Abstrato

Effective Degradation of an Azo Dye Acid Red -183 By Fenton and Photo-Fenton Treatment

A. Rajendran* and C. Karthikeyan

Among the available advanced oxidation processes, Fenton and photo-Fenton processes are of special interest because they make possible achievement of high reaction yields with a low treatment cost. Fenton and photo-Fenton reactions as stand-alone processes and as pretreatment of an aerobic biological treatment for acid red-183 reactive dye degradation have been carried out at pilot plant scale. Photo-Fenton oxidation was conducted using a compound parabolic collector (CPC) solar photo-reactor. When applying photo-Fenton reaction as a single process, 10 mg/L-1 Fe (II) and 250 mg/L-1H₂O₂ for 250 mg/L-1, acid red-131 treatment, and 20 mg/L^-1Fe (II) and 500 mg/L-1H₂O₂ for 250 mg/L^-1 acid red-131 treatments closely reproduced the laboratory mineralization results, with 85 and 90 % dissolved organic carbon (DOC) removal respectively