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Removal of Poly- an...
Removal of Poly- and Perfluoroalkyl Substances from Natural and Wastewater by Tailored Silica-Based Adsorbents
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Dudarko, Oksana (author)
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- Budnyak, Tetyana (author)
- Uppsala universitet,Nanoteknologi och funktionella material
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- Tkachenko, Oleg (author)
- Uppsala universitet,Nanoteknologi och funktionella material
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Agback, Tatiana (author)
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Agback, Peter (author)
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Bonnet, Björn (author)
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Ahrens, Lutz (author)
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Daniel, Geoffrey (author)
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Seisenbaeva, Gulaim (author)
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(creator_code:org_t)
- American Chemical Society, 2024
- 2024
- English.
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In: ACS ES&T Water. - : American Chemical Society.
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Per- and polyfluoroalkyl substances (PFAS) are very stable and ubiquitously distributed in terrestrial and aquatic environments, and treatment and remediation techniques for the removal of PFAS are urgently needed. In this study, mesoporous silica matrix SBA-15 grafted with alkyl amino groups was used to remove perfluorooctanoate (PFOA) from aqueous solutions. The amino groups were grafted onto SBA-15 by the condensation of alkyl amino silanes. The synthesized adsorbents were studied by SEM, TEM, IR, low-temperature nitrogen sorption, and XRD. The solid-state and liquid 19F NMR spectroscopy, EDX, and LC-MS/MS results showed high adsorption efficiency and rapid reaction kinetics. In freshly prepared solutions and on the surface of the sorbents, the presence of PFOA micelles was observed. Furthermore, the introduction of amine-containing groups into the structure of the sorbent allows the sorption of up to 649 mg/g of PFOA from solutions. Results showed that the protonated surface amino groups and PFOA interacted electrostatically. The obtained results open perspectives for producing adsorbents for facile extraction of PFAS.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)
Keyword
- Engineering Science with specialization in Nanotechnology and Functional Materials
- Teknisk fysik med inriktning mot nanoteknologi och funktionella material
Publication and Content Type
- ref (subject category)
- art (subject category)
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