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

Ling, Yuhan

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https://hdl.handle.net/2142/109870 Copy

Description

Title

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

Author(s)

Ling, Yuhan

Issue Date

2021-04-28

Keyword(s)

• per- and polyfluoroalkyl substances
• PFAS
• remediation

Abstract

Presented by: Yuhan Ling – Director of Environmental Engineering at CycloPure, Inc., yling@cyclopure.com Co-authors: Shubhada M Khanvilkar, Shan Li, Edon Vitaku, Matthew J. Notter 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. Biography: Dr. Yuhan Ling is Director of Environmental Engineering at Cyclopure. He leads the application of DEXSORB® in engineered treatment systems, and managed the company’s participation in the Orange County Water District PFAS pilot. He is expert in RSSCT protocol design. Prior to joining Cyclopure, Dr. Ling earned his Ph.D. in Environmental Engineering at Cornell University. His research focused on the study of DEXSORB adsorbents for the treatment of emerging contaminants such as pharmaceuticals, pesticides, and industrial chemicals like PFAS.

Series/Report Name or Number

2021 Emerging Contaminants in the Environment Conference (ECEC21)

Type of Resource

• text
• still image

Language

en

Permalink

• http://hdl.handle.net/2142/109870
• https://youtu.be/xtIXPq-MeP0

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