Adsorption of perfluorocarboxylic acids at the silica surface | Health & Environmental Research Online (HERO)

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Citation
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HERO ID

3981901

Reference Type

Journal Article

Title

Adsorption of perfluorocarboxylic acids at the silica surface

Author(s)

Shafique, U; Dorn, V; Paschke, A; Schüürmann, G

Year

2017

Is Peer Reviewed?

Yes

Journal

Chemical Communications
ISSN: 1359-7345
EISSN: 1364-548X

Volume

Issue

Page Numbers

589-592

Language

English

PMID

27981321

DOI

10.1039/c6cc07525h

Web of Science Id

WOS:000391954000023

Abstract

Water molecules may force the hydrophobic perfluoroalkyl chain of perfluorocarboxylic acids (PFCAs) to aggregate at hydrophobic siloxane patches ([triple bond, length as m-dash]Si-O-Si[triple bond, length as m-dash]) of the silica surface despite electrostatic repulsion between surface silanol ([triple bond, length as m-dash]SiO(-)) and the carboxylate (-COO(-)) headgroup of PFCA. Acidic pH and background cations promote the adsorption further by reducing the anion-anion Coulomb repulsion.

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