Removal of Perfluoroalkyl Substances (PFAS) from Water Using Tailored and Highly Porous Organosilica Adsorbents

Edmiston, Paul

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https://hdl.handle.net/2142/106647 Copy

Description

Title

Removal of Perfluoroalkyl Substances (PFAS) from Water Using Tailored and Highly Porous Organosilica Adsorbents

Author(s)

Edmiston, Paul

Issue Date

2019-03-07

Keyword(s)

• PFAS
• 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.

Series/Report Name or Number

Sustainable Seminar Series

Type of Resource

• text
• still image

Language

en

Permalink

• https://youtu.be/qIdxrT_v7u0
• http://hdl.handle.net/2142/106647

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