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2010•Chinese Journal of Applied ChemistryRequires access

Preparation of Activated Carbon/CoFe_2O_4 Composite and Its Adsorption Properties for Methylene Blue

Lun Ai

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Abstract

Activated carbon/CoFe2O4 composite(AC/CoFe2O4,MAC) with magnetic seperation performance was synthesized via a low-temperature refluxing route.Batch experiments were carried out to investigate the adsorption kinetics and equilibrium of methylene blue(MB) onto MAC.The effect of initial pH value on MB adsorbed onto MAC was evaluated.It was found that the adsorption of MB onto MAC was a very rapid process,reaching to the equilibrium within 20 min.The pseudo-second-order rate equation could describe the adsorption kinetics of the MB onto MAC.The equilibrium data could be fitted well with the Langmuir equation.The saturated adsorption capacity obtained from the Langmuir equation was 120.48 mg/g.At lower pH values,adsorption capacity of MAC for MB was small,whereas it increased with increasing pH value.

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Activated carbon/CoFe2O4 composite(AC/CoFe2O4,MAC) with magnetic seperation performance was synthesized via a low-temperature refluxing route.Batch experiments were carried out to investigate the adsorption kinetics and equilibrium of methylene blue(MB) onto MAC.The effect of initial pH value on MB adsorbed onto MAC was evaluated.It was found that the adsorption of MB onto MAC was a very rapid process,reaching to the equilibrium within 20 min.The pseudo-second-order rate equation could describe the adsorption kinetics of the MB onto MAC.The equilibrium data could be fitted well with the Langmuir equation.The saturated adsorption capacity obtained from the Langmuir equation was 120.48 mg/g.At lower pH values,adsorption capacity of MAC for MB was small,whereas it increased with increasing pH value.

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Available abstract

Activated carbon/CoFe2O4 composite(AC/CoFe2O4,MAC) with magnetic seperation performance was synthesized via a low-temperature refluxing route.Batch experiments were carried out to investigate the adsorption kinetics and equilibrium of methylene blue(MB) onto MAC.The effect of initial pH value on MB adsorbed onto MAC was evaluated.It was found that the adsorption of MB onto MAC was a very rapid process,reaching to the equilibrium within 20 min.The pseudo-second-order rate equation could describe the adsorption kinetics of the MB onto MAC.The equilibrium data could be fitted well with the Langmuir equation.The saturated adsorption capacity obtained from the Langmuir equation was 120.48 mg/g.At lower pH values,adsorption capacity of MAC for MB was small,whereas it increased with increasing pH value.

Key concepts: Chemistry, Adsorption, Methylene blue, Activated carbon, Langmuir adsorption model, Kinetics, Langmuir, Composite number

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Preparation of Activated Carbon/CoFe_2O_4 Composite and Its Adsorption Properties for Methylene Blue — Research Paper | ScholarLens