title: Effects of reaction conditions on nuclear laundry water treatment in Fenton process.
abstract: This study presents the efficiency of Fenton process in the degradation of organic compounds of nuclear laundry water. The influence of Fe(2+) and hydrogen peroxide ratio, hydrogen peroxide dose, pH and treatment time were investigated. The degradation of non-ionic surfactant and other organic compounds was analysed as COD, TOC and molecular weight distribution (MWD). The most cost-effective degradation conditions were at H(2)O(2)/Fe(2+) stoichiometric molar ratio of 2 with 5 min mixing and H(2)O(2) dose of 1000 mg l(-1). With the initial pH of 6, the reductions of COD and TOC were 85% and 69%, respectively. However, the removal of the organic compounds was mainly carried out by Fenton-based Fe(3+) coagulation rather than Fenton oxidation. Fenton process proved to be much more efficient than previously performed ozone-based oxidation processes.
authors.affiliation: Laboratory of Applied Environmental Chemistry, University of Kuopio, Mikkeli, Finland. Miia.Vilve@uku.fi
authors.forename: Miia
authors.initials: M
authors.lastname: Vilve
authors.forename: Arja
authors.initials: A
authors.lastname: Hirvonen
authors.forename: Mika
authors.initials: M
authors.lastname: Sillanpää
mesh_terms: D003362:Cost-Benefit Analysis; D006861:Hydrogen Peroxide; D006863:Hydrogen-Ion Concentration; D007501:Iron; D007846:Laundering; D009930:Organic Chemicals / Q000302:isolation & purification*; D013997:Time Factors; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods*
chemical_list: C045076:Fenton's reagent; D009930:Organic Chemicals; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide; D007501:Iron