Gas-liquid interface enhanced selective adsorption of long-chain PFAS by novel floating macroporous resins

Gas-liquid interface enhanced selective adsorption of long-chain PFAS by novel floating macroporous resins | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Gas-liquid interface enhanced selective adsorption of long-chain PFAS by novel floating macroporous resins Shubo Deng, Xiangzhe Jiang, Yihua Luo, Wei Wang, Qianxin Zhang, and 3 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8285037/v1 This work is licensed under a CC BY 4.0 License Status: Posted Version 1 posted You are reading this latest preprint version Abstract Long-chain per- and polyfluoroalkyl substances (PFAS) in industrial wastewater are a significant source of PFAS contamination. Anion exchange resin (AER) adsorption is an advantageous technology for PFAS removal, but existing AERs suffer from limited selectivity. Here, our synthesized novel macroporous AERs with asymmetric long-chain amine groups, MP-(12-1-1) and MP-(16-1-1), exhibited a unique floating behavior on the water surface after drying and achieved significantly enhanced PFAS removal from chromium-plating wastewater, with the gas-liquid interface playing a critical role. Molecular dynamics simulations revealed that the rough surfaces and hydrophobic functional groups of the dry MP-(12-1-1) and MP-(16-1-1) enable them to maintain the Cassie wetting state in water without transitioning to the Wenzel state, thereby forming a stable gas-liquid interface. The gas-liquid interface exhibited adsorption free energies reached − 7.6 to − 9.5 kcal/mol for long-chain PFAS, increasing the selectivity of the floating macroporous AERs for various long-chain PFAS by 6–81 times. This provides a new approach for the efficient removal of long-chain PFAS and offers new insights for the design of selective adsorbents based on the gas-liquid interface. Earth and environmental sciences/Environmental sciences/Environmental chemistry/Pollution remediation Physical sciences/Chemistry/Environmental chemistry/Pollution remediation Full Text Additional Declarations There is NO Competing Interest. Supplementary Files Supplementaryinformation20251205.docx Supplementary information Cite Share Download PDF Status: Posted Version 1 posted You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. As a division of Research Square Company, we’re committed to making research communication faster, fairer, and more useful. We do this by developing innovative software and high quality services for the global research community. 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Anion exchange resin (AER) adsorption is an advantageous technology for PFAS removal, but existing AERs suffer from limited selectivity. Here, our synthesized novel macroporous AERs with asymmetric long-chain amine groups, MP-(12-1-1) and MP-(16-1-1), exhibited a unique floating behavior on the water surface after drying and achieved significantly enhanced PFAS removal from chromium-plating wastewater, with the gas-liquid interface playing a critical role. Molecular dynamics simulations revealed that the rough surfaces and hydrophobic functional groups of the dry MP-(12-1-1) and MP-(16-1-1) enable them to maintain the Cassie wetting state in water without transitioning to the Wenzel state, thereby forming a stable gas-liquid interface. 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