Issue 1, 2024

Superior single- and multi-component siloxane removal from water using a faulted silica DON zeolite adsorbent

Abstract

Removal of monomeric siloxanes from water via adsorption poses a significant challenge, particularly during water reclamation in closed-volume systems. In this study, both faulted and faultless variants UTD-1 pure silica zeolites with a DON-type framework were considered for the removal of monomethylsilanetriol (MMST), dimethylsilanediol (DMSD), and trimethylsilanol (TMS), in single- and multi-component fashion. The results showed that UTD-1faulted exhibited the largest adsorption capacity for TMS, with a maximum adsorption uptake of 73.1 mg g−1 in the 1 to 140 mg L−1 aqueous concentration range. This is 7× larger than UTD-1faultless and at least one magnitude larger than other materials such as activated carbon. The interaction of TMS with UTD-1faulted is mainly with OH groups from siloxy-related faults present in the material, and multicomponent adsorption tests showed that TMS helps to drive the uptake of other siloxanes via co-adsorption. UTD-1 is a promising material platform for developing adsorption-based strategies for removing persistent monomeric siloxanes from aqueous environments.

Graphical abstract: Superior single- and multi-component siloxane removal from water using a faulted silica DON zeolite adsorbent

Supplementary files

Article information

Article type
Paper
Submitted
14 Sept. 2023
Accepted
09 Nov. 2023
First published
10 Nov. 2023
This article is Open Access
Creative Commons BY license

Environ. Sci.: Adv., 2024,3, 10-18

Superior single- and multi-component siloxane removal from water using a faulted silica DON zeolite adsorbent

D. R. Vega-Santander, R. Arrieta-Pérez, D. Rivera-Mirabal, G. Del Valle-Pérez, M. Sepúlveda-Pagán, J. C. Muñoz-Senmache, Y. J. Pagán-Torres and A. J. Hernández-Maldonado, Environ. Sci.: Adv., 2024, 3, 10 DOI: 10.1039/D3VA00282A

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