Degradação de corantes têxteis e remediação de resíduos de tingimento por processos Fenton, foto-Fenton e eletro-Fenton

• Main Authors: Terezinha Salvador, Luiz H. Marcolino Jr., Patricio Peralta-Zamora
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2012-01-01
• Series: Química Nova
• Subjects: textile dyes; degradation; electro-Fenton
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422012000500013&lng=en&tlng=en

In this work the degradation of textile dyes were evaluated, using Fenton, photo-Fenton and electro-Fenton processes. Under optimized conditions Fenton and photo-Fenton processes showed high decolorization capacity of the model dyes. The electro-Fenton process was carried out in an undivided electrochemical reactor (1000 mL) equipped with a carbon-felt cathode (253 cm²) and a platinum gauze anode (6 cm²). Under optimal conditions (J: 1.6 mA cm-2, Na2SO4: 0.075 mol L-1, pH: 3) H2O2 concentration of about 60 mg L-1 was observed. The addition of Fe2+ (15 mg L-1) induces Fenton reactions that permit almost total decolorization of textile dyes.