This study focusses on the electrochemical decomposition of synthetic azo dyes (RO16, RR120 and DR80) using stainless steel electrodes, which is efficient, cost effective and industrially driven process. The experiments were carried out in a continuous electrochemical reactor and the effects of influencing parameters (initial concentration of dye, electrolyte concentration, pH) governing the process efficiency was studied. The interaction between the influencing parameters was investigated using Response Surface Methodology (RSM) and the regression value obtained for the generated model was above 0.9 for all the three dyes. The elimination capacity of electrochemical reactor was studied for the continuous removal of azo dyes with different ranges of concentration (100 - 400 mg L^-1) and flow rate (0.1 - 0.5 L h^-1). The maximum elimination capacity was obtained at a flow rate of 0.5 L h^-1 for 300 mg L^-1 of initial concentration of dye for RO16 and RR120 whereas it was 0.5 L h^-1 for 400 mg L^-1 of DR80. Further, a general dimensionless current density relation has been established for stirred tank reactor and allowed characterizing the relationship between kinetics and mass transport contributing to the overall reaction rate. The results quantitatively confirmed that the rate of electrochemical decolorization increased with the increasing initial dye concentration and flow rate due to the mass transport limitation. As newly established, the decolorization is also directly linked to the number of azo bonds.

这项研究的重点是使用不锈钢电极对合成偶氮染料（RO16，RR120和DR80）进行电化学分解，该方法高效，经济，工业驱动。实验在连续电化学反应器中进行，研究了影响工艺效率的参数（染料的初始浓度，电解质浓度，pH）的影响。使用响应表面方法（RSM）研究了影响参数之间的相互作用，对于所有三种染料，生成的模型获得的回归值均高于0.9。研究了电化学反应器的消除能力，用于连续去除不同浓度范围（100-400 mg L ^-1）和流速（0.1-0.5 L h）的偶氮染料^-1）。对于初始浓度为300 mg L ^-1的RO16和RR120染料，流速为0.5 L h ^-1时可获得最大消除能力，而对于DR80的400 mg L ^-1则为0.5 L h ^-1。此外，已经为搅拌釜反应器建立了一般的无量纲的电流密度关系，并允许表征动力学和传质之间的关系，该关系有助于整体反应速率。结果定量证实，由于质量迁移限制，电化学脱色速率随初始染料浓度和流速的增加而增加。正如新近建立的，脱色也直接与偶氮键的数目有关。