Catalytic oxidation of triclosan in water by pyrite and hydrogen peroxide
黄铁矿催化H2O2氧化降解水中三氯生

The treatment of pollutants through a heterogeneous Fenton-like oxidation process using pyrite catalyst by employing the triclosan as model contaminants as well as the characterization of pyrite using SEM and EDS techniques was investigated.A series of experiments were conducted to elucidate the influence of significant parameters on the oxidation system,such as catalyst dosage,initial H2O2 concentration,initial pH of the reaction medium and reaction time etc.Results indicate that the catalyst shows high activity in terms of triclosan removal.The removal rate of triclosan could be over 90% within 10 min of reaction at pH 8 when the initial concentration of H2O2 and pyrite dosage were 5 mg/L and 0.1 g/L,respectively.The effect of pH on this heterogeneous reaction is much weaker than that on traditional Fenton reagent.And the high activity of catalyst can be kept constant with the pH value ranging from 2 to 10.Reaction intermediates including 2,4-dichlorophen,formed in the degradation of triclosan were identified by GC-MS.