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KMID : 1024520050140090881
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Journal of the Environmental Sciences
2005 Volume.14 No. 9 p.881 ~ p.888
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Biosorption of Rhodamine B onto Waste Activated Sludge: Equilibrium and Kinetic Modelling
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Lee Chang-Han
Ahn Kab-Hwan
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Abstract
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The biosorption of dye, Rhodamine B(Rh-B), onto waste activated sludge was investigated. The biosorption capacity and contact time were shown as a simulation of dye adsorption equilibrium and kinetics models. We observed that biosorption of Rh-B occurred rapidly less than 4 hr. These experimental data could be better fitted by a pseudo-second-order rate equation than a pseudo-first-order rate equation. The equilibrium dependence between biosorption capacity and initial concentration of Rh-B was estimated and it was found that the equilibrium data of biosorption were fitted by four kinds of model such as Langmuir, Freundlich, Redlich-Peterson, and Koble-Corrigan model. The average percentage errors, , observed between experimental and predicted values by above each model were , respectively, indicating that Freundlich and Redlich-Peterson model could be fitted more accrately than other models.
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KEYWORD
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Waste activated sludge, Equilibrium, Kinetics, Dye, Rhodamine B, Biosorption
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