Abstract
Methyl orange is one of the azo compounds which carcinogenic and damages the water system if untreatead properly. This compound is used in the textile industry as a coloring agent. Dyestuff waste produced from the textile industry is generally a non-biodegradable organic compound, which cause environmental pollution, especially at the aquatic environment. As organic waste, it is necessary to treat this compound to be harmless and safe for the environment. One of the method to remove dye waste is by using photocatalytic reaction using TiO2 as semiconductor. In this study, optimization of UV light source conditions of the photocatalytic reaction was carried out inside a photoreactor system using TiO2 synthesized by hydrothermal method. Optimization of the distance of UV lamps from the surface of methyl orange solution and UV lamps power has been done under the artificial UV light sources with 254 nm wavelength. The percentage of degradation was determined by measuring the absorbance of methyl orange solution before and after degradation using UV-Vis spectrophotometer. It shows that the optimum photocatalytic activity for the distance of UV lamps and UV lamps power is 20 cm and 20 Watt respectively. Physically, there was color changing during the reaction from orange to colorless.
Published Version
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