Fluoride Removal by Calcium-aluminum-cerium Ternary Composite: Adsorption Performances and Mechanism
Fluoride-containing industrial wastewater poses great threat to environmental safety and human health. In this study, calcium-aluminum-cerium ternary composite (CAC) was synthesized by co-precipitation method, and characterized by XRD, FTIR, N2 adsorption, SEM, etc.. The performances and mechanisms...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | Chinese |
| Published: |
Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences
2025-06-01
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| Series: | Kuangchan zonghe liyong |
| Subjects: | |
| Online Access: | http://www.kczhly.com/en/article/doi/10.12476/kczhly.202208250537 |
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| Summary: | Fluoride-containing industrial wastewater poses great threat to environmental safety and human health. In this study, calcium-aluminum-cerium ternary composite (CAC) was synthesized by co-precipitation method, and characterized by XRD, FTIR, N2 adsorption, SEM, etc.. The performances and mechanisms of F- adsorption by CAC were thoroughly investigated. Experimental results showed that weakly acidic environment (pH 5.0) was favorable for F- removal by CAC adsorption. F- adsorption by CAC was a spontaneous and endothermic process, which could be well described by the Langmuir model. The maximum adsorption capacity was calculated to be 56.28 mg/g, while the adsorption equilibrium reached at about 12 h. The pseudo-second-order kinetic model fitted the adsorption kinetic well. F- adsorption was remarkably affected by the co-existing CO32- and HCO3-, while Cl-, Br-, SO42- influenced F- adsorption little. Electrostatic attraction and ion exchange were considered to be the main adsorption mechanisms. |
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| ISSN: | 1000-6532 |