TY - JOUR
T1 - Electrochemically-driven mineralization of Reactive Blue 4 cotton dye
T2 - On the role of in situ generated oxidants
AU - Nakamura, Karen Christine
AU - Guimarães, Luciana Silva
AU - Magdalena, Aroldo G.
AU - Angelo, Antonio Carlos Dias
AU - De Andrade, Adalgisa R.
AU - GARCIA SEGURA, Sergio
AU - Pipi, Angelo R.F.
N1 - Funding Information:
K.C. Nakamura and L.S. Guimarães acknowledge the support of CAPES and FAPESP (processo 2017/12788-2 ).
Funding Information:
The research team acknowledge the financial support provided by the Brazilian funding agencies including the Brazilian National Council for Scientific and Technological Development - CNPq (grant no. 465571/2014-0 ); São Paulo Research Foundation (FAPESP grant 50945-4 ) and the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Brasil (CAPES) Finance Code 001 .
Funding Information:
The research team acknowledge the financial support provided by the Brazilian funding agencies including the Brazilian National Council for Scientific and Technological Development - CNPq (grant no. 465571/2014-0); São Paulo Research Foundation (FAPESP grant 50945-4) and the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Brasil (CAPES) Finance Code 001. K.C. Nakamura and L.S. Guimarães acknowledge the support of CAPES and FAPESP (processo 2017/12788-2).
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/5/1
Y1 - 2019/5/1
N2 - Brazil is the fifth biggest global manufacturer of textiles and the fourth in cotton textile exports. Textile effluents contain organic dyes that are highly recalcitrant and difficult to oxidize by conventional physico-chemical and biological treatments. Mid-sized textile factories require reliable water treatment technologies of small physical foot-print that do no produce solid wastes to treat their manufacturing effluents. Electrochemically-driven technologies emerge as feasible alternative technologies that overcome barriers in the management of these industrial effluents. This work studies the application of electrochemical advanced oxidation processes on the treatment of dye bath effluents containing cotton dye Reactive Blue 4. Electro-Fenton treatment attains complete color removal with an electrical energy per order (E EO ) of 7.4 kWh m −3 order −1 , which represents an order of magnitude lower operational expenditure than electrochemical oxidation (54.8 kWh m −3 order −1 ). Simultaneous irradiation with UVA light in photoelectron-Fenton systems did not show any effect on RB4 degradation kinetics. But UVA irradiation increased the mineralization achieved after treatment, which enhanced current efficiencies ca. 2-fold respect to electro-Fenton.
AB - Brazil is the fifth biggest global manufacturer of textiles and the fourth in cotton textile exports. Textile effluents contain organic dyes that are highly recalcitrant and difficult to oxidize by conventional physico-chemical and biological treatments. Mid-sized textile factories require reliable water treatment technologies of small physical foot-print that do no produce solid wastes to treat their manufacturing effluents. Electrochemically-driven technologies emerge as feasible alternative technologies that overcome barriers in the management of these industrial effluents. This work studies the application of electrochemical advanced oxidation processes on the treatment of dye bath effluents containing cotton dye Reactive Blue 4. Electro-Fenton treatment attains complete color removal with an electrical energy per order (E EO ) of 7.4 kWh m −3 order −1 , which represents an order of magnitude lower operational expenditure than electrochemical oxidation (54.8 kWh m −3 order −1 ). Simultaneous irradiation with UVA light in photoelectron-Fenton systems did not show any effect on RB4 degradation kinetics. But UVA irradiation increased the mineralization achieved after treatment, which enhanced current efficiencies ca. 2-fold respect to electro-Fenton.
KW - Anodic oxidation
KW - Electro-Fenton
KW - Electrochemical advanced oxidation processes
KW - Water treatment
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U2 - 10.1016/j.jelechem.2019.04.016
DO - 10.1016/j.jelechem.2019.04.016
M3 - Article
AN - SCOPUS:85064081307
SN - 1572-6657
VL - 840
SP - 415
EP - 422
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
ER -