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首页> 外文期刊>Dyes and Pigments >Using central composite experimental design to optimize the degradation of real dye wastewater by Fenton and photo-Fenton reactions
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Using central composite experimental design to optimize the degradation of real dye wastewater by Fenton and photo-Fenton reactions

机译：使用中央复合实验设计优化Fenton和光Fenton反应对实际染料废水的降解

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摘要

This work focuses on the use of Fenton reagent and UV-irradiation, in a lab-scale experiment, for the treatment of real dye wastewater coming from a Spanish textile manufacturer. Response surface methodology and a 23 factorial design were used to evaluate the effects of the three independent variables considered for the optimization of the oxidative process: temperature, Fe (II) and H2O2 concentrations, for a textile wastewater generated during a dyeing process with chemical oxygen demand of 1705 mg L~(-1) O2 at pH = 3. Wastewater degradation was followed in terms of chemical oxygen demand reduction. In the optimization, the correlation coefficients for the model (R~2) were 0.985 and 0.990 for Fenton and photo-Fenton treatments respectively. Optimum reaction conditions at pH = 3 and temperature = 298 K were [H2O2] = 73.5 mM and [Fe(II)] = 1.79 mM. The combination of Fenton, Fenton-like and photon-Fenton reactions has been proved to be highly effective for the treatment of such a type of wastewaters, and several advantages for this technique arise from the study. Under optimum conditions, 120 min of treatment resulted in a 62.9% and 76.3% reduction in chemical oxygen demand after Fenton and photo-Fenton treatments respectively.
机译：这项工作的重点是在实验室规模的实验中使用Fenton试剂和紫外线照射来处理来自西班牙一家纺织品制造商的实际染料废水。响应面方法和23因子设计用于评估为优化氧化过程而考虑的三个独立变量的影响：温度，Fe（II）和H2O2浓度，用于化学氧染色过程中产生的纺织废水pH = 3时的需求量为1705 mg L〜（-1）O2。在优化中，Fenton处理和光Fenton处理的模型（R〜2）的相关系数分别为0.985和0.990。在pH = 3和温度= 298 K时的最佳反应条件是[H2O2] = 73.5 mM和[Fe（II）] = 1.79 mM。 Fenton，类Fenton反应和光子-Fenton反应的组合已被证明对这类废水的处理非常有效，这项技术从中获得了许多好处。在最佳条件下，经过120分钟的处理后，芬顿和光芬顿处理分别减少了62.9％和76.3％的化学需氧量。

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