期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 335, 期 -, 页码 178-187出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2017.04.045
关键词
Diazo anionic dye; Electro-oxidation; Electrocoagulation; Kinetics; COD reduction; Clean processes
资金
- Alexandria University in Egypt
- City of Scientific Research and Technological Applications (SRTA-City) in Egypt
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-O), NaCI concentration (C-N), 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 Co and pH, while the enhancement of j and C-N 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(app)) 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. (C) 2017 Elsevier B.V. All rights reserved.
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