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    Title: Removal of manganese ions from artificial groundwater by oxidation using KMnO4 and characterization of produced MnO2 particles
    Authors: Piaw Phatai
    Jatuporn Wittayakun
    Nurak Grisdanurak
    Wen-Hsiang Chen
    Meng-Wei Wan
    Chi-Chuan Kan
    Contributors: 環境工程與科學系
    Keywords: Manganese removal
    MnO2 particle
    Adsorption behavior
    Date: 2009-10-18
    Issue Date: 2011-11-14 16:37:24 (UTC+8)
    Abstract: The aim of this research is to investigate conditions for the removal of manganese ions from artificial groundwater by
    oxidation with KMnO4 to keep their concentration below the allowed levels (0.05 mg/L). The process includes low-level
    aeration and KMnO4 combination in a Jar test system. The manganese oxide (MnO2) particles produced from oxidation
    were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray analysis
    (EDX). The particles were in amorphous phase and were active adsorption sites for the removal of manganese ions.
    Parameters in the oxidation were solution pH, oxidant dosage, and stirring speed. The optimum solution pH was 8.0 which
    gave a complete Mn removal within 15 min. An increase of stirring speed diminished the rate of oxygen transfer and the
    proper speed was 120 rpm. Conversely, the adsorption activity of the particles at pH 9.0 complemented the oxidation of
    manganese ions exhibiting analogous effect with less consumption of KMnO4 than the required theoretical amount to
    complete the reaction.
    Appears in Collections:[Dept. of Environmental Engineering and Science (including master's program)] Proceedings

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