Sorption equilibria of metal ions on bone char

The ability of bone char to adsorb three metal ions, namely, copper(II), zinc(II) and cadmium(II) ions from wastewater has been studied. Three single-component equilibrium systems and three binary equilibrium systems have been measured experimentally. The three single-component equilibrium data were...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2004, Vol.54 (3), p.273-281
Main Authors: Ko, Danny C.K., Cheung, Chun Wai, Choy, Keith K.H., Porter, John F., McKay, Gordon
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Applied sciences
Bone and Bones - chemistry
Cadmium
Charcoal - chemistry
Chemistry
Copper
Exact sciences and technology
General and physical chemistry
General purification processes
Ideal adsorbed solution theory
Kinetics
Metals, Heavy - chemistry
Models, Chemical
Multicomponent equilibrium isotherm
Pollution
Surface physical chemistry
Wastewaters
Water Purification - methods
Water treatment and pollution
Zinc
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Summary:The ability of bone char to adsorb three metal ions, namely, copper(II), zinc(II) and cadmium(II) ions from wastewater has been studied. Three single-component equilibrium systems and three binary equilibrium systems have been measured experimentally. The three single-component equilibrium data were analyzed using the Langmuir and the Sips equilibrium isotherm equations. The Sips isotherm gave a better fit of the experimental data than the Langmuir isotherm based on the sum of squares errors (SSE) analysis. The Cu–Zn, Cu–Cd and Cd–Zn binary equilibrium experimental data were examined by incorporating the Langmuir and the Sips isotherm equations into the ideal adsorbed solution theory (IAST). The solution methods and the predicted results for the three binary systems at different metal ion compositions have been evaluated. In addition, the application of the IAST to the model prediction for the fixed bed system is presented.
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2003.08.004