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- Title
Adsorption of As(V) on zirconium-based adsorbents.
- Authors
Khuntia, Snigdha; Majumder, Subrata Kumar; Ghosh, Pallab
- Abstract
Adsorption of As(V) on zirconium impregnated activated carbon and amorphous zirconium oxide has been reported in this work. The adsorption of As(V) on both of these adsorbents was fast and effective. The As(V) adsorption capacity of amorphous zirconium oxide was larger than that of zirconium–activated carbon. Characterization of these adsorbents was performed by various methods (viz. SEM, EDX, XRD, and FTIR). The electric charge on the surface of these adsorbents in aqueous media was measured at different pH. The adsorption of As(V) followed a pseudo-second-order kinetics. However, from the intra-particle diffusion model, it was found that film-diffusion and intra-particle diffusion took place simultaneously during adsorption. Langmuir, Freundlich, and Redlich–Peterson adsorption isotherms were fitted to the experimental data. The adsorption of As(V) on these adsorbents was found to be spontaneous and endothermic in nature. The thermodynamic parameters (viz. changes in Gibbs free energy, enthalpy, and entropy) were calculated at different temperatures.
- Subjects
ADSORPTION kinetics; ACTIVATED carbon; SURFACE chemistry; DESORPTION; ADSORBENT regeneration
- Publication
Desalination & Water Treatment, 2016, Vol 57, Issue 4, p1766
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2014.978389