Adsorption Performance and Mechanism of Synthetic Schwertmannite to Remove Low-Concentration Fluorine in Water
| Autor: | Lin Fan, Bo Zhou, Yaoguo Wu, Zehong Zhang, Sichang Wang, Sihai Hu, Le Wang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Exothermic reaction
Langmuir Health Toxicology and Mutagenesis Inorganic chemistry chemistry.chemical_element 010501 environmental sciences Toxicology 01 natural sciences Adsorption X-ray photoelectron spectroscopy Spectroscopy Fourier Transform Infrared Humans 0105 earth and related environmental sciences Ion exchange Chemistry Schwertmannite Water Fluorine 04 agricultural and veterinary sciences General Medicine Hydrogen-Ion Concentration Pollution Kinetics Wastewater 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Iron Compounds Water Pollutants Chemical |
| Zdroj: | Bulletin of Environmental Contamination and Toxicology. 107:1191-1201 |
| ISSN: | 1432-0800 0007-4861 |
| DOI: | 10.1007/s00128-021-03147-1 |
| Popis: | Fluorine (F) in water has a negative effect on the environment and human health. Schwertmannite has potential remediation to contamination in solution. In this study, the adsorption mechanism and influencing factors of synthetic schwertmannite for low-concentration F were studied through batch experiments. The results suggested that the adsorption of F by schwertmannite reached equilibrium after about 60 min, and the adsorption efficiency exceeded 94%. The experimental data can be best-fit by the pseudo-second-order kinetic and Langmuir models well. Schwertmannite showed effective adsorption at pH 4, dosage 1.5 g L−1, low temperature, and low concentration of co-existing anion. The adsorption process was a spontaneous and exothermic reaction, which was dominated by chemical adsorption. FT-IR and XPS spectra analysis revealed that F adsorption on schwertmannite through the surface complexation and anion exchange reaction between SO42− and OH− with F−, especially the primary role of OH−. The results can provide theoretical support for the schwertmannite application in the treatment of F-containing wastewater. |
| Databáze: | OpenAIRE |
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