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Effects of Operational Parameters on the Decolourisation of Reactive Red 195 Dye from Aqueous Solutions by Electrochemical Treatment

机译:操作参数对水溶液中活性红195染料电化学脱色的影响

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One of the most polluting factors in the environment is the textile industries’ wastewaters since theynotably have complex ingredients and occurs in large volume. Moreover its effluents are in need ofadvanced treatment to be able to smoothly discharge to the receiving media. This study investigated thedecolourisation efficiency of electrocoagulation process using three different electrodes, aluminum, zincand iron, in Reactive Red 195 dye removal from model solutions. Effect of major operational parameterssuch as current density, pH, sacrificial electrode materials and operation time was followed forpercentage decolourisation efficiency. The performance of the process was found to be maximum withiron electrode for Reactive Red 195 dye, but aluminum electrode was the best one for the real textilewastewater that is the mixture of textile dyes. Decolourisation efficiency reached to 98% employingcurrent density of 40 mA cm -2 and iron electrode for the real effluent containing the dye, and COD waseliminated 74% employing aluminum electrode at the same current density. As a conclusionelectrocoagulation was found to be efficient in treating and decolorizing the textile effluents and modelsolutions.
机译:环境中污染最严重的因素之一是纺织工业的废水,因为它们的成分非常复杂并且大量存在。此外,需要对其废水进行高级处理,以使其能够平稳地排放到接收介质中。这项研究调查了使用铝,锌和铁这三种不同的电极从模型溶液中去除活性红195染料时电凝过程的脱色效率。遵循主要操作参数(例如电流密度,pH,牺牲电极材料和操作时间)的影响以提高脱色效率。结果发现,用铁电极对活性红195染料的处理性能最高,但对于真正的纺织废水即纺织染料的混合物,铝电极是最好的。使用40 mA cm -2的电流密度和含染料的实际流出物的铁电极,脱色效率达到98%,而在相同电流密度下,使用铝电极消除74%的COD。得出的结论是,电凝被发现可有效地处理纺织废水和模型溶液并使其脱色。

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