Removal of fluoride from aqueous solution by natural and acid-activated diatomite and ignimbrite materials
| Autor: | Esengul Kir, Tugba Sardohan-Koseoglu, Hatice Oruc, Ismail Kir |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Aqueous solution
Chemistry Contact time Scanning electron microscope Inorganic chemistry Ocean Engineering 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Pollution chemistry.chemical_compound Adsorption Chemical engineering Fluoride adsorption Freundlich equation Fourier transform infrared spectroscopy 0210 nano-technology Fluoride 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Desalination and Water Treatment. 57:21944-21956 |
| ISSN: | 1944-3986 1944-3994 |
| DOI: | 10.1080/19443994.2015.1124346 |
| Popis: | The aim of this study was to investigate the adsorption capabilities of some natural adsorbents for the removal of fluoride from aqueous solution. The adsorption of fluoride onto diatomite and ignimbrite in aqueous solutions was studied in a batch system. Batch adsorption experiments were conducted to examine the influence of various parameters such as pH, adsorbent amount, contact time, initial fluoride concentration, and temperature. In order to increase adsorption capacity, diatomite and ignimbrite were activated by H2SO4. The fluoride adsorption capacity of acid-activated form was found to be higher than that of the natural form of adsorbents. Characterization of the acid-activated adsorbents was confirmed through scanning electron microscopy, Brunauer–Emmett–Teller, and Fourier transform infrared spectroscopy. All adsorption experimental data fitted with the Freundlich and Dubinin–Radushkevich isotherms. The maximum fluoride removal was obtained within 2 h at an optimum adsorbent amount of 0.... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|