JOURNAL ARTICLE

Olive mill wastewater degradation by Fenton oxidation with zero-valent iron and hydrogen peroxide

Monem Kallel, Chokri Belaid, Rachdi Boussahel, Mohamed Ksibi, Antoine Montiel, Boubaker Elleuch
Journal of Hazardous Materials 2009 April 30, 163 (2): 550-4
18722712
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.

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