Fe(III)-EDTA complex abatement using a catechol driven Fenton reaction combined with a biological treatment.
A combined chemical oxidation (catechol-driven Fenton reaction) followed by a biological treatment was used to degrade Fe(III)-EDTA (1.34 mM). The chemical treatment was inspired in fungal non-enzymatic wood rot mechanisms that use dihydroxybenzens in order to promote the Fenton reaction to breakdown wood structures. This chemical pre-oxidation used catechol (50 microM) and H202 (20 mM) and the reaction products were identified by GC-MS. In addition, a biological treatment was coupled using the baker's yeast Saccharomyces cerevisiae. The combined chemical biological treatment achieved 100% EDTA degradation, 68 % total organic carbon removal and 90% iron removal.
Oviedo
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Renewable Resources Laboratory, Casilla 160-C, Universidad de Concepción, Concepción, Chile.
Contreras
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Freer
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Rodríguez
J
J
D001673:Biodegradation, Environmental; D002614:Chelating Agents / Q000737:chemistry*; D004492:Edetic Acid / Q000737:chemistry* / Q000378:metabolism; D005658:Fungi; D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry* / Q000378:metabolism; D016877:Oxidants / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
D002614:Chelating Agents; C045076:Fenton's reagent; D016877:Oxidants; D004492:Edetic Acid; D006861:Hydrogen Peroxide; D007501:Iron