Mineralization of Triadimefon Fungicide in Water by Electro-Fenton and Photo Electro-Fenton

Salazar, R.; Ureta-Zañartu, M. S.

Mineralization of Triadimefon Fungicide in Water by Electro-Fenton and Photo Electro-Fenton

2012

Salazar, R. | Ureta-Zañartu, M. S.

The complete mineralization of the conazole fungicide triadimefon in water at pH 3 using electrochemical advanced oxidation processes, electro-Fenton and photo electro-Fenton, was achieved. The electrochemical system consisted of a one-compartment electrochemical cell of 100Â mL provided with a glassy carbon mesh electrode (cathode) and a concentric outer steel mesh as anode. The electrolysis was realized at constant current. The most remarkable features are as follows: (1) photo electro-Fenton process reaches a complete mineralization of triadimefon after 2Â h of electrolysis with respect to electro-Fenton method; and (2) 4-chlorophenol, hydroquinone, carboxylic acids, and inorganic ions were detected as intermediates of degradation processes, which end with the complete mineralization of triadimefon to CO₂â+âH₂O. (3) A reaction pathway for the oxidation of triadimefon fungicide by hydroxyl radicals that accounts for almost all detected intermediates is proposed.

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