| dc.description.abstract |
In this study, the oxidative decolorization of C.I. reactive yellow 145 (RY 145) from
synthetic textile wastewater including RY 145 and polyvinyl alcohol by Fenton and
sono-Fenton processes which are the combination of Fenton process with ultrasound
has been carried out. The effects of some operating parameters which are the initial
pH of the solution, the initial concentration of Fe2þ, H2O2, and the dye, temperature,
and agitation speed on the color and chemical oxygen demand (COD) removals have
been investigated. The optimum conditions have been found as [Fe2þ]¼20 mg/L,
[H2O2]¼20 mg/L, pH 3 for Fenton process and [Fe2þ]¼20 mg/L, [H2O2]¼15 mg/L, pH 3
for sono-Fenton process by indirectly sonication at 35 kHz ultrasonic frequency and
80W ultrasonic power. The color and COD removal efficiencies have been obtained as
91 and 47% by Fenton process, and 95 and 51% by sono-Fenton processes, respectively.
Kinetic studies have been performed for the decolorization of RY 145 under optimum
conditions at room temperature. It has been determined that the decolorization has
occurred rapidly by sono-Fenton process, compared to Fenton process. |
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