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

2012; Brazilian Chemical Society; Volume: 35; Issue: 5 Linguagem: Inglês

10.1590/s0100-40422012000500013

1678-7064

Terezinha Salvador, Luiz H. Marcolino‐Júnior, Patricio Peralta‐Zamora,

Dye analysis and toxicity

ELECTRO-FENTON PROCESSES. 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 cm 2 ) and a platinum gauze anode (6 cm 2 ).Under optimal conditions (J: 1.6 mA cm -2 , Na 2 SO 4 : 0.075 mol L -1 , pH: 3) H 2 O 2 concentration of about 60 mg L -1 was observed.The addition of Fe 2+ (15 mg L -1 ) induces Fenton reactions that permit almost total decolorization of textile dyes.