Fosetyl-Al photo-Fenton degradation and its endogenous catalyst inhibition

Journal of Hazardous Materials
María M MicóC Sans

Abstract

Interferences from many sources can affect photo-Fenton reaction performance. Among them, catalyst inhibition can be caused by the complexation and/or precipitation of iron species by the organic matter and salts present in the reaction media. This is the case of the oxidation of effluents containing organophosphorous fosetyl-Al. The degradation of this fungicide generates phosphate anions that scavenge iron and hinder Fe(II) availability. Experimental design was applied to artificially enlighten photo-Fenton reaction, in order to evaluate fosetyl-Al degradation. The performed experiments suggested how iron inhibition takes place. The monitoring of photo-Fenton reaction over a mixture of fosetyl-Al with other two pesticides also showed the interferences caused by the presence of the fungicide on other species degradation. Solar empowered photo-Fenton was also essayed for comparison purposes. Artificial and solar light photo-Fenton reactions were revealed as effective treatments for the elimination of tested fungicide. However, the phosphate ions generated during fosetyl oxidation decreased iron availability, what hampered organic matter degradation.

References

Jul 10, 2003·Journal of Agricultural and Food Chemistry·Juan V SanchoFélix Hernández
Feb 21, 2004·Water Research·M KositziA Campos
Jun 2, 2007·Journal of Hazardous Materials·Oscar GonzálezSantiago Esplugas
Nov 4, 2010·Water Science and Technology : a Journal of the International Association on Water Pollution Research·María M MicóCarme Sans
May 29, 2012·Journal of Hazardous Materials·Marco S LucasSixto Malato

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Citations

Nov 24, 2016·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Guanglong LiuDuanwei Zhu

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