Fenton-like oxidation and mineralization of phenol using synthetic Fe(II)–Fe(III) green rusts |
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Authors: | Khalil Hanna Tiangoua Kone Christian Ruby |
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Institution: | 1.Laboratoire de Chimie Physique et Microbiologie pour l’Environnement, LCPME,UMR 7564 CNRS–Université Henri Poincaré Nancy 1,Villers-les-Nancy,France |
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Abstract: | Background, aim, and scope In literature, the environmental applications of green rust (GR) have mainly been pointed out through the reduction of inorganic
contaminants and the reductive dechlorination of chlorinated organics. However, reactions involving GR for the oxidation and
mineralization of organic pollutants remain very scantly described. In this study, the ability of three synthetic Fe(II)–Fe(III)
green rusts, GR(CO32−), GR(SO42−), and GR(Cl−), to promote Fenton-like reaction was examined by employing phenol as a model pollutant. Unlike the traditional Fenton’s
reagent (dissolved Fe(II) + H2O2), where the pH values have to be lowered to less than 4, the proposed reaction can effectively oxidize the organic molecules
at neutral pH and could avoid the initial acidification which may be costly and destructive for the in situ remediation of
contaminated groundwater and soils. The green rust reactivity towards the oxidative transformation of phenol was thoroughly
evaluated by performing a large kinetic study, chemical analyses, and spectroscopic investigations. |
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