Volume 7, Issue 3, September 2018, Page: 45-49
Decolorization of Reactive Red 239 Via Heat Activated Persulfate
Ozlem Esen Kartal, Department of Chemical Engineering, İnönü University, Malatya, Turkey
Received: Aug. 14, 2018;       Accepted: Sep. 3, 2018;       Published: Oct. 9, 2018
DOI: 10.11648/j.ajpc.20180703.11      View  266      Downloads  26
Effluents of cotton dyeing process of textile industry is considered as extremely polluted due to presence of unfixed azo dyes and auxiliary chemicals. The complex aromatic structure and non-biodegradability nature of azo dyes involved new and efficient treatment technologies to eliminate intense color from textile wastewater. In recent years, in-situ chemical oxidation technology (ISCO) using persulfate (S2O82-) as an oxidant has appeared to be a promising method for removal of azo dyes. S2O82- can be activated by UV, heat or transition metals to generate sulfate radical (SO4-). In this study, decolorization of Reactive Red 239 (RR239) azo dye via heat activated S2O82- was explored. Experiments were conducted in a cylindrical batch reactor equipped with a water jacket. Effect of parameters such as temperature, pH and S2O82- concentration on decolorization of RR239 was investigated. The results show that decolorization efficiency was enhanced with increasing temperature from 45 to 55°C but further increase in temperature did not enhance decolorization. The pseudo first order rate constant values fit well Arrhenius equation, yielding an activation energy of 108.75 kJ mol-1 for decolorization of RR239. The highest decolorization efficiency was obtained at pH=3 under the tested pH range. As S2O82- concentration increased decolorization efficiency increased. 89.67% and 39.05% decolorization and aromatic degradation efficiencies were observed within 120 minutes of reaction time, respectively. These results show that heat activated S2O82- method was a feasible method for decolorization of RR239.
Heat Activated Persulfate, Sulfate Radical, Azo Dye, Decolorization
To cite this article
Ozlem Esen Kartal, Decolorization of Reactive Red 239 Via Heat Activated Persulfate, American Journal of Physical Chemistry. Vol. 7, No. 3, 2018, pp. 45-49. doi: 10.11648/j.ajpc.20180703.11
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