Evaluation of leaching characteristic and kinetic study of lithium from lithium aluminum silicate glass-ceramics by NaOH
| Autor: | Dongseok Lee, Shun Myung Shin, Dong Ju Shin, Sung-Ho Joo |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Ceramics
Environmental Engineering Materials science Inorganic chemistry 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology Activation energy Lithium Chemical reaction symbols.namesake Specific surface area Sodium Hydroxide Environmental Chemistry Zeolite 021102 mining & metallurgy General Environmental Science Arrhenius equation Aqueous solution General Medicine 021001 nanoscience & nanotechnology chemistry symbols Aluminum Silicates Leaching (metallurgy) 0210 nano-technology Aluminum |
| Zdroj: | Journal of Environmental Sciences. 107:98-110 |
| ISSN: | 1001-0742 |
| DOI: | 10.1016/j.jes.2021.02.001 |
| Popis: | The behavior and mechanism of Li leaching from lithium aluminum silicate glass-ceramics which can be used as a secondary source of Li using aqueous NaOH solution was investigated. The Li leaching efficiency is increased with increasing concentration of NaOH, specific surface area, and reaction temperature. When leached under optimum conditions, 2 mol/L NaOH, 53 μm particle undersize, 1:10 solid/liquid ratio, 250 r/min stirring speed, 100°C reaction temperature, 12 hr, the Li leaching efficiency was approximately 70%. However, when the leaching experiment was performed for 48 hr, the concentration of Li+ ions contained in the leach liquor decreased from 1160 to 236 mg/L. To investigate the origin of this phenomenon, the obtained leach residue was analyzed by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. These analyses show that zeolite was formed around the lithium aluminum silicate glass-ceramics, which affected the leaching of by adsorbing Li+ ions. In addition, using the shrinking-core model and the Arrhenius equation, the leaching reaction with NaOH was found to depends on the chemical reaction of the two reactants, with a higher than 41.84 kJ/mol of the activation energy. |
| Databáze: | OpenAIRE |
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