Removal of perfluoroalkyl and polyfluoroalkyl substances in water and water/soil slurry using Fe0 -modified reactive activated carbon conjugated with persulfate
© 2021 Water Environment Federation.
| Veröffentlicht in: | Water environment research : a research publication of the Water Environment Federation. - 1998. - 94(2022), 1 vom: 07. Jan., Seite e1671 |
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| Weitere Verfasser: | , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2022
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| Zugriff auf das übergeordnete Werk: | Water environment research : a research publication of the Water Environment Federation |
| Schlagworte: | Journal Article complex media granular activated carbon perfluoroalkyl and polyfluoroalkyl substances persulfate zerovalent iron Fluorocarbons Soil Water Pollutants, Chemical Water mehr... |
| Zusammenfassung: | © 2021 Water Environment Federation. Treatment of highly persistent perfluoroalkyl and polyfluoroalkyl substances (PFAS) has been a challenging but significant task. Herein, we propose adsorption-mediated chemical decomposition of PFAS implemented by using granular activated carbon (GAC) impregnated with zerovalent nanoiron (ZVI, Fe0 ), so-called reactive activated carbon (RAC). The effects of reaction temperature, injection of persulfate (PS), and presence of soil on removal of PFAS in water were evaluated. Results showed that RAC conjugated with PS at 60°C exhibited decomposition of PFAS, exclusively all three carboxylic PFAS tested, obviously producing various identifiable short-chain PFAS. Carboxylic PFAS were removed via physical adsorption combined with chemical decomposition while sulfonic PFAS were removed via solely adsorption mechanism. The presence of soil particles did not greatly affect the overall removal of PFAS. Carbon mass balance suggested that chemical oxidation by radical mechanisms mutually influences, in a complex manner, PFAS adsorption to GAC, ZVI and its iron derivatives, and soil particles. Nonetheless, all tested six PFAS were removed significantly. If successfully developed, the adsorption-mediated decomposition strategy may work for treatment of complex media containing PFAS and co-contaminants under different environmental settings. PRACTITIONERS POINTS: Treatment of persistent per- and polyfluoroalkyl substances (PFAS) was addressed. Activated carbon with zerovalent iron was examined in the presence of persulfate. The system significantly removed and decomposed PFAS in water and soil mixture |
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| Beschreibung: | Date Completed 12.01.2022 Date Revised 12.01.2022 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1554-7531 |
| DOI: | 10.1002/wer.1671 |