Abstract：
Efficient treatment of textile dyeing wastewater can be achieved through electrocoagulation (EC) with minimal sludge production; however, the selection of the appropriate electrode is essential in lowering overall costs. Also, the reuse of the treated aqueous azo dye solution from this process has not been explored in detail. With these objectives, this study aims to treat synthetic azo dye solutions and achieve high colour removal efficiency (CRE%) using similar (Ti-Ti) and dissimilar (Ti-Cu) metal electrodes through EC with an attempt to reduce the cost. The aqueous Coralene Rubine GFL azo dye was used to examine the efficiency and cost of the EC process. X-Ray Photoelectron Spectroscopy was used to study the EC mechanism, while High Performance Liquid Chromatography was used to analyse the degradation of the dye and the formation of intermediate compounds. The concentration of metal ions in the treated dye solution was quantified using Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES), with Ti-Ti treated solution having 14.20 mg/L concentration of Ti and Ti-Cu treated solution having 0.078 mg/L of Ti and 0.001 mg/L of Cu, respectively. Colour removal efficiency of 99.49% was obtained for both electrode sets, with a lower operating time and voltage for dissimilar metal combination. Ecotoxicity studies showed negligible toxicity of Ti-Cu treated dye samples compared to untreated solutions. Survival rate, protein estimation, and catalase activity was used to validate the treatment method\'s efficacy. The study found that the dissimilar electrode material exhibited reduced toxicity due to the presence of heavy metals below the permissible limit.
摘要：
可以通过电凝聚（EC）实现对印染废水的有效处理，同时产生最少的污泥；但是，选择合适的电极对于降低总成本至关重要。此外，从该过程中处理过的偶氮染料水溶液的再利用尚未详细探讨。有了这些目标,这项研究旨在处理合成偶氮染料溶液，并使用相似的（Ti-Ti）和不同的（Ti-Cu）金属电极通过EC实现高颜色去除效率（CRE％），试图降低成本。使用水性CoraleneRubineGFL偶氮染料来检查EC工艺的效率和成本。X射线光电子能谱用于研究EC机理，而高效液相色谱法用于分析染料的降解和中间体化合物的形成。使用电感耦合等离子体发射光谱(ICP-OES)定量处理的染料溶液中的金属离子浓度,用具有14.20mg/L的Ti浓度的Ti-Ti处理的溶液和具有0.078mg/L的Ti和0.001mg/L的Cu的Ti-Cu处理的溶液,分别。两种电极组的颜色去除效率均为99.49％，具有较低的工作时间和不同的金属组合电压。生态毒性研究表明，与未处理的溶液相比，Ti-Cu处理的染料样品的毒性可忽略不计。存活率,蛋白质估算，过氧化氢酶活性用于验证治疗方法的疗效。研究发现，由于重金属的存在低于允许的极限，异种电极材料的毒性降低。
