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Photocatalytic Degradation of Dye Polluted Wastewater Using Titanium Dioxide |
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PP: 11-22 |
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Author(s) |
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Abdelaziz A. Noaman,
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Abstract |
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| Advanced oxidation processes (AOPs) offer a promising alternative to classical treatment methods (e.g., adsorption, flocculation, and air stripping) of treating water and wastewater. AOPs are able to treat pollutants more efficiently by completely mineralizing them to more stable species of carbon dioxide, water and inorganic ions.
The operational parameters influencing the photocatalytic degradation rate of methylene blue in dye polluted wastewater treatment were studied. These parameters are initial dye concentration, catalyst concentration, H2O2 volume. The catalysts used were titanium dioxide (TiO2), Hydrogen peroxide (H2O2) in all experiments to increase the efficiency of the UV/TiO2 process.
The experiments of UV-lamp revealed that the best removal is 67.37% when using 1.5-gram TiO2 /L of pollutant solution, but in the solar UV experiment the best removal is 99.09 % when using 1 gram of TiO2 /L of pollutant solution. The effect of initial dye concentrations on the photocatalytic degradation showed the limits of concentrations which can be removed easily, 5 ppm gave the best results of pollutant degradation. Addition of H2O2 to the pollutant stream improved the photocatalytic degradation of pollutant. The effect of different flowrates on the photocatalytic degradation showed the best flow rate was 500 ml/min which should be used to achieve the best results.
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