Electrocoagulation treatment for Remazol Brilliant Blue R (Reactive Blue 19) removal of textile dye simulated wastewater using iron-aluminum electrodes

K. D. Cruz, S. L. A. Camacho, H. M. P. Rodenas
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Abstract

The presence of non-biodegradable dyes, such as Remazol Brilliant Blue R (Reactive Blue 19), in wastewater poses a significant environmental challenge. This study investigates the application of electrocoagulation using iron-aluminum (Fe-Al) electrodes to efficiently remove Reactive Blue 19 dye from simulated textile dye wastewater. It considers various parameters such as electrode material, current, stirring speed, as well as the influence of sodium chloride acting as a supporting electrolyte to enhance conductivity. Additionally, it evaluates the economic feasibility through electrode consumption analysis. The experimental setup involved a designed reactor with aluminum and iron electrodes arranged at bipolar parallel connection, along with a 30-minute electrocoagulation process conducted at ambient temperature and subsequent filtration of the treated wastewater for UV-VIS analysis. The optimal parameter combination obtained consists of Fe-Al electrode material, a 3 A current, and a 200-rpm stirring speed, achieving 96.87% dye removal. Furthermore, extending the operating time to 60 minutes improved the removal by 99.15%. Under these optimal conditions, the energy consumption measured was 36 kWh/m3. The high dye removal rate obtained shows the effectiveness of this electrocoagulation process in treating Reactive Blue 19 simulated wastewater. A t-test, employed as a hypothesis testing technique with a significance level of 0.05, confirmed the optimal levels of the factors and interactions within the treatment process. A remarkable coefficient of determination of 0.9794 in the dye removal sensitivity analysis signifies a strong goodness of fit, indicating that these three (3) parameters collectively explain how they affect the outcome while accounting for dye removal efficiency variation. These results showed that electrocoagulation is a promising technology for treatment of Reactive Blue 19 dye wastewater.
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使用铁铝电极进行电凝处理,去除纺织染料模拟废水中的雷马佐亮蓝 R(活性蓝 19
废水中存在不可生物降解的染料,如 Remazol 亮蓝 R(活性蓝 19),给环境带来了巨大挑战。本研究调查了使用铁铝(Fe-Al)电极进行电凝的应用,以有效去除模拟纺织染料废水中的活性蓝 19 染料。研究考虑了各种参数,如电极材料、电流、搅拌速度,以及作为支撑电解质的氯化钠对提高电导率的影响。此外,它还通过电极消耗分析评估了经济可行性。实验装置包括一个铝电极和铁电极双极平行连接的反应器,以及一个在环境温度下进行的 30 分钟电凝过程,随后过滤处理后的废水进行紫外可见光谱分析。获得的最佳参数组合包括铁铝电极材料、3 A 电流和 200 转/分钟的搅拌速度,染料去除率达到 96.87%。此外,将运行时间延长至 60 分钟可使染料去除率提高 99.15%。在这些最佳条件下,测得的能耗为 36 kWh/m3。所获得的高染料去除率表明,该电凝工艺在处理活性蓝 19 模拟废水方面非常有效。采用显著性水平为 0.05 的 t 检验作为假设检验技术,证实了处理过程中各因素和相互作用的最佳水平。在染料去除敏感性分析中,确定系数为 0.9794,表明拟合度很高,表明这三个参数共同解释了它们如何影响结果,同时考虑了染料去除效率的变化。这些结果表明,电凝技术是一种处理活性蓝 19 染料废水的有前途的技术。
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