Simultaneous removal of chromium and leather dye from simulated tannery effluent by photoelectrochemistry

Autor(es)

Monteiro Paschoal, Fabiana Maria ^[1] ; Anderson, Marc A. ^[2] ; Zanoni, Maria Vainice B. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Inst Quim, Dept Quim Analit, BR-14801970 Araraquara, SP - Brazil

^[2] Univ Wisconsin, Environm Chem & Technol Program, Madison, WI 53706 - USA

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF HAZARDOUS MATERIALS; v. 166, n. 1, p. 531-537, JUL 15 2009.
• Citações Web of Science: 53

Resumo

The feasibility of the photobleaching of a leather acid dye, acid red 151, simultaneously to degradation of anionic surfactant, Tamol (R), and reduction of Cr(VI) to the less toxic Cr(III) was investigated by photoelectrocatalytic oxidation. The best experimental conditions were found to be pH 2.0 and 0.1 mol L(-1) sodium sulfate when the nanoporous Ti/TiO(2) photo anode was biased at +1.0V and submitted to UV-irradiation. The photoelectrocatalytic oxidation promotes 100% discoloration, reducing around 98-100% of Cr(VI) and achieving an abatement of 95% of the original total organic carbon. The effect of pH, the applied potential, the Cr(VI) concentration and the complexation reaction between Cr(VI) and acid red dye were evaluated as to their effect on the kinetics of the reaction. (C) 2008 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 04/07353-7 - Descoloracao e degradacao de corantes acidos usados em curtumes via oxidacao eletroquimica e fotoeletroquimica.
• Beneficiário: Fabiana Maria Monteiro Paschoal
• Modalidade de apoio: Bolsas no Brasil - Doutorado