Co(II) removal by magnetic alginate beads containing Cyanex 272

In this study, a series of batch experiments is conducted to investigate the ability of magnetic alginate beads containing Cyanex 272 ® to remove Co(II) ions from aqueous solutions. Equilibrium sorption experiments show a Co(II) uptake capacity of 0.4 mmol g −1. The data are successfully modelled wi...

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Bibliographic Details
Published in:Journal of hazardous materials 2009-07, Vol.166 (2), p.1043-1049
Main Authors: Ngomsik, Audrey-Flore, Bee, Agnès, Siaugue, Jean-Michel, Talbot, Delphine, Cabuil, Valérie, Cote, Gérard
Format: Article
Language:English
Subjects:
Adsorption
Alginate
Alginates - chemistry
Applied sciences
Atmospheric pollution
Chemical engineering
Chemical Sciences
Cobalt - isolation & purification
Exact sciences and technology
Heavy metals
Hydrogen-Ion Concentration
Kinetics
Maghemite
Magnetic separation
Magnetics
Microspheres
Nanoparticles
Phosphinic Acids
Pollution
Remediation
Water Pollutants, Chemical - isolation & purification
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Summary:In this study, a series of batch experiments is conducted to investigate the ability of magnetic alginate beads containing Cyanex 272 ® to remove Co(II) ions from aqueous solutions. Equilibrium sorption experiments show a Co(II) uptake capacity of 0.4 mmol g −1. The data are successfully modelled with a Langmuir equation. A series of kinetics experiments is then carried out and a pseudo-second order equation is used to fit the experimental data. The effect of pH on the sorption of Co(II) ions is also investigated. Desorption experiments by elution of the loaded beads with nitric acid at pH 1 show that the magnetic alginate beads could be reused without significant losses of their initial properties even after 3 adsorption–desorption cycles.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2008.11.109