Abstract

Removal of azo dye (Novacron Orange C-3R) in water using vacuum ultraviolet (VUV) process was investigated. The factors affecting the VUV process included concentration of dye, power of VUV and bicarbonate (HCO3-) were studies. Ultraviolet (UV) experiment was also performed for comparison. Initial dye concentrations of 5, 10, and 50 mg/L, VUV powers of 30, 60, and 120 W and bicarbonate 450 and 900 mg/L as CaCO3 were tested. At lamp power of 120 W, VUV process could be reduced 99.85 % of dye and 99% of chemical oxygen demand (COD) while UV process reduced 44.69 % of dye, 50% of COD. Bicarbonate was found to have little impact on dye removal rate.

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