Abstract—In this study, adsorption characteristic of manganese (II) ion onto hydrated ferric (III) oxides (HFOs) nanoparticle resins was analyzed and fitted with adsorption isotherm models such as Freundlich, Langmuir, Temkin and Dubinin–Radushkevich isotherms. The Freundlich isotherm model gave the highest
R2 value of 0.9739. The fitted Freundlich parameter (
n) is 6.757, which indicates favorable sorption. The heat of sorption process was estimated from Temkin isotherm model to be 96.749 J•mol
-1 and the mean free energy was estimated from Dubinin–Radushkevich isotherm model to be 288.675 J•mol
-1. The thermodynamic parameters were calculated and it was found that the adsorption process was spontaneous and endothermic and was favored at higher temperature.
Index Terms—Hydrated ferric (III) oxide (HFOs) nanoparticle, adsorption, equilibrium isotherm and manganese (II) ion.
The authors are with the Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Thailand (e-mail: psomchin@tu.ac.th, varong.p@chula.ac.th).
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Cite: Somchintana Puttamat and Varong Pavarajarn, "Adsorption Study for Removal of Mn (II) Ion in Aqueous Solution by Hydrated Ferric (III) Oxides," International Journal of Chemical Engineering and Applications vol. 7, no. 4, pp. 239-243, 2016.
