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- W2896441600 abstract "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, <i>in-situ</i> chemical oxidation technology (ISCO) using persulfate (S<sub>2</sub>O<sub>8</sub><sup>2-</sup>) as an oxidant has appeared to be a promising method for removal of azo dyes. S<sub>2</sub>O<sub>8</sub><sup>2-</sup> can be activated by UV, heat or transition metals to generate sulfate radical (SO<sub>4</sub><sup>-</sup>). In this study, decolorization of Reactive Red 239 (RR239) azo dye via heat activated S<sub>2</sub>O<sub>8</sub><sup>2-</sup> was explored. Experiments were conducted in a cylindrical batch reactor equipped with a water jacket. Effect of parameters such as temperature, pH and S<sub>2</sub>O<sub>8</sub><sup>2-</sup> 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<sup>-1</sup> for decolorization of RR239. The highest decolorization efficiency was obtained at pH=3 under the tested pH range. As S<sub>2</sub>O<sub>8</sub><sup>2-</sup> 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 S<sub>2</sub>O<sub>8</sub><sup>2-</sup> method was a feasible method for decolorization of RR239." @default.
- W2896441600 created "2018-10-26" @default.
- W2896441600 creator A5060475594 @default.
- W2896441600 date "2018-01-01" @default.
- W2896441600 modified "2023-10-11" @default.
- W2896441600 title "Decolorization of Reactive Red 239 Via Heat Activated Persulfate" @default.
- W2896441600 doi "https://doi.org/10.11648/j.ajpc.20180703.11" @default.
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