Fabrication Technology Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technology Applications (SRTA-City), Alexandria, 21934, Egypt.
Chemical Engineering Department, Faculty of Engineering, Alexandria University, Alexandria, 21544, Egypt.
J Hazard Mater. 2017 Aug 5;335:178-187. doi: 10.1016/j.jhazmat.2017.04.045. Epub 2017 Apr 21.
In this study, a laboratory scale for the treatment of a recalcitrant and toxic synthetic wastewater containing diazo dye, acid brown 14 (AB-14) has been comparatively performed by two electro-catalytic treatment processes, namely anodic oxidation (AO) and electrocoagulation (EC) using a new batch electrochemical cell. Additionally, the influence of several operating parameters such as; current density (j), initial dye concentration (C), NaCl concentration (C), and pH on the color removal efficiency and chemical oxygen demand (COD) are evaluated. The powerful capability of the AO and EC of AB-14 which related to the mechanistic reaction pathway is shown. The poor degradation is ascribed to higher C and pH, while the enhancement of j and C is responsible for better degradation of AB-14 dye. The results indicate that the EC is more effective than AO under the same operational condition. A kinetic model is developed for evaluation of the pseudo-first-order-rate constant (k) as a function of various operational parameters. The results emphasize the high efficiency of AO and EC and the clean processes which are hopeful alternative for the treatment of the large volume wastewater of the textile industry.
在这项研究中，通过使用新型批处理电化学电池，对比了两种电催化处理工艺（阳极氧化（AO）和电凝聚（EC））对含有重氮染料酸性棕 14（AB-14）的顽固有毒合成废水的实验室规模处理。此外，还评估了电流密度（j）、初始染料浓度（C）、NaCl 浓度（C）和 pH 等几个操作参数对颜色去除效率和化学需氧量（COD）的影响。展示了 AO 和 EC 对 AB-14 的强大处理能力及其与机械反应途径的关系。较差的降解归因于较高的 C 和 pH，而 j 和 C 的增强则有利于 AB-14 染料的更好降解。结果表明，在相同操作条件下，EC 比 AO 更有效。开发了一个动力学模型，以评估作为各种操作参数函数的拟一级速率常数（k）。结果强调了 AO 和 EC 的高效率和清洁过程，这是处理纺织工业大量废水的有希望的替代方法。
