title: Naval derusting wastewater containing high concentration of iron, treated in UV photo-Fenton-like oxidation.
abstract: The UV photooxidation with Fe(III) and H2O2 was employed to treat a naval derusting wastewater, which contains the high COD (chemical oxygen demand) and various metal concentrations exceptionally with high concentrations of citric acid and iron. Because of its iron containment, the Fenton-like reaction automatically took place with the added amount of H2O2. The decomposition rate was found in a sequence of: UV/H2O2/Fe(III) > UV/H2O2 > Fe(II)/H2O2. Two H2O2 injection methods, single and multiple points, were evaluated. The multiple-point H202 injection was more efficient to decompose the citric acid. The decomposition of the synthetic citric acid and the real derusting citric acid wastewater was also compared. The 93% COD reduction of the derusting wastewater was achieved using the UV/H2O2/Fe(III) treatment.
authors.affiliation: Sonny Astani Department of Civil and Environmental Engineering, Viterbi School of Engineering, University of Southern California, KAP 210, 3620 South Vermont Avenue, Los Angeles, CA 90089, USA. derekkim10@yahoo.com
authors.forename: Daeik
authors.initials: D
authors.lastname: Kim
authors.forename: Jason Kou-Chaw
authors.initials: JK
authors.lastname: Chen
authors.forename: Teh Fu
authors.initials: TF
authors.lastname: Yen
mesh_terms: D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D010084:Oxidation-Reduction; D010777:Photochemistry / Q000379:methods; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification
chemical_list: C045076:Fenton's reagent; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide; D007501:Iron