• development of an efficient catalyst from magnetite ore: characterization and catalytic potential in the ozonation of water toxic contaminants

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 927
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     this study presents the preparation, characterization and activity of a novel natural mineral-based catalyst for the ozonation of water recalcitrant compounds. the raw and calcined magnetite had the specific surface area of 27 m2/g and 34 m2/g, respectively. the effects of solution ph, catalyst dose, model dye concentration, and reaction time on the degradation and mineralization of a selected reactive azo dye viz. reactive red-120 (rr-120) were evaluated. calcined magnetite attained greater catalytic potential than the raw ore in the degradation of rr-120. oxidation via radical species on the surface of the catalyst was the main mechanism of rr-120 degradation in the developed catalytic ozonation process, occurring with a pseudo-first-order reaction rate at a constant of 0.082 min−1 under the optimum ph of 11 and catalyst dose of 3 g/l. accordingly, considering its abundance in nature together with its very high catalytic potential, calcined magnetite is a promising and reliable catalytic material for the ozonation of inhibitory and recalcitrant compounds in water and wastewater.

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