Kinetic Study of Sr2+ Sorption by Bone Char

The effect of particle size, bone char mass, initial pH, and metal concentration on the kinetics of Sr 2+ sorption by bone char was studied and discussed. Considering the sorbed amounts of Sr 2+ , solution pH changes, changes of Ca 2+ concentrations and Ca/Sr molar ratios, with time, it was conclude...

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Published in:Separation science and technology 2009-02, Vol.44 (3), p.645-667
Main Authors: Dimovic, Slavko, Smiciklas, Ivana, Plecas, Ilija, Antonovic, Dusan
Format: Article
Language:English
Subjects:
Bone char
kinetic models
sorption kinetics
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Smiciklas, Ivana
Plecas, Ilija
Antonovic, Dusan
description The effect of particle size, bone char mass, initial pH, and metal concentration on the kinetics of Sr 2+ sorption by bone char was studied and discussed. Considering the sorbed amounts of Sr 2+ , solution pH changes, changes of Ca 2+ concentrations and Ca/Sr molar ratios, with time, it was concluded that surface complexation reactions are dominant in the first, more rapid stage of the sorption process, while the contribution of the ion-exchange mechanism increases with time and becomes more significant in the second, slower phase. Under all investigated experimental conditions, the pseudo-second-order model was found to provide high correlation coefficients and the equilibrium amounts of Sr 2+ sorbed comparable to the values obtained experimentally.
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subjects Bone char
kinetic models
sorption kinetics
title Kinetic Study of Sr2+ Sorption by Bone Char
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