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Edminston's slidesPDF


video/mp420190307 Remova ... rganosilica Adsorbents.mp4 (56MB)
Video recording of Paul Edmiston's seminar on March 7, 2019MPEG-4 video


Title:Removal of Perfluoroalkyl Substances (PFAS) from Water Using Tailored and Highly Porous Organosilica Adsorbents
Author(s):Edmiston, Paul
per- and polyfluoroalkyl substances
water treatment
porous organosilicas
Abstract:Paul Edmiston - Theron and Dorothy Peterson Professor of Chemistry and Analytical Chemist at The College of Wooster (Ohio). Porous organosilicas with specific surface chemistries were developed as adsorbents for the selective removal of either perfluoroalkyl surfactants (PFASs) from water. Swellable organically modified silica (SOMS) materials were created that incorporated cationic and fluoroalkyl groups with the hypothesis that intermolecular interactions specific to PFASs would improve adsorption affinity and capacity. SOMS materials are useful in adsorbent design since they possess: i) the ability to swell to creates a continuous mesoporous structure, ii) a surface chemistry that can be tailored through synthesis or incorporation of polymer coatings to the pores, and iii) chemical stability to allow for regeneration in place. Adsorption kinetics, adsorption isotherms, and column breakthrough experiments were used to measure performance for a range of PFASs with variable chain length and chemical identity (PFDA, PFNA, PFOA, PFHpA, PFHxA, PFOeA, PFBA, PFOSA, PFxHs, PFOSA, and PFOSaAm). Organosilica materials show promise for allowing rational design of adsorbents used for remediation of PFAS impacted water. Adsorption mechanisms unique to SOMS will be presented in the context of treatment of wide range of water solutes for those with general interest in water purification technology.
Issue Date:2019-03-07
Series/Report:Sustainable Seminar Series
Genre:Presentation / Lecture / Speech
Date Available in IDEALS:2020-03-27

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