Highly Selective Removal of Perfluorinated Contaminants by Adsorption on All‐Silica Zeolite Beta

Matthias van den Bergh (1) , Andraž Krajnc (2) , Stefan Voorspoels (3) , Sérgio Rodrigues Tavares (4) , Steven Mullens (3) , Isabelle Beurroies (5) , Guillaume Maurin (4) , Gregor Mali (2) , Dirk de Vos (1)

1 Centre for Surface Chemistry and Catalysis
2 KI - National Institute of Chemistry [Llubljana]
3 VITO - Flemish Institute for Technological Research
4 ICGM - Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier
5 MADIREL - Matériaux divisés, interfaces, réactivité, électrochimie

Perfluorinated alkylated substances (PFASs) are widely used in industrial and commercial applications, leading to a widespread occurrence of these persistent and harmful contaminants in our environment. Removal of these compounds from surface and waste waters is being mandated by European and U.S. governments. Currently, there are no treatment techniques available that lower the concentrations of these compounds for large water bodies in a cost- and energy-efficient way. We hereby propose a hydrophobic, all-silica zeolite Beta material that is a highly selective and high-capacity adsorbent for PFASs, even in the presence of organic competitors. Advanced characterization data demonstrate that the adsorption process is driven by a very negative adsorption enthalpy and favorable steric factors.

Mots clés: adsorption; computational chemistry; NMR spectroscopy; perfluorinated compounds; zeolites

Domaines: Chimie; Matériaux

Matthias van den Bergh, Andraž Krajnc, Stefan Voorspoels, Sérgio Rodrigues Tavares, Steven Mullens, et al.. Highly Selective Removal of Perfluorinated Contaminants by Adsorption on All‐Silica Zeolite Beta. Angewandte Chemie International Edition, 2020, 59 (33), pp.14086-14090. ⟨10.1002/anie.202002953⟩. ⟨hal-02900058⟩