Abstract

Anek Suddai, Prawit Nuengmatcha and Saksit Chanthai

DOI : http://dx.doi.org/10.13005/ojc/330435

An excess amount of manganese is known to affect neurological toxicity. This study focused on adsorptive removal of Mn(II) using graphene oxide, whichwas carried out under optimum conditions after varying some experimental effects includingpH, anincubation time and aninitial concentration. It was demonstrated that Mn(II) adsorption follows both Langmuir and Freundlich isotherms. The maximum adsorption capacity for Mn(II) removal from an aqueous solution was 41.67 mg/g at pH 5 and their adsorption state was completed within 30 min. The adsorption kinetics was in accordance with pseudo second-order kinetic model. In thermodynamics diversion, changes in free energy, enthalpyand entropywere also studied.Overall, the adsorption process was exothermic and spontaneous in nature.

Graphene oxide; Manganese; Adsorption isotherm; Thermodynamics; Kinetics

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