application of photo-fenton system (uv/ h2o2/ fe2+) for efficient decolorization of azo-dye acid yellow 17 in aqueous solution

Herein we report, the robustness of uv/h2o2/fe2+ system for efficient decolorization of azodye acid yellow (ay17) solution. it has been found that 88% ay17 decolorized by uv/h2o2/fe^2+ system in 25 minutes under the following optimized conditions; [dye] = 0.14 mm, [h2o2] =1.0 mm, [fe2+ ] = 0.09 mm, stirring velocity =100 rpm, and ph = 3.0. the decolorization of ay17 by uv/h2o2/fe2+ system exhibits secondorder reaction kinetics. thermodynamic parameters, activation enthalpy, rh*, (13.76 kj/mol^1), and entropy δs*, (0.034686 j/k) of the dye decolorization were also determined. it was ascertained that electrolytes such as hco3^−, co3^2−, cl^−, and so4^2− decrease the decolorization efficiency by scavenging the hydroxyl radical generation in the dye solution. finally, the ay17 decolorization in the tape water sample by uv/h2o2/fe^2+ system was also examined.