Effects of reaction conditions on nuclear laundry water treatment in Fenton process.
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.
Vilve
Miia
M
Laboratory of Applied Environmental Chemistry, University of Kuopio, Mikkeli, Finland. Miia.Vilve@uku.fi
Hirvonen
Arja
A
Sillanpää
Mika
M
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*
C045076:Fenton's reagent; D009930:Organic Chemicals; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide; D007501:Iron