The University of Southampton
University of Southampton Institutional Repository

Electrochemical degradation of Reactive Blue 19 dye by combining boron doped diamond and reticulated vitreous carbon electrodes

Electrochemical degradation of Reactive Blue 19 dye by combining boron doped diamond and reticulated vitreous carbon electrodes
Electrochemical degradation of Reactive Blue 19 dye by combining boron doped diamond and reticulated vitreous carbon electrodes
Reactive Blue 19 (RB-19) dye has 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 long time causing serious environmental problems if not removed. This study reports the degradation of RB-19 by: 1) the electrochemical direct degradation with Boron-Doped Diamond (BDD) electrodes and 2) a combined processes using BDD and Reticulated Vitreous Carbon (RVC) electrodes that generates H2O2. The direct degradation uses different current densities and concentrations. High currents densities, longer electrolysis time and low volumetric flow rates, favour RB-19 degradation removing total colour and 100 % TOC at 5 and 60 min respectively. At 41 mA cm-2 current density and 20 dm3 h-1 volumetric flow rate, the energy consumption to degrade 20 mg dm-3 of RB-19 was 279 kWh kg-1. The TOC removal of RB-19 dye combining BDD and RVC at a current density of 41 mA cm-2 was below 72% during 90 min and the energy consumption increased to 612 kWh kg-1. The higher energy consumption obtained during the combined process suggested that the direct degradation process at low volumetric flow rates is more efficient than the combined process.
boron- doped diamond; electrochemical oxidation; filter-press flow reactor; H2O2 electrogeneration; reactive blue 19 dye; reticulated vitreous carbon
3516-3524
Ponce De Leon, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Vasconcelos, Vanessa M.
ed5d7911-79c3-47e2-b129-1ca59fae627f
Rosiwal, Stefan
a9289623-ffd3-4975-ac52-aa258f19c1f4
Lanza, Marcos R.V.
cbf2c772-89be-411d-b3f0-0c835fd5300a
Ponce De Leon, Carlos
508a312e-75ff-4bcb-9151-dacc424d755c
Vasconcelos, Vanessa M.
ed5d7911-79c3-47e2-b129-1ca59fae627f
Rosiwal, Stefan
a9289623-ffd3-4975-ac52-aa258f19c1f4
Lanza, Marcos R.V.
cbf2c772-89be-411d-b3f0-0c835fd5300a

Ponce De Leon, Carlos, Vasconcelos, Vanessa M., Rosiwal, Stefan and Lanza, Marcos R.V. (2019) Electrochemical degradation of Reactive Blue 19 dye by combining boron doped diamond and reticulated vitreous carbon electrodes. ChemElectroChem, 6 (13), 3516-3524, [201900563R1]. (doi:10.1002/celc.201900563).

Record type: Article

Abstract

Reactive Blue 19 (RB-19) dye has 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 long time causing serious environmental problems if not removed. This study reports the degradation of RB-19 by: 1) the electrochemical direct degradation with Boron-Doped Diamond (BDD) electrodes and 2) a combined processes using BDD and Reticulated Vitreous Carbon (RVC) electrodes that generates H2O2. The direct degradation uses different current densities and concentrations. High currents densities, longer electrolysis time and low volumetric flow rates, favour RB-19 degradation removing total colour and 100 % TOC at 5 and 60 min respectively. At 41 mA cm-2 current density and 20 dm3 h-1 volumetric flow rate, the energy consumption to degrade 20 mg dm-3 of RB-19 was 279 kWh kg-1. The TOC removal of RB-19 dye combining BDD and RVC at a current density of 41 mA cm-2 was below 72% during 90 min and the energy consumption increased to 612 kWh kg-1. The higher energy consumption obtained during the combined process suggested that the direct degradation process at low volumetric flow rates is more efficient than the combined process.

Text
Electrochemical degradation of Reactive Blue 19 dye - Accepted Manuscript
Download (500kB)

More information

Accepted/In Press date: 6 May 2019
e-pub ahead of print date: 13 May 2019
Published date: 1 July 2019
Keywords: boron- doped diamond; electrochemical oxidation; filter-press flow reactor; H2O2 electrogeneration; reactive blue 19 dye; reticulated vitreous carbon

Identifiers

Local EPrints ID: 431488
URI: http://eprints.soton.ac.uk/id/eprint/431488
PURE UUID: 3adaf822-dc99-4e1d-bc16-0264cefe1c10
ORCID for Carlos Ponce De Leon: ORCID iD orcid.org/0000-0002-1907-5913

Catalogue record

Date deposited: 05 Jun 2019 16:30
Last modified: 07 Oct 2020 06:31

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×