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In this study, the CuO/MgO composite was prepared by co-precipitation method, as-prepared samples were characterized by SEM, TEM, XRD and N2 adsorption/desorption isotherms. The removal of tartrazine from aqueous solution by CuO/MgO/H2O2/UV was investigated and compared to other systems with/without H2O2 and UV irradiation. | Journal of Science & Technology 126 (2018) 005-010 Preparation of CuO/MgO Composite for Removal of Tartrazine in Aqueous Solution Phan Thi Yen, Vu Anh Tuan* Hanoi University of Science and Technology – No. 1, Dai Co Viet Str., Hai Ba Trung, Ha Noi, Viet Nam Received: September 06, 2017; Accepted: June 25, 2018 Abstract In this study, the CuO/MgO composite was prepared by co-precipitation method, as-prepared samples were characterized by SEM, TEM, XRD and N2 adsorption/desorption isotherms. The removal of tartrazine from aqueous solution by CuO/MgO/H2O2/UV was investigated and compared to other systems with/without H 2O2 and UV irradiation. The amount of dye removed was determined by measuring the concentration of the dye at its characteristic wavelengths by UV-Vis spectrophotometer. The removal efficiency observed was in the order: CuO/MgO/UV/H2O2>CuO/MgO/H2O2>CuO/MgO/UV>CuO/MgO>UV/H2O2>UV>H2O2. In addition, the pseudo-first order kinetic model was used for fitting the experimental data profiles in order to find the reaction rate constant. Keywords: CuO/MgO, Removal, Tartrazine, Photocatalyst, Composite 1. Introduction production the exact data on the quantity of dyes discarded in environmental is not available. It is reported that 10-15% of the used dyes enter the environment through wastes. Most of synthetic dyes are toxic, even carcinogenic and this poses a serious hazard for human being and aquatic animals [12]. To removal of dyes from textile industrial wastewater, various treatment method based on physical, chemical, biological, acoustical, radiation, and electrical processes have been adopted [13]. Among of these dye removal methods, chemical oxidation method using oxidizing agents such as hydrogen peroxide, ozone, potassium permanganate with assistant of UV light is the most commonly used for removal of dye since they require low quantities and short reaction time and possibly complete degradation of dyes. * Recently, metal oxide nanostructure .
