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Excess use of various dyes in the textile industry has led to the severe surface water and groundwater contamination by releasing the toxic and coloured effluents. For solving the problems of water contamination new set of technologies have implemented in both water and wastewater recently. Among them, the photocatalytic oxidation process using the nano-photocatalysts is a promising alternative method for treatment of polluted water in textile industries. Nanostructured ZnO is an attractive material for its unique performance in the elimination of waste from the water. The present study investigates the synthesis of ZnO nanoparticle by sol-gel method and characterized by X-ray diffraction (XRD) and SEM. The results showed that pure nano ZnO was composed of uniform distribution particles of ~15 nm and with spherical morphology. The present study aims in the photocatalytic degradation of dye reactive red 198 on the surface of nano ZnO in a batch reactor. The photocatalytic activity for the degradation of azo dye under UV light irradiation in aqueous solutions at different pH has been studied. All the experiments were performed in a photochemical batch reactor equipped with 8-W UV lamp emitting a peak wavelength around 254 nm. Under optimum conditions complete degradation of the organic dye was achieved.

Photocatalytic Performance of Nanocatalyst for the Effective Removal of Dye in the Wastewater