Application of Fenton oxidation to cosmetic wastewaters treatment

• Published in: Journal of hazardous materials 2007-05, Vol.143 (1), p.128-134
• Main Authors: Bautista, P., Mohedano, A.F., Gilarranz, M.A., Casas, J.A., Rodriguez, J.J.
• Format: Article
• Language: English
• Subjects: Applied sciences; Chemical engineering; Cosmetic wastewater; Cosmetics; Exact sciences and technology; Fenton's reagent; General purification processes; Hydrogen Peroxide - chemistry; Hydrogen-Ion Concentration; Industrial Waste; Iron - chemistry; Kinetics; Oxidation; Oxidation-Reduction; Pollution; Reactors; Sewerage works: sewers, sewage treatment plants, outfalls; Temperature; Waste Disposal, Fluid - methods; Wastewaters; Water treatment and pollution
• ISSN: 0304-3894; 1873-3336
• DOI: 10.1016/j.jhazmat.2006.09.004

The removal of organic matter (TOC and COD) from a cosmetic wastewater by Fenton oxidation treatment has been evaluated. The operating conditions (temperature as well as ferrous ion and hydrogen peroxide dosage) have been optimized. Working at an initial pH equal to 3.0, a Fe 2+ concentration of 200 mg/L and a H 2O 2 concentration to COD initial weight ratio corresponding to the theoretical stoichiometric value (2.12), a TOC conversion higher than 45% at 25 °C and 60% at 50 °C was achieved. Application of the Fenton oxidation process allows to reach the COD regional limit for industrial wastewaters discharges to the municipal sewer system. A simple kinetic analysis based on TOC was carried out. A second-order equation describes well the overall kinetics of the process within a wide TOC conversion range covering up to the 80–90% of the maximum achievable conversion.