电fenton法去除磺胺黄EXF活性偶氮染料

Elif Özkul, B. Karabacakoğlu
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摘要

活性染料广泛用于棉织物的染色,且具有耐久性,在纺织工业废水中存在大量活性染料。在处理这类含染料废水时,由于常规处理方法的不足及其缺点,必须采用先进的处理方法。因此,电化学高级氧化法电fenton是一种强有力的替代处理技术,可以完全分解染料分子。本研究采用电fenton法处理含活性偶氮染料Sumifix Yellow EXF的模型废水。电fenton工艺是基于原位生成羟基自由基(OH),一种强氧化剂,利用Fe2+和H2O2在电极上释放或从外部添加。在所使用的电化学电池中,碳纤维作为阴极,铁作为阳极。在阳极产生Fe2+离子的同时,向电池外部添加H2O2。在室温下进行的实验中,使用250 mL的玻璃烧杯作为反应器。在研究中,采用经典的实验设计方法实现了参数的优化。该方法只改变一个参数,保持其他参数不变。为了达到最高的染料去除率,对电压(5 ~ 10 V)、H2O2浓度(9 ~ 74 mM)、Na2SO4浓度(6 ~ 25 mM)和pH(3 ~ 5)进行了实验,并对这些因素对染料去除率和能耗的影响进行了评价。结果表明,电压为7.5 V, H2O2浓度为74 mM, Na2SO4浓度为25 mM, pH值为4时,脱色效果最佳。在这些值下,30分钟的去除率达到98.14%,能耗为7.98 Wh/L。电fenton法是一种高效的废水处理和环境修复方法,在优化条件下能耗合理,脱色效果显著。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Removal Of Sumifix Yellow EXF Reactive Azo Dye By Electro-Fenton Method
Reactive dyes can be found in large quantities in textile industry wastewater due to their widespread use for dyeing cotton fabrics and their durable nature. In the treatment of wastewater containing dyestuffs in this class, advanced treatment methods have become necessary due to the inadequacy of conventional treatment methods and their disadvantages. For this reason, electro-Fenton, an electrochemical advanced oxidation method, is a strong alternative as a treatment technology that provides complete disintegration of dye molecules. In this study, the electro-Fenton method was used to treat model wastewater containing the reactive azo dye Sumifix Yellow EXF. The electro-Fenton process is based on the in situ generation of hydroxyl radicals (⦁OH), a strong oxidant, using Fe2+ and H2O2 released at the electrodes or added from outside. In the electrochemical cell used, carbon fiber was used as the cathode and iron was used as the anode. While Fe2+ ion was produced at the anode, H2O2 was added to the cell externally. In the experiments carried out at room temperature, a 250 mL glass beaker was used as a reactor. In the study, the optimization of the parameters was achieved by using the classical experimental design method. According to this method, one parameter is changed and other parameters are kept constant. In order to achieve the highest dyestuff removal, experiments were conducted by varying the voltage (5–10 V), H2O2 concentration (9–74 mM), Na2SO4 concentration (6–25 mM), and pH (3-5), and the impact of these factors on dye removal and energy consumption was evaluated. It was found that for the best dye removal, voltage is 7.5 V, the H2O2 concentration is 74 mM, the Na2SO4 concentration is 25 mM and the optimum pH value is 4. At these values, 98.14% removal at 30 minutes was achieved with an energy consumption of 7.98 Wh/L. The electro-Fenton method was found to be a highly effective approach for wastewater treatment and environmental remediation, showing remarkable dye removal efficiency with reasonable energy consumption under optimized conditions.
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