Single and binary adsorptions isotherms of Cd(II) and Zn(II) on palm kernel shell based activated carbon

A batch adsorption study was conducted to investigate the suitability of palm kernel shell (PKS)-based activated carbon for the removal of cadmium and zinc ions from aqueous solutions. Single component equilibrium data were analyzed using the Langmuir, Freundlich and Redlich–Peterson isotherms. Over...

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Bibliographic Details
Published in:Desalination and water treatment 2011-05, Vol.29 (1-3), p.140-148
Main Authors: Muhammad, Chuah, T.G., Robiah, Yunus, Suraya, A.R., Choong, T.S.Y.
Format: Article
Language:English
Subjects:
Activated carbon
Adsorption
Applied sciences
Binary isotherm
Cadmium
Data
Data processing
Exact sciences and technology
Isotherms
Kernels
Mathematical models
Palm
Palm kernel shell
Pollution
Removal
Shells
Solutions
Water treatment and pollution
Zinc
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Summary:A batch adsorption study was conducted to investigate the suitability of palm kernel shell (PKS)-based activated carbon for the removal of cadmium and zinc ions from aqueous solutions. Single component equilibrium data were analyzed using the Langmuir, Freundlich and Redlich–Peterson isotherms. Overall, the Redlich-Peterson isotherm showed the best fit for all adsorption under investigation. As the binary adsorption is competitive, the extended Langmuir (EL) model could not predict well the binary component isotherm. Three correlative models, the modified extended Langmuir (MEL), modified extended Freundlich (MEF) and modified extended Redlich–Peterson (MERP) models were used to fit binary system equilibrium data. It was found that the binary isotherm data could be described well by the modified extended Langmuir model.
ISSN:1944-3986
1944-3994
1944-3986
DOI:10.5004/dwt.2011.2210