Photo-oxidative degradation of Direct Yellow 12 using hydrogen peroxide
نویسندگان
چکیده
The photo-oxidation process by combination of UV light and H20 2 generates hydroxyl radicals which are capable of oxidising many organic compounds which are refractory type and difficult to oxidize by conve nt ional' chemical treatment. In the present study, photo-oxidation of Direct Yellow 12 (DY 12) dye has been carri ed out in an annular type photoreactor using 8 Watt low pressure mercury lamp along with H20 2 as ox idant. Synthetic dye so lutions of 50 mg/L concentration were used to carry out the experiments. Complete dye degradation and colour removal took place within 30 min with 85-95 % reduction in COD (Chemical Oxygen Demand) va lue. The process of degradation is dependent upon the pH of the so lution .
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