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Advanced Oxidation of Malathion as a Priority Organic Contaminants in Wastewater

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Pesticide industry wastewater treatment applying advanced oxidation process (AOP) using photo-Fenton's reagent was investigated in the bench scale experiment. During the first stage of the experiment, AOP experiments were conducted at pH 3 to determine the optimum initial ratios of chemicals, which were malathion: H2O2 = 1:100 and H2O2: Fe(II) = 40:1. Experiments were also carried out at different initial malathion concentrations to determine the reaction time for the desired effluent under the optimum conditions. It took 1 hour, 2.25 hours and 3 hours to reduce the malathion from different initial concentrations (1, 10, and 33 mg/L) to the desired level. During the second stage of study, specific energy consumption was determined to evaluate the economic feasibility of AOP combination. AOP was demonstrated to be the significant energy consumer by applying the UV light as the catalyst.
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Keywords: Energy consumption; Malathion wastewater; Photo–Fenton reaction

Document Type: Research Article

Publication date: 2011-01-01

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