Decolorization kinetics of Procion H-exl dyes from textile dyeing using Fenton-like reactions

摘要: The decolorization kinetics of three commercially used Procion H-exl dyes was studied using a Fenton-like reagent. effect the major system parameters (pH, concentration H(2)O(2) and Fe(3+) initial dye concentration) on determined. For comparison, use UV irradiated reagent Fenton also examined. In addition, mineralization rates biodegradability improvement as well addition Cl(-), CO(3)(2-) or HCO(3)(-) studied. reactions were carried out in 300 ml stirred cylindrical reactor with capability irradiation. half-life time goes through minimum respect to solution pH between 3 4. It exhibits broad at molar ratios H(2)O(2)/Fe(3+) from about 100 10. substantially reduces rates, while this is significantly less pronounced Cl(-). At an optimum range parameters, rate (TOC reduction) very slow for process decrease 49.5 41.1 mg/l after 30 min only 35.2 600 min), but it increases photo-Fenton-like (to TOC values 39.7 11.4 mg/l, respectively). biodegradability, expressed by BOD/COD ratio, value 0.11-0.55 0.72 processes.