Removal of lead ions from aqueous solution by retorted shale

The equilibrium and kinetic properties of Pb 2+ ion adsorption by retorted shale (RS) have been investigated during a series of batch adsorption experiments. The effects of pH, contact time and adsorbate initial concentration were evaluated. The pseudo-second-order model was used to predict the rate...

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Bibliographic Details
Published inSeparation and purification technology Vol. 56; no. 3; pp. 348 - 353
Main Authors Pimentel, P.M., González, G., Melo, M.F.A., Melo, D.M.A., Silva, C.N., Assunção, A.L.C.
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 15.09.2007
Elsevier Science
Subjects
Adsorption
Adsorption isotherms
Applied sciences
Chemical engineering
Exact sciences and technology
Lead
Retorted shale
Lead
Retorted shale
Adsorption isotherms
Second order
Adsorption
Batchwise
Adsorption isotherm
pH
Kinetics
Aqueous solution
Rate constant
Modeling
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Summary:The equilibrium and kinetic properties of Pb 2+ ion adsorption by retorted shale (RS) have been investigated during a series of batch adsorption experiments. The effects of pH, contact time and adsorbate initial concentration were evaluated. The pseudo-second-order model was used to predict the rate constants of adsorption system. Langmuir and Freundlich models were used to fit the equilibrium data, which showed that Langmuir best-fitted these data. Thermodynamic parameters of adsorption indicate spontaneous and endothermic nature of the process.
ISSN:1383-5866
1873-3794
DOI:10.1016/j.seppur.2007.01.029