A comparison study of two different types of clay for heterogeneous photo degradation of dye

Acid alizarin black (AAB) dye (C.I. 21725) was degraded in aqueous solution using UV light in the presence of two types of clay (C1 and C2) as a catalyst at different operating conditions. The operating conditions were concentration of catalyst dosage (10, 30 and 50 mg), initial concentration of AAB dye (10, 20 and 30 mg/L), pH (2, 4, 6, 9 and 11) and intensity of UV light (6 and 12 watt). It was found that the increasing of catalyst concentration enhanced the dye decolourisation. C1 and C2 exerted positive effects on the AAB removal whilst the initial concentration of AAB negatively affected its removal. It was also found that the removal efficiency of AAB significantly depend on pH value. In high and low pH values removal percent increase, while a reversed trend was observed at with the pH value close to neutral. The result shown that removal percent of dye increased when 12 watt lamp used instead 6 watt lamp. C1 and C2 clay were analysed by X-Ray fluorescence to determine the metal oxides in clays. (C) 2015 IASE Publisher All rights reserved.