Electrochemically-driven mineralization of Reactive Blue 4 cotton dye: On the role of in situ generated oxidants

Autor(es)

Nakamura, Karen Christine ^[1] ; Guimaraes, Luciana Silva ^[1] ; Magdalena, Aroldo G. ^[2] ; Dias Angelo, Antonio Carlos ^[2] ; De Andrade, Adalgisa R. ^{[3, 4]} ; Garcia-Segura, Sergi ^[5] ; Pipi, Angelo R. F. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sagrado Coracao, Proreitoria Pesquisa & Posgrad PRPPG, Rua Irma Arminda 10-50, BR-17011160 Bauru, SP - Brazil

^[2] Sao Paulo State Univ UNESP, Sch Sci, Dept Chem, Campus Bauru, Bauru, SP - Brazil

^[3] Unesp, Natl Inst Alternat Technol Detect Toxicol Evaluat, Inst Chem, POB 355, BR-14800900 Araraquara, SP - Brazil

^[4] Univ Sao Paulo, FFCLRP, Lab Eletrocatalise & Eletroquim Ambiental, Dept Quim, Av Bandeirantes 3900, BR-14040901 Ribeirao Preto, SP - Brazil

^[5] Arizona State Univ, Sch Sustainable Engn & Built Environm, Nanosyst Engn Res Ctr Nanotechnol Enabled Water T, Tempe, AZ 85287 - USA

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ELECTROANALYTICAL CHEMISTRY; v. 840, p. 415-422, MAY 1 2019.
• Citações Web of Science: 0

Resumo

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. Electra-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. (AU)

• Processo FAPESP: 17/12788-2 - Método eletro-Fenton na ausência e presença de luz UV empregado na degradação do corante azul reativo 4 utilizando ânodo ADE e cátodo de difusão gasosa
• Beneficiário: Karen Christine Nakamura
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica