Removal of chlorothalonil, methyl parathion and methamidophos from water by the Fenton reaction.
The efficiency of a dark Fenton system (H2O2/Fe2+) to remove chlorothalonil from water, alone and in the presence of the organophosphorous pesticides methyl parathion and methamidophos, was evaluated. Here we show that the process is rapid and efficient. Nearly complete degradation of chlorothalonil and methyl parathion (98%) was observed in less than 10 min whereas methamidophos showed similar levels of efficiency only after 40 to 90 min. Formulating agents did not appear to impair the degradation of active ingredients. Interactions during the degradation of mixtures of the three pesticides only appeared to affect methamidophos degradation.
Gutiérrez
R F
RF
Instituto Tecnológico de Tapachula, Carretera a Puerto Madero Km. 2.0, C.P. 30700, Tapachula, Chiapas, Mexico.
Santiesteban
A
A
Cruz-López
L
L
Bello-Mendoza
R
R
D005069:Evaluation Studies as Topic; D006861:Hydrogen Peroxide / Q000032:analysis / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D008743:Methyl Parathion / Q000032:analysis / Q000737:chemistry; D009570:Nitriles / Q000032:analysis / Q000737:chemistry; D009946:Organothiophosphorus Compounds / Q000032:analysis / Q000737:chemistry; D010100:Oxygen / Q000032:analysis; D010575:Pesticides / Q000032:analysis / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
C045076:Fenton's reagent; D009570:Nitriles; D009946:Organothiophosphorus Compounds; D010575:Pesticides; D014874:Water Pollutants, Chemical; D008743:Methyl Parathion; C014655:methamidophos; D006861:Hydrogen Peroxide; D007501:Iron; C005806:tetrachloroisophthalonitrile; D010100:Oxygen