Olive mill wastewater degradation by Fenton oxidation with zero-valent iron and hydrogen peroxide.
The degradation of olive mill wastewater (OMW) with hydroxyl radicals generated from zero-valent iron and hydrogen peroxide has been investigated by means of chemical oxygen demand (COD) and phenolic compounds analyses. The effects of the H2O2 dose, the pH and the organic matter concentration have been studied. The optimal experimental conditions were found to have continuous presence of iron metal, acid pH (2.0-4.0), and relatively concentrated hydrogen peroxide (9.5M). Coloration of OMW disappeared and phenolic compound decreased to 50% of initial concentration after 3h reaction time. The application of zero-valent Fe/H2O2 procedure permitted high removal efficiencies of pollutants from olive mill wastewater. The results show that zero-valent Fe/H2O2 could be considered as an effective alternative solution for the treatment of OMW or may be combined with a classical biological process to achieve high quality of effluent water.
Kallel
Monem
M
Laboratoire Eau-Energie-Environnement (Lab. 3E), Université de Sfax, E.N.I.S., B.P. W 3038, Sfax, Tunisia. monem.kallel@enis.rnu.tn
Belaid
Chokri
C
Boussahel
Rachdi
R
Ksibi
Mohamed
M
Montiel
Antoine
A
Elleuch
Boubaker
B
D005525:Food-Processing Industry; D006861:Hydrogen Peroxide; D017665:Hydroxyl Radical; D007220:Industrial Waste; D007501:Iron; D031658:Olea; D010084:Oxidation-Reduction; D014874:Water Pollutants, Chemical / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods*
D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D017665:Hydroxyl Radical; D006861:Hydrogen Peroxide; D007501:Iron