Aluminum-Loaded Bifunctional Resins for Efficient Fluoride Removal from Aqueous Solutions

The deep defluorination of water remains a significant environmental challenge. In this work, aluminum was loaded onto the bifunctional resin S957 containing a phosphoric-sulfonic acid difunctional group for efficient fluoride removal. Al-S957 demonstrated excellent fluoride removal performance acro...

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Main Authors: Mengfei Ma, Yingpeng Gu, Ruijie Wang, Yue Sun
Format: Article
Language:English
Published: MDPI AG 2025-07-01
Series:Applied Sciences
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Online Access:https://www.mdpi.com/2076-3417/15/14/7829
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author Mengfei Ma
Yingpeng Gu
Ruijie Wang
Yue Sun
author_facet Mengfei Ma
Yingpeng Gu
Ruijie Wang
Yue Sun
author_sort Mengfei Ma
collection DOAJ
description The deep defluorination of water remains a significant environmental challenge. In this work, aluminum was loaded onto the bifunctional resin S957 containing a phosphoric-sulfonic acid difunctional group for efficient fluoride removal. Al-S957 demonstrated excellent fluoride removal performance across a broad pH range. When anions and organics coexisted, Al-S957 exhibited significantly better fluoride adsorption performance compared to aluminum-loaded monofunctional resins. The adsorption followed an endothermic chemisorption process on a monolayer surface. FTIR and XPS analyses further revealed that fluoride removal relied on a ligand exchange mechanism. Column adsorption conducted over five cycles highlighted the strong practical potential of Al-S957. The results suggested that Al-S957 exhibits significant potential for practical applications.
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institution Kabale University
issn 2076-3417
language English
publishDate 2025-07-01
publisher MDPI AG
record_format Article
series Applied Sciences
spelling doaj-art-57dd06614b124faf92e4fbe8c6a8a9c22025-08-20T03:35:36ZengMDPI AGApplied Sciences2076-34172025-07-011514782910.3390/app15147829Aluminum-Loaded Bifunctional Resins for Efficient Fluoride Removal from Aqueous SolutionsMengfei Ma0Yingpeng Gu1Ruijie Wang2Yue Sun3Department of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, ChinaDepartment of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, ChinaDepartment of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, ChinaDepartment of Municipal Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, ChinaThe deep defluorination of water remains a significant environmental challenge. In this work, aluminum was loaded onto the bifunctional resin S957 containing a phosphoric-sulfonic acid difunctional group for efficient fluoride removal. Al-S957 demonstrated excellent fluoride removal performance across a broad pH range. When anions and organics coexisted, Al-S957 exhibited significantly better fluoride adsorption performance compared to aluminum-loaded monofunctional resins. The adsorption followed an endothermic chemisorption process on a monolayer surface. FTIR and XPS analyses further revealed that fluoride removal relied on a ligand exchange mechanism. Column adsorption conducted over five cycles highlighted the strong practical potential of Al-S957. The results suggested that Al-S957 exhibits significant potential for practical applications.https://www.mdpi.com/2076-3417/15/14/7829aluminumresinfluoride removaladsorptionligand exchange
spellingShingle Mengfei Ma
Yingpeng Gu
Ruijie Wang
Yue Sun
Aluminum-Loaded Bifunctional Resins for Efficient Fluoride Removal from Aqueous Solutions
Applied Sciences
aluminum
resin
fluoride removal
adsorption
ligand exchange
title Aluminum-Loaded Bifunctional Resins for Efficient Fluoride Removal from Aqueous Solutions
title_full Aluminum-Loaded Bifunctional Resins for Efficient Fluoride Removal from Aqueous Solutions
title_fullStr Aluminum-Loaded Bifunctional Resins for Efficient Fluoride Removal from Aqueous Solutions
title_full_unstemmed Aluminum-Loaded Bifunctional Resins for Efficient Fluoride Removal from Aqueous Solutions
title_short Aluminum-Loaded Bifunctional Resins for Efficient Fluoride Removal from Aqueous Solutions
title_sort aluminum loaded bifunctional resins for efficient fluoride removal from aqueous solutions
topic aluminum
resin
fluoride removal
adsorption
ligand exchange
url https://www.mdpi.com/2076-3417/15/14/7829
work_keys_str_mv AT mengfeima aluminumloadedbifunctionalresinsforefficientfluorideremovalfromaqueoussolutions
AT yingpenggu aluminumloadedbifunctionalresinsforefficientfluorideremovalfromaqueoussolutions
AT ruijiewang aluminumloadedbifunctionalresinsforefficientfluorideremovalfromaqueoussolutions
AT yuesun aluminumloadedbifunctionalresinsforefficientfluorideremovalfromaqueoussolutions