The purpose of this research is to study the removal of methyl orange by Fenton reaction. The optimum conditions of reaction, including reaction time, molar ratio, pH and hydrogen peroxide.The appropriate concentration of hydrogen peroxide. Ferrous sulfate and hep TA hydrate. Including the order of reaction, it was found that the optimal conditions of removal of methyl orange concentrate 200.00 mg / L with Fenton reaction is the reaction time of 40 minutes. ที่พีเอช was 3.0 molar ratio of hydrogen peroxide. Ferrous sulfate and hep TA hydrate was 1 per 0.1 and proper concentration of hydrogen peroxide. Ferrous sulfate and hep TA hydrate was 0.05, and 0.005 mol / L. Removal of 97.70 and found that the reaction is consistent with the second order reaction, which has constant rate, such as 7.58 × 10 - 2 milligrams per liter per minute.
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