Physicochemical characteristics and mechanism of fluoride removal using powdered zeolite-zirconium in modes of pulsed& continuous sonication and stirring
| Autor: | Sina Dobaradaran, Bahman Ramavandi, Seyedenayat Hashemi, George A. Sorial, Sima Farjadfard, Rauf Foroutan, Amir Hossein Mahvi, Hossein Arfaeinia, Arezo Savari, Moradali Fouladvand |
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| Rok vydání: | 2020 |
| Předmět: |
Zirconium
Materials science General Chemical Engineering Sonication chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Chloride 0104 chemical sciences chemistry.chemical_compound Adsorption Wastewater chemistry Chemical engineering Mechanics of Materials medicine Freundlich equation 0210 nano-technology Zeolite Fluoride medicine.drug |
| Zdroj: | Advanced Powder Technology. 31:3521-3532 |
| ISSN: | 0921-8831 |
| DOI: | 10.1016/j.apt.2020.06.039 |
| Popis: | The current work reports the first application of the fluoride removal using zeolite-zirconium powder in three modes of pulsed sonication, continuous sonication, and stirring. The properties of powdered zeolite-Zr were specified using surface analysis techniques (surface area: 109.71 m2/g and pore volume: 0.08 cm3/g). For all the studied modes, the highest removal rate was observed at pH 7, contact time of 80 min, and zeolite-Zr dose of 3 g/L. Adsorption-desorption experiments were carried out in 6 steps and the fluoride removal was reached to 80% for the final step. The effect of co-existing anions was also studied and chloride and nitrate did not have much effect on efficiency. The powdered zeolite-Zr demonstrated the high ability to remove fluoride from actual wastewater. The data of the present study were well suited to the model of the Freundlich isotherm and the pseudo-second-order kinetic. The pulsed sonication with a maximum adsorption capacity of 32.98 mg/g has been able to demonstrate better performance in comparison with the continuous sonication and stirring mode. |
| Databáze: | OpenAIRE |
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