Loading...

Spinel H4Ti5O12 nanotubes for Li recovery from aqueous solutions: Thermodynamics and kinetics study

Shoghi, A ; Sharif University of Technology | 2020

722 Viewed
  1. Type of Document: Article
  2. DOI: 10.1016/j.jece.2020.104679
  3. Publisher: Elsevier Ltd , 2020
  4. Abstract:
  5. In this study, H4Ti5O12 nanotubes have been prepared as Li+ adsorbent by acid treatment of Li4Ti5O12 nanotubes. Li4Ti5O12 nanotubes were synthesized via a hydrothermal method in which TiO2(B) nanNotubes were used as a precursor. The prepared Li-ion sieve showed a significant high ion-exchange capacity (160.6 mgg-1) for lithium ions due to its large specific surface area of 115.4 m2 g-1 compared to the other related studies. The kinetics and isotherm investigation revealed that the pseudo-second-order equation well described the adsorption kinetics, and the Langmuir model well fitted the isotherm data. Furthermore, the low value of adsorption energy obtained from the Dubinin-Radushkevitch (D-R) isotherm suggests that the adsorption process is dominated by physisorption. Statistical analysis of experimental data using elementary statistical techniques demonstrated an acceptable agreement between experimental data and the proposed mathematical model. Overall, results show H4Ti5O12 nanotube's capability as an attractive medium for large scale lithium extraction from aqueous resources. © 2020 Elsevier Ltd
  6. Keywords:
  7. Adsorption isotherms ; H4Ti5O12 ; Ion-sieve ; Kinetics study ; Lithium adsorption ; Statistical analysis ; Ion exchange ; Ions ; Isotherms ; Kinetics ; Lithium ; Nanotubes ; Oxide minerals ; Physisorption ; Titanium dioxide ; Adsorption energies ; Adsorption kinetics ; Hydrothermal methods ; Ion exchange capacity ; Large specific surface areas ; Pseudo-second-order equations ; Statistical techniques ; Thermodynamics and kinetics ; Boron compounds
  8. Source: Journal of Environmental Chemical Engineering ; 2020
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S2213343720310289