Electrochemical Degradation of Reactive Blue 19 Dye by Combining Boron-Doped Diamond and Reticulated Vitreous Carbon Electrodes

Vasconcelos VM, Ponce-de-León C, Rosiwal S, Lanza MRV (2019)

Publication Language: English

Publication Type: Journal article

Publication year: 2019

Journal

ChemElectroChem Wiley

DOI: 10.1002/celc.201900563

Abstract

Reactive Blue 19 (RB-19) dye has a low fixation efficiency, a long half-life and high toxicity. It is easily loss during the cleaning of textiles and can remain in the environment for a long time, causing serious environmental problems if not removed. This study reports the degradation of RB-19 by: 1) direct electrochemical degradation with boron-doped diamond (BDD) electrodes and 2) combined processes using BDD and reticulated vitreous carbon (RVC) electrodes that generate H2O2. The direct degradation uses different current densities and concentrations. High currents densities, longer electrolysis times and low volumetric flow rates favour RB-19 degradation, removing total colour and 100% TOC after 5 and 60 min, respectively. At a current density of 41 mAcm􀀀 2 and a volumetric flow rate of 20 dm3h􀀀 1, the energy consumption to degrade 20 mgdm􀀀 3 of RB-19 was 279 kWhkg􀀀 1. The TOC removal of RB-19 dye combining BDD and RVC at a current density of 41 mAcm􀀀 2 was below 72% after 90 min and the energy consumption increased to 612 kWhkg􀀀 1. The higher energy consumption observed during the combined process suggests that the direct degradation process at low volumetric flow rates is more efficient than the combined process.


Authors with CRIS profile

Stefan Rosiwal Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) (WTM)

Related research project(s)

Activity Electrochemical reactors with diamond electrodes for aqueous electrolytes Jan. 1, 2000 - Jan. 1, 2003

Involved external institutions

University of Southampton GB United Kingdom (GB) University of São Paulo / Universidade de São Paulo (USP) BR Brazil (BR)

How to cite

APA:

Vasconcelos, V.M., Ponce-de-León, C., Rosiwal, S., & Lanza, M.R.V. (2019). Electrochemical Degradation of Reactive Blue 19 Dye by Combining Boron-Doped Diamond and Reticulated Vitreous Carbon Electrodes. ChemElectroChem. https://doi.org/10.1002/celc.201900563

MLA:

Vasconcelos, Vanessa M., et al. "Electrochemical Degradation of Reactive Blue 19 Dye by Combining Boron-Doped Diamond and Reticulated Vitreous Carbon Electrodes." ChemElectroChem (2019).

BibTeX: Download