Özet:
Decolonzation of C.I. Acid Orange 7 (AO7) via TiO2-assisted photocatalysis under UV illumination in the presence of H2O2has been investigated. The effect of pH on decolonzation efficiency of AO7 was investigated in TiO2/UV/H2O2process. The performance of TiO2/UV/H2O2system was also evaluated by using synthetic dye-bath effluent of AO7. Solar driven TiO2photocatalysis was found significantly efficient for the decolonzation and degradation of AO7. The rates of decolonzation and degradation of AO7 were found to follow pseudo-first order kinetics. The electrical energy consumption of decolonzation of synthetic dye-bath effluent was found to be 4.1 times higher than that of AO7 solution. Similarly, the electrical energy consumption of degradation of synthetic dye-bath effluent was 2.2 times higher than that of AO7 solution under investigated conditions. Considering one order of magnitude reduction in AO7 concentration and COD value, the cost of electrical energy for decolonzation and degradation of A07 solution and synthetic dye-bath effluent of AO7 was calculated. © 2017, Gh. Asachi Technical University of Iasi. All rights reserved.