Experimental Evaluation and Thermodynamic Analysis of Magnetic Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs for Highly Efficient Fluoride and Phosphate Removal
Phosphate and fluoride ions are common water pollutants whose presence and excessive discharge cause potential hazards to the environment and human health. MOF materials commonly used to remove phosphate and fluoride ions are usually in powder form, with low recovery during regeneration. Herein, to...
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2025-07-01
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| author | Ziyi Zhang Xinyun Chen Yongyi Yu Wenbin Pan Ruilai Liu Jiangyan Song Jiapeng Hu |
| author_facet | Ziyi Zhang Xinyun Chen Yongyi Yu Wenbin Pan Ruilai Liu Jiangyan Song Jiapeng Hu |
| author_sort | Ziyi Zhang |
| collection | DOAJ |
| description | Phosphate and fluoride ions are common water pollutants whose presence and excessive discharge cause potential hazards to the environment and human health. MOF materials commonly used to remove phosphate and fluoride ions are usually in powder form, with low recovery during regeneration. Herein, to address these issues, Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs magnetic composites for phosphate and fluoride removal were fabricated by means of the hydrothermal method. The adsorption properties of the adsorbent were systematically assessed by means of adsorption experiments. The magnetic Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs exhibited a magnetic recovery efficiency of 93%, and they could maintain outstanding adsorption performance at a broad range of pH values and superior selectivity for phosphate and fluoride ions. The adsorption process conformed to the Langmuir isotherm and pseudo-second-order models, indicating that it was dominated by monomolecular chemisorption. Further characterization of the Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs before and after adsorption and kinetic thermodynamic investigation revealed that the elimination mechanism of phosphate and fluoride ions by Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs includes ion exchange, electrostatic interactions, and surface complexation. This study demonstrates that magnetic reusable Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs composites have great promise for phosphate and fluoride removal and recovery. |
| format | Article |
| id | doaj-art-6a58f2c804bc44e292c1a56ce6f54467 |
| institution | OA Journals |
| issn | 2079-4991 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
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| series | Nanomaterials |
| spelling | doaj-art-6a58f2c804bc44e292c1a56ce6f544672025-08-20T02:36:31ZengMDPI AGNanomaterials2079-49912025-07-011513104310.3390/nano15131043Experimental Evaluation and Thermodynamic Analysis of Magnetic Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs for Highly Efficient Fluoride and Phosphate RemovalZiyi Zhang0Xinyun Chen1Yongyi Yu2Wenbin Pan3Ruilai Liu4Jiangyan Song5Jiapeng Hu6College of Environment and Safety Engineering, Fuzhou University, Fuzhou 350001, ChinaKey Laboratory of Green Chemical Technology of Fujian Province University, Fujian Provincial Key Laboratory of Eco-Industrial Green Technology, Wuyi University, Wuyishan 354300, ChinaCollege of Environment and Safety Engineering, Fuzhou University, Fuzhou 350001, ChinaCollege of Environment and Safety Engineering, Fuzhou University, Fuzhou 350001, ChinaKey Laboratory of Green Chemical Technology of Fujian Province University, Fujian Provincial Key Laboratory of Eco-Industrial Green Technology, Wuyi University, Wuyishan 354300, ChinaResearch Center for Environmental Functional Materials, State Key Laboratory of Water Pollution Control and Green Resource Recycling, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaCollege of Environment and Safety Engineering, Fuzhou University, Fuzhou 350001, ChinaPhosphate and fluoride ions are common water pollutants whose presence and excessive discharge cause potential hazards to the environment and human health. MOF materials commonly used to remove phosphate and fluoride ions are usually in powder form, with low recovery during regeneration. Herein, to address these issues, Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs magnetic composites for phosphate and fluoride removal were fabricated by means of the hydrothermal method. The adsorption properties of the adsorbent were systematically assessed by means of adsorption experiments. The magnetic Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs exhibited a magnetic recovery efficiency of 93%, and they could maintain outstanding adsorption performance at a broad range of pH values and superior selectivity for phosphate and fluoride ions. The adsorption process conformed to the Langmuir isotherm and pseudo-second-order models, indicating that it was dominated by monomolecular chemisorption. Further characterization of the Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs before and after adsorption and kinetic thermodynamic investigation revealed that the elimination mechanism of phosphate and fluoride ions by Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs includes ion exchange, electrostatic interactions, and surface complexation. This study demonstrates that magnetic reusable Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs composites have great promise for phosphate and fluoride removal and recovery.https://www.mdpi.com/2079-4991/15/13/1043phosphate removaldefluoridationmetal–organic frameworksadsorption |
| spellingShingle | Ziyi Zhang Xinyun Chen Yongyi Yu Wenbin Pan Ruilai Liu Jiangyan Song Jiapeng Hu Experimental Evaluation and Thermodynamic Analysis of Magnetic Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs for Highly Efficient Fluoride and Phosphate Removal Nanomaterials phosphate removal defluoridation metal–organic frameworks adsorption |
| title | Experimental Evaluation and Thermodynamic Analysis of Magnetic Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs for Highly Efficient Fluoride and Phosphate Removal |
| title_full | Experimental Evaluation and Thermodynamic Analysis of Magnetic Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs for Highly Efficient Fluoride and Phosphate Removal |
| title_fullStr | Experimental Evaluation and Thermodynamic Analysis of Magnetic Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs for Highly Efficient Fluoride and Phosphate Removal |
| title_full_unstemmed | Experimental Evaluation and Thermodynamic Analysis of Magnetic Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs for Highly Efficient Fluoride and Phosphate Removal |
| title_short | Experimental Evaluation and Thermodynamic Analysis of Magnetic Fe<sub>3</sub>O<sub>4</sub>@La-Zr-MOFs for Highly Efficient Fluoride and Phosphate Removal |
| title_sort | experimental evaluation and thermodynamic analysis of magnetic fe sub 3 sub o sub 4 sub la zr mofs for highly efficient fluoride and phosphate removal |
| topic | phosphate removal defluoridation metal–organic frameworks adsorption |
| url | https://www.mdpi.com/2079-4991/15/13/1043 |
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