Ultrasonically assisted synthesis of g-C3N4-activated carbon composite for enhanced defluoridation of water
Fluoride contamination in drinking water poses a health threat. Activated carbon suffers from low fluoride adsorption capacity, which can be enhanced by loading with nitrogen-rich compounds. In this study, graphitic carbon nitride (g-C3N4) nanosheets were loaded onto activated carbon using ultrasoni...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-01-01
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| Series: | Alexandria Engineering Journal |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016823010906 |
| _version_ | 1797347852700090368 |
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| author | Shuang Pei Yujie Hu Yuzhu Huang Yuqian Liu Heli Zhou |
| author_facet | Shuang Pei Yujie Hu Yuzhu Huang Yuqian Liu Heli Zhou |
| author_sort | Shuang Pei |
| collection | DOAJ |
| description | Fluoride contamination in drinking water poses a health threat. Activated carbon suffers from low fluoride adsorption capacity, which can be enhanced by loading with nitrogen-rich compounds. In this study, graphitic carbon nitride (g-C3N4) nanosheets were loaded onto activated carbon using ultrasonic irradiation to synthesize a g-C3N4-activated carbon composite. The ultrasonically synthesized composite exhibited significantly higher fluoride removal capacity of 92.7 mg/g compared to 2.1 mg/g for activated carbon alone. The adsorption followed the Langmuir isotherm model. Thermodynamic analysis revealed the adsorption was spontaneous and exothermic. Characterization confirmed the role of surface complexation between fluoride ions and C-N/CN groups in g-C3N4 for the enhanced adsorption. The composite achieved 82–90% defluoridation of real wastewater samples containing initially 8.7–12 mg/L fluoride. The composite could be regenerated using NaOH and reused for multiple cycles. The study demonstrates the potential of a simple ultrasonic irradiation method for synthesizing a g-C3N4-activated carbon composite with remarkably enhanced defluoridation capacity. The composite is promising for practical decentralized water defluoridation applications, especially in regions affected by high fluoride levels. |
| first_indexed | 2024-03-08T11:54:55Z |
| format | Article |
| id | doaj.art-eacf50c9da444fe99df32ef7c8200e83 |
| institution | Directory Open Access Journal |
| issn | 1110-0168 |
| language | English |
| last_indexed | 2024-03-08T11:54:55Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj.art-eacf50c9da444fe99df32ef7c8200e832024-01-24T05:17:24ZengElsevierAlexandria Engineering Journal1110-01682024-01-0186399404Ultrasonically assisted synthesis of g-C3N4-activated carbon composite for enhanced defluoridation of waterShuang Pei0Yujie Hu1Yuzhu Huang2Yuqian Liu3Heli Zhou4College of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou 412007, ChinaCorresponding author.; College of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou 412007, ChinaCollege of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou 412007, ChinaCollege of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou 412007, ChinaCollege of Materials and Advanced Manufacturing, Hunan University of Technology, Zhuzhou 412007, ChinaFluoride contamination in drinking water poses a health threat. Activated carbon suffers from low fluoride adsorption capacity, which can be enhanced by loading with nitrogen-rich compounds. In this study, graphitic carbon nitride (g-C3N4) nanosheets were loaded onto activated carbon using ultrasonic irradiation to synthesize a g-C3N4-activated carbon composite. The ultrasonically synthesized composite exhibited significantly higher fluoride removal capacity of 92.7 mg/g compared to 2.1 mg/g for activated carbon alone. The adsorption followed the Langmuir isotherm model. Thermodynamic analysis revealed the adsorption was spontaneous and exothermic. Characterization confirmed the role of surface complexation between fluoride ions and C-N/CN groups in g-C3N4 for the enhanced adsorption. The composite achieved 82–90% defluoridation of real wastewater samples containing initially 8.7–12 mg/L fluoride. The composite could be regenerated using NaOH and reused for multiple cycles. The study demonstrates the potential of a simple ultrasonic irradiation method for synthesizing a g-C3N4-activated carbon composite with remarkably enhanced defluoridation capacity. The composite is promising for practical decentralized water defluoridation applications, especially in regions affected by high fluoride levels.http://www.sciencedirect.com/science/article/pii/S1110016823010906FluorideAdsorptionActivated carbonGraphitic carbon nitrideUltrasonic irradiationWater treatment |
| spellingShingle | Shuang Pei Yujie Hu Yuzhu Huang Yuqian Liu Heli Zhou Ultrasonically assisted synthesis of g-C3N4-activated carbon composite for enhanced defluoridation of water Alexandria Engineering Journal Fluoride Adsorption Activated carbon Graphitic carbon nitride Ultrasonic irradiation Water treatment |
| title | Ultrasonically assisted synthesis of g-C3N4-activated carbon composite for enhanced defluoridation of water |
| title_full | Ultrasonically assisted synthesis of g-C3N4-activated carbon composite for enhanced defluoridation of water |
| title_fullStr | Ultrasonically assisted synthesis of g-C3N4-activated carbon composite for enhanced defluoridation of water |
| title_full_unstemmed | Ultrasonically assisted synthesis of g-C3N4-activated carbon composite for enhanced defluoridation of water |
| title_short | Ultrasonically assisted synthesis of g-C3N4-activated carbon composite for enhanced defluoridation of water |
| title_sort | ultrasonically assisted synthesis of g c3n4 activated carbon composite for enhanced defluoridation of water |
| topic | Fluoride Adsorption Activated carbon Graphitic carbon nitride Ultrasonic irradiation Water treatment |
| url | http://www.sciencedirect.com/science/article/pii/S1110016823010906 |
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