Notice of RetractionDegradation of Methidathion by UV-Fenton and Solar-Fenton Processes

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

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The feasibility of employing ultraviolet light (UV) and solar light for enhanced Fenton process in degradation of methidathion has been investigated. Parameters affecting the UV-Fenton process were optimized, such as initial pH, dosages of Fenton reagents, methidathion concentration and light source. The results showed that methidathion can be effectively oxidized by UV-Fenton and solar-Fenton processes, but the reaction time of solar-Fenton process needed is longer than that of UV-Fenton. Under the following conditions: pH 3, 333 mg/L H₂O₂ and 19 mg/L FeSO₄, 100% and 98% of methidathion could be removed for 10 mg/L of methidathion after 60 min of UV and 120 min of solar light irradiation, respectively. From the economical point of view, solar light could be an interesting option for photochemical treatment of methidathion pesticide wastewater due to its low cost and the fact of being environmentally harmless.