Abstract

This study presented the comparison of the electrocoagulation efficiencies for steel, aluminum, and copper electrodes for the chemical oxygen demand (COD) removal and decolorization from solutions comprising the reactive orange 16. The electrodes were used in similar couples in this research, namely, Fe (anode) to Fe (cathode), Al (anode) to Al (cathode), and Cu (anode) to Cu (cathode). The samples were analyzed using spectrophotometric techniques UV/VIS and a colorimetric method. Higher removal efficiencies for color and COD were found at the current density of 0.025 A/cm², i.e. Fe/Al/Cu electrodes gave 91, 62, and 51% in the COD removal and 93, 82, and 70% for color removal. Other parameters taken such as pH, electrolysis time, and the initial azo dye concentrations were also optimized at all of the electrodes. The decolorization and COD removal efficiencies were found decreased with increasing the initial dye concentration. Being simple and cost effective, this technique can be applicable for the treatment of real textile wastewater.

中文翻译：

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使用钢、铝和铜金属板作为电极电凝聚活性橙 16 纺织染料溶液

摘要

本研究比较了钢、铝和铜电极对含有活性橙 16 的溶液的化学需氧量 (COD) 去除和脱色的电凝效率。在本研究中，电极用于类似的电极对，即 Fe （阳极）到 Fe（阴极），Al（阳极）到 Al（阴极），以及 Cu（阳极）到 Cu（阴极）。使用紫外可见分光光度技术和比色法对样品进行分析。^{在0.025 A/cm 2}的电流密度下发现了较高的颜色和COD去除效率，即Fe/Al/Cu电极的COD去除率为91%、62%和51%，颜色去除率为93%、82%和70%。 。其他参数（例如 pH、电解时间和初始偶氮染料浓度）也在所有电极上进行了优化。发现脱色和 COD 去除效率随着初始染料浓度的增加而降低。该技术简单、成本低，可应用于实际纺织废水的处理。