title: Influence of chloride concentration on the formation of AOX in UV oxidative system.
abstract: In this study, the effects of chloride ion concentration and pH on UV oxidation treatment were examined. Acetone and sodium dodecyl sulfate (ABS) were used as organic substances. The treatment efficiencies of these chemicals by UV/H(2)O(2) oxidation using a laboratory scale UV-free surface reactor (UV-FSR) with or without Cl(-) addition at different pH values was compared. Results of this study indicated that Cl(-) concentration and the chemical structure of the substances are more decisive than pH in the oxidation process. There was no AOX at the start of the experiments but as a result of oxidation a de novo synthesis of AOX was observed, and these AOX(de novo) compounds were destroyed during the treatment. Treatment was followed by TOC and AOX measurements. Approximately 98% and 95% TOC removal efficiencies were obtained for the treatment of acetone and ABS containing wastewaters, respectively.
authors.affiliation: Dokuz Eylül University, Engineering Faculty, Environmental Engineering Department, 35160 Izmir, Turkey. neval.baycan@deu.edu.tr
authors.forename: Neval
authors.initials: N
authors.lastname: Baycan
authors.forename: Erwin
authors.initials: E
authors.lastname: Thomanetz
authors.forename: Füsun
authors.initials: F
authors.lastname: Sengül
mesh_terms: D000096:Acetone / Q000737:chemistry*; D002712:Chlorides / Q000737:chemistry*; D006846:Hydrocarbons, Halogenated / Q000138:chemical synthesis*; D006863:Hydrogen-Ion Concentration; D010084:Oxidation-Reduction; D012967:Sodium Dodecyl Sulfate / Q000737:chemistry*; D014466:Ultraviolet Rays
chemical_list: D002712:Chlorides; D006846:Hydrocarbons, Halogenated; D000096:Acetone; D012967:Sodium Dodecyl Sulfate