Magnetic beta cyclodextrin molecularly imprinted polymer for selective extraction of perfluorooctanoic acid from water
Summary: The association of PFOA with low concentrations and complex water matrices has made its direct quantification using sensitive analytical methods such as UHPLC-ESI-MS/MS challenging. This study used a magnetic beta-cyclodextrin-based molecularly imprinted polymer (TWAC-Fe3O4@β-CD-MIP) prepar...
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Elsevier
2025-08-01
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| Series: | iScience |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S258900422501466X |
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| author | Nompumelelo Malatji Anele Mpupa Boris Mizaikoff Philiswa Nosizo Nomngongo |
| author_facet | Nompumelelo Malatji Anele Mpupa Boris Mizaikoff Philiswa Nosizo Nomngongo |
| author_sort | Nompumelelo Malatji |
| collection | DOAJ |
| description | Summary: The association of PFOA with low concentrations and complex water matrices has made its direct quantification using sensitive analytical methods such as UHPLC-ESI-MS/MS challenging. This study used a magnetic beta-cyclodextrin-based molecularly imprinted polymer (TWAC-Fe3O4@β-CD-MIP) prepared via surface imprinting on magnetic tea waste activated carbon (TWAC-Fe3O4). Under optimal conditions, the method exhibited a linear range (17–5000 ng/L, R2 = 0.9990) in real water, with LOD and LOQ of 8.6 ng/L and 29 ng/L, respectively. Precision was high, with intraday and interday %RSD of 2.1% and 3.7%. The adsorbent was reusable for three cycles while maintaining over 60% recovery. Spike recoveries in water samples ranged from 102 to 106% with %RSD <5%, confirming the method’s accuracy. The imprinting factor was 5.57, and adsorption followed the Sips isotherm model. This study explored MIPs for PFOA determination in water. |
| format | Article |
| id | doaj-art-cbd111fcb2da4cd3b7364be2ebc64ea5 |
| institution | DOAJ |
| issn | 2589-0042 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | iScience |
| spelling | doaj-art-cbd111fcb2da4cd3b7364be2ebc64ea52025-08-20T02:57:22ZengElsevieriScience2589-00422025-08-0128811320510.1016/j.isci.2025.113205Magnetic beta cyclodextrin molecularly imprinted polymer for selective extraction of perfluorooctanoic acid from waterNompumelelo Malatji0Anele Mpupa1Boris Mizaikoff2Philiswa Nosizo Nomngongo3Department of Chemical Sciences, University of Johannesburg, Doornfontein Campus, PO Box 17011, 2028 Doornfontein, South Africa; Department of Science and Innovation-National Research Foundation South African Research Chair Initiative (DSI-NRF SARChI) in Nanotechnology for Water, University of Johannesburg, 2028 Doornfontein, South AfricaAgricultural Research Council-Vegetable, Industrial and Medicinal Plants (ARC-VIMP), Roodeplaat, 0001 Pretoria, South AfricaDepartment of Chemical Sciences, University of Johannesburg, Doornfontein Campus, PO Box 17011, 2028 Doornfontein, South Africa; Institute of Analytical and Bioanalytical Chemistry, Ulm University, 89081 Ulm, Germany; Hahn-Schickard, 89077 Ulm, GermanyDepartment of Chemical Sciences, University of Johannesburg, Doornfontein Campus, PO Box 17011, 2028 Doornfontein, South Africa; Department of Science and Innovation-National Research Foundation South African Research Chair Initiative (DSI-NRF SARChI) in Nanotechnology for Water, University of Johannesburg, 2028 Doornfontein, South Africa; Corresponding authorSummary: The association of PFOA with low concentrations and complex water matrices has made its direct quantification using sensitive analytical methods such as UHPLC-ESI-MS/MS challenging. This study used a magnetic beta-cyclodextrin-based molecularly imprinted polymer (TWAC-Fe3O4@β-CD-MIP) prepared via surface imprinting on magnetic tea waste activated carbon (TWAC-Fe3O4). Under optimal conditions, the method exhibited a linear range (17–5000 ng/L, R2 = 0.9990) in real water, with LOD and LOQ of 8.6 ng/L and 29 ng/L, respectively. Precision was high, with intraday and interday %RSD of 2.1% and 3.7%. The adsorbent was reusable for three cycles while maintaining over 60% recovery. Spike recoveries in water samples ranged from 102 to 106% with %RSD <5%, confirming the method’s accuracy. The imprinting factor was 5.57, and adsorption followed the Sips isotherm model. This study explored MIPs for PFOA determination in water.http://www.sciencedirect.com/science/article/pii/S258900422501466XChemistryEnvironmental technologyMaterials scienceMolecular imprinted techniqueNanomaterials |
| spellingShingle | Nompumelelo Malatji Anele Mpupa Boris Mizaikoff Philiswa Nosizo Nomngongo Magnetic beta cyclodextrin molecularly imprinted polymer for selective extraction of perfluorooctanoic acid from water iScience Chemistry Environmental technology Materials science Molecular imprinted technique Nanomaterials |
| title | Magnetic beta cyclodextrin molecularly imprinted polymer for selective extraction of perfluorooctanoic acid from water |
| title_full | Magnetic beta cyclodextrin molecularly imprinted polymer for selective extraction of perfluorooctanoic acid from water |
| title_fullStr | Magnetic beta cyclodextrin molecularly imprinted polymer for selective extraction of perfluorooctanoic acid from water |
| title_full_unstemmed | Magnetic beta cyclodextrin molecularly imprinted polymer for selective extraction of perfluorooctanoic acid from water |
| title_short | Magnetic beta cyclodextrin molecularly imprinted polymer for selective extraction of perfluorooctanoic acid from water |
| title_sort | magnetic beta cyclodextrin molecularly imprinted polymer for selective extraction of perfluorooctanoic acid from water |
| topic | Chemistry Environmental technology Materials science Molecular imprinted technique Nanomaterials |
| url | http://www.sciencedirect.com/science/article/pii/S258900422501466X |
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