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ADSORPTION OF Ni(II) IONS FROM AQUEOUS SOLUTIONS ONTO MAGNETIC-POLY(DIVINYLBENZENE-CO-VINYLIMIDAZOLE) MICROBEADS: PHYSICOCHEMICAL STUDIES.
- Source :
-
Anadolu University of Sciences & Technology A: Applied Sciences & Engineering . 2012, Vol. 13 Issue 1, p31-49. 19p. - Publication Year :
- 2012
-
Abstract
- A modified suspension polymerization was used for the preparation of the mesoporous magnetic-poly(divinylbenzene-co-vinylimidazole) (m-poly(DVB-VIM)) microbeads in size 53-212 [an of average diameter. The specific surface area and the DVB/VIM mol ratio of the microspheres were determined as 29.47 m²/g and 1:4 mol/mol with Fe3O4, respectively. The physicochemical studies of adsorption of Ni(II) ions from aqueous solutions such as pH, initial concentration, amount of mesoporous m-poly(DVB-VIM) microbeads, contact time, and temperature onto the m-poly(DVB-VIM) microspheres were carried out. The maximum adsorption capacities of the m-poly(DVB-VIM) microspheres towards Ni(II) ions were determined as 13.51, 20.14, 21.00 and 23.62 mg/g at 277 K, 298 K, 318 K, and 338 K, respectively. The dynamic and equilibrium adsorption behaviours of the system were adequately described by the pseudo-second-order kinetic and the Langmuir isotherm models, respectively. Various thermodynamic parameters, such as the Gibbs' free energy change (ΔG°), the standard enthalpy change (ΔH°) and the standard entropy change (ΔS°) were also determined. Morever, after use in the adsorption, the m-poly(DVB-VIM) microbeads with paramagnetic property was separated from the via the applied magnetic force. These results indicate that the material studied could be used as a purifier for the removal of Ni(II) ions from water and wastewater under magnetic field. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13023160
- Volume :
- 13
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Anadolu University of Sciences & Technology A: Applied Sciences & Engineering
- Publication Type :
- Academic Journal
- Accession number :
- 84109035