Novel β-cyclodextrin polymer adsorbents for removal of PFAS from diverse water matrices скачать в хорошем качестве

Novel β-cyclodextrin polymer adsorbents for removal of PFAS from diverse water matrices

Presented on April 28, 2021, by Yuhan Ling - Director of Environmental Engineering at CycloPure, Inc. - at the 2021 Emerging Contaminants in the Environment Conference Abstract: The prevalent occurrence of poly- and perfluoroalkyl substances (PFAS) has been reported in diverse water matrices, including groundwater, surface water, wastewater, and landfill leachate. The US EPA has established a combined health advisory limit for PFOA and PFOS at 70 ppt in drinking water, with states like Illinois adopting more restrictive PFAS standards. To address these restrictive standards, novel β-cyclodextrin polymer adsorbents (DEXSORB®) provide a renewable and cost-effective technology for PFAS removal, with the ability of regeneration for multiple cycles of reuse. This study investigated PFAS removal capabilities of DEXSORB® in a variety of water matrices under batch and packed-bed filtration (PBF) conditions. By benchmarking the performance of DEXSORB® against bituminous granular activated carbon (GAC), important advantages have been demonstrated for DEXSORB®, such as rapid kinetics, broad efficacy, high treatment capacity, and the resistance to matrix effects. In a recent pilot study, under PBF conditions with a 3.2-minute empty bed contact time (EBCT), DEXSORB® exhibited three times the treatment capacity for PFOA of GAC with a 10-minute EBCT. Importantly, DEXSORB® remains effective under the most challenging scenarios like landfill leachate, where traditional adsorbents like GAC cannot function. Download slides: http://hdl.handle.net/2142/109870