Treatment of aqueous solution containing Luganil blue N (LBN) azo dye was performed by an electrochemical method under galvanostatic conditions using an undivided cell with platinum electrodes as working and auxiliary electrodes and standard calomel as the reference electrode. The aqueous solution of NaCl was used as the supporting electrolyte. Preliminary voltammetric studies were performed to establish the mode of degradation process. The effect of polarity of the electrode on degradation and decolouration rate was studied. The effect of the supporting electrolytes, concentration of NaCl, electrolysis time, solution pH and initial dye concentration on degradation rate were evaluated. The optimized operating conditions were used for the treatment of simulated wastewater containing LBN dye. The electrolysis process was monitored by an ultraviolet-visible spectrophotometer and measuring the chemical oxygen demand of the electrolysed solutions. The degradation products were identified using gas chromatograph/mass spectrometry studies, and a suitable mechanism for the LBN dye degradation was proposed.

中文翻译：

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Luganil blue N染料水溶液和模拟废水的处理——一种新的电化学方法

在恒电流条件下使用电化学方法处理含有 Luganil blue N (LBN) 偶氮染料的水溶液，使用未分隔的电池，铂电极作为工作电极和辅助电极，标准甘汞作为参比电极。NaCl水溶液用作支持电解质。进行了初步伏安研究以建立降解过程的模式。研究了电极极性对降解和脱色率的影响。评估了支持电解质、NaCl 浓度、电解时间、溶液 pH 值和初始染料浓度对降解率的影响。优化的操作条件用于处理含LBN染料的模拟废水。电解过程由紫外-可见分光光度计监测并测量电解溶液的化学需氧量。使用气相色谱/质谱研究鉴定了降解产物，并提出了 LBN 染料降解的合适机制。