB) anion exchange resins (AERs) for contaminant removal from water is not well documented in the literature. To address this, batch adsorption experiments were conducted at pH 4, 7, and 10 using two representative WB-AERs (polyacrylic IRA67 and polystyrene IRA96) and two representative strong-base (SB) AERs (polyacrylic IRA458 and polystyrene A520E), of differing polymer compositio

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PROVIDER: S-EPMC9650071 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature