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首页> 外文期刊>Dyes and Pigments >Comparison of hydrogen peroxide-based processes for treating dye-containing wastewater: Decolorization and destruction of Orange II azo dye in dilute solution
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Comparison of hydrogen peroxide-based processes for treating dye-containing wastewater: Decolorization and destruction of Orange II azo dye in dilute solution

机译：基于过氧化氢的处理含染料废水的方法的比较：稀溶液中Orange II偶氮染料的脱色和破坏

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摘要

This work was performed to compare several Advanced Oxidation Processes in the treatment of wastewater containing an organic dye. In particular, aqueous solutions containing 50 ppm Orange II (OG-II) in 0.05 M Na2SO4 at pH 3 and at room temperature were subjected to three different hydrogen peroxide-based oxidation processes in a recycle-batch reactor: Direct Photolysis, the Electro-Fenton process, and a Photoelec-tro-Fenton process with two different iron(II) concentrations (0.2 mM and 0.5 mM). By producing ~·OH radicals as an active oxidant, all of these processes remove the color from the solution in a short time, but the Photoelectro-Fenton with the lower iron level performed best. It not only decolorized the solution in less than 5 min, but it also destroyed 80% of TOC in 60 min of treatment. The comparable TOC removal efficiency was 63% for the Electro-Fenton system and only 31% for Direct Photolysis. It was found that higher levels of catalytic iron ions are detrimental to the Fenton-based processes.
机译：进行这项工作是为了比较处理含有机染料废水中的几种高级氧化工艺。具体而言，在循环分批反应器中，将含有50 ppm Orange II（OG-II）和0.05 M Na2SO4的pH值为3的水溶液在室温下进行三种不同的基于过氧化氢的氧化过程：直接光解，电Fenton过程以及具有两种不同铁浓度（0.2 mM和0.5 mM）的Photoelec-tro-Fenton过程。通过产生〜·OH自由基作为活性氧化剂，所有这些过程都可以在短时间内从溶液中除去颜色，但铁含量较低的光电子-芬顿电极表现最佳。它不仅在不到5分钟的时间内使溶液脱色，而且在60分钟的处理过程中破坏了80％的TOC。对于电子芬顿系统，可比的TOC去除效率为63％，对于直接光解而言仅为31％。发现较高含量的催化铁离子对基于Fenton的方法有害。

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