Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Unlocking the Potential of Chemically Modified Carbon Gels in Gallic Acid Adsorption

Version 1 : Received: 24 January 2024 / Approved: 25 January 2024 / Online: 25 January 2024 (10:09:50 CET)

A peer-reviewed article of this Preprint also exists.

Carvalho, R.C.; Durán-Valle, C.J.; Adame-Pereira, M. Unlocking the Potential of Chemically Modified Carbon Gels in Gallic Acid Adsorption. Gels 2024, 10, 123. Carvalho, R.C.; Durán-Valle, C.J.; Adame-Pereira, M. Unlocking the Potential of Chemically Modified Carbon Gels in Gallic Acid Adsorption. Gels 2024, 10, 123.

Abstract

This study deals with the preparation of adsorbents from a commercial xerogel by chemically modifying its surface with concentrated mineral acids and alkali metal chlorides, their physicochemical characterization, and their use as adsorbents for gallic acid in aqueous solution. The prepared adsorbents have a high specific surface area (347-563 m2 g-1), better pore development for samples treated with alkali metal chlorides than with mineral acids and are more acidic than the initial xerogel (p.z.c range 2.49-6.87 vs. 7.20). The adsorption properties of the commercial xerogel improved over a wide range of pH and temperature. The experimental results indicate that the adsorption process is thermodynamically favored.

Keywords

carbon xerogel; water remediation; adsorption; gallic acid.

Subject

Chemistry and Materials Science, Surfaces, Coatings and Films

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