@Article{VasconcelosRMASBFL:2015:ElReRe,
author = "Vasconcelos, Vanessa Moura and Ribeiro, Francine L. and
Migliorini, Fernanda Lanzoni and Alves, Suellen A. and Steter,
Juliana A. and Baldan, Maur{\'{\i}}cio Ribeiro and Ferreira,
Neiden{\^e}i Gomes and Lanza, Marcos R. V.",
affiliation = "{Universidade de S{\~a}o Paulo (USP)} and {Centro
Universit{\'a}rio Central Paulista} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Universidade Federal de S{\~a}o
Carlos (UFSCar)} and {Universidade de S{\~a}o Paulo (USP)} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Universidade de
S{\~a}o Paulo (USP)}",
title = "Electrochemical removal of Reactive Black 5 azo dye using
non-commercial boron-doped diamond film anodes",
journal = "Electrochimica Acta",
year = "2015",
volume = "178",
pages = "484--493",
month = "Oct.",
keywords = "Boron-doped diamond electrode, Degradation route,
Electro-oxidation, Reactive Black 5 dye.",
abstract = "Although various processes for the removal of Reactive Black 5
(RB5) dye from textile wastewater have been studied, the
degradation pathway of RB5 on boron-doped diamond (BDD) films has
not been elucidated. We here report the efficient
electro-oxidation of RB5 in aqueous solution using BDD/Ti
electrodes and we propose a degradation route based on
intermediates and byproducts identified by high performance liquid
chromatography-mass spectrometry. BDD films doped with 5000 or
15,000 ppm of B were grown on Ti plates using the hot filament
chemical vapor technique to produce electrodes E1 and E2,
respectively. Films were evaluated by scanning electron
microscopy, X-ray diffraction and Raman spectroscopy before and
after several hours of electrolysis and were shown to be of high
quality and stability. Total removal of color from RB5 solution
was achieved with either electrode by electrolysis at low current
density (50 mA cm\−2). Total mineralization of the dye
solution could be attained with electrode E2 at an applied current
density of 100 mA cm\−2. Under these conditions, 91% of the
chromatographic area associated with RB5 (monitored at 311 nm) was
removed, thereby verifying cleavage of the aromatic rings of the
dye. Furthermore decolorization of RB5 followed pseudo zero-order
kinetics with both electrodes and the apparent rate constant was
higher with electrode E2. The results obtained indicate that
BDD/Ti is a promising material for the electro-degradation of RB5
since aromatic rings and chromophoric groups were ruptured during
electrolysis to generate aliphatic compounds, such as oxalic acid,
that can be easily converted into CO2.",
doi = "10.1016/j.electacta.2015.07.133",
url = "http://dx.doi.org/10.1016/j.electacta.2015.07.133",
issn = "0013-4686",
language = "en",
targetfile = "vasconcelos_electrochemical.pdf",
urlaccessdate = "29 jun. 2024"
}