Browsing by Author "Aregahegn Zeyede"

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    Application of Chemometrics Methods to Resolve Intermediates Formed During Photocatalytic Degradation of Methyl Orange
    (Addis Ababa Universty, 2016-06) Aregahegn Zeyede; Chandravanshi B.S. (Professor)
    The efficiency of two catalysts (TiO2 and TiO2 supported on zeolite) for the photocatalytic degradation of MO dye has been evaluated by means of chemometrics methods by using UV/Vis spectroscopic data of the degraded dye. This study provides clear evidence about the catalytic efficiency of the two catalysts under UV light irradiation for the degradation of MO dye. MCRALS statistical method was used for the catalytic efficiency evaluation. MO photodegradation at pH 3 using TiO2 catalyst shows better decolorization efficiency than at pH 8 and using TiO2 supported on zeolite catalyst but the kinetics of MO degradation is quicker at pH 8. For the degradation using TiO2 at pH = 3, after 150 min of photocatalysis reaction, the species that shows the concentration profile of MO disappears. The kinetics data reveals that the reaction is first order with respect methyl orange in any case. Key words: Chemometrics, Photodegradation, MCR-ALS, MO and TiO2