Sorption of rare-earth erbium from aqueous solution onto sol-gel-derived zirconia
Zirconia powder was synthesized via sol gel method and used for erbium sorption. The adsorption is strongly dependent on pH of the medium where the removal efficiency increases as the pH turns to alkaline range. The process was very fast initially and maximum adsorption was attained within...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Association of Chemical Engineers of Serbia
2016-01-01
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| Series: | Hemijska Industrija |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/0367-598X/2016/0367-598X1500040S.pdf |
| Summary: | Zirconia powder was synthesized via sol gel method and used for erbium
sorption. The adsorption is strongly dependent on pH of the medium where the
removal efficiency increases as the pH turns to alkaline range. The process
was very fast initially and maximum adsorption was attained within 60 min of
contact. Pseudo-second-order model and homogeneous particle diffusion model
(HPDM) was found to be the best to correlate the diffusion of erbium into
zirconia particles. Adsorption thermodynamic parameters were calculated.
Erbium adsorption is an endothermic (ΔH > 0) and good affinity of erbium ions
towards the zirconia (ΔS > 0). |
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| ISSN: | 0367-598X 2217-7426 |