A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Removal of Poly- and Perfluoroalkyl Substances from Natural and Wastewater by Tailored Silica-Based Adsorbents
https://orcid.org/0000-0002-8353-8089
https://orcid.org/0000-0003-2112-9308
https://orcid.org/0000-0002-2765-8625
https://orcid.org/0000-0002-5430-6764
https://orcid.org/0000-0003-0072-6082
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.
Due to an increasing number of fires in the world, related to the continued exploitation of fossil fuels and other causes, there is a threat of groundwater contamination with large amounts of fluorine-containing compounds from the fire extinguishing agents. Our research is aimed at removing both high and low concentrations of PFAS from the environment in order to decrease the risk of adverse impact of PFAS on the environment and human health.
Removal of Poly- and Perfluoroalkyl Substances from Natural and Wastewater by Tailored Silica-Based Adsorbents
https://orcid.org/0000-0002-8353-8089
https://orcid.org/0000-0003-2112-9308
https://orcid.org/0000-0002-2765-8625
https://orcid.org/0000-0002-5430-6764
https://orcid.org/0000-0003-0072-6082
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.
Due to an increasing number of fires in the world, related to the continued exploitation of fossil fuels and other causes, there is a threat of groundwater contamination with large amounts of fluorine-containing compounds from the fire extinguishing agents. Our research is aimed at removing both high and low concentrations of PFAS from the environment in order to decrease the risk of adverse impact of PFAS on the environment and human health.
Removal of Poly- and Perfluoroalkyl Substances from Natural and Wastewater by Tailored Silica-Based Adsorbents
https://orcid.org/0000-0002-8353-8089
https://orcid.org/0000-0003-2112-9308
https://orcid.org/0000-0002-2765-8625
https://orcid.org/0000-0002-5430-6764
https://orcid.org/0000-0003-0072-6082
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.
Due to an increasing number of fires in the world, related to the continued exploitation of fossil fuels and other causes, there is a threat of groundwater contamination with large amounts of fluorine-containing compounds from the fire extinguishing agents. Our research is aimed at removing both high and low concentrations of PFAS from the environment in order to decrease the risk of adverse impact of PFAS on the environment and human health.
Removal of Poly- and Perfluoroalkyl Substances from Natural and Wastewater by Tailored Silica-Based Adsorbents
Dudarko, Oksana (author) / Budnyak, Tetyana (author) / Tkachenko, Oleg (author) / Agback, Tatiana (author) / Agback, Peter (author) / Bonnet, Björn (author) / Ahrens, Lutz (author) / Daniel, Geoffrey (author) / Seisenbaeva, Gulaim (author)
ACS ES&T Water ; 4 ; 1303-1314
2024-04-12
Article (Journal)
Electronic Resource
English
PFAS , PFOA , SBA-15 , water treatment , sorption
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