Degrada？？o de corantes têxteis e remedia？？o de resíduos de tingimento por processos Fenton, foto-Fenton e eletro-Fenton

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.