Adsorption of Methyl Orange Dye Using Fe-Mn Composite Powder as Adsorbent (original) (raw)

Abstract

In this study Fe-Mn composite powder was synthesized and used as an adsorbent for the removal of Methyl Orange (MO) from aqueous solution. The effect of various parameters such as pH (2.0-8.0), contact time (2 to 30 min), adsorbent dose (0.25-1g/L) and initial concentration of dye (40-140 mg/L) on the adsorption process were studied. The optimum removal of the MO was at low pH (pH=2.0) and at with an initial concentration of 140 mg/L. CR removal of 85.93 % was achieved within 30 min. The maximum capacity of the adsorbent was found 405.11 mg/g. The experimental results were best fitted by Langmuir isotherm. Langmuir adsorption isotherm model reflects monolayer adsorption and adsorption takes place at specific homogeneous sites within the adsorbent. The adsorption kinetics was well described by pseudo-second-order reaction model. Pseudo-second-order model suggested that adsorption is chemisorptions in nature.

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