THE “SONOPEROXATE” PROCESS FOR OXIDATIVE DEGRADATION OF METHYL ORANGE

Abstract

The efficiency of application of advanced oxidation processes for removal of methyl orange mono azo dye from wastewater is considered. For intensive oxidative degradation of methyl orange, it was proposed to use a combination of ultrasonic cavitation and “Peroxate” process – the “Sonoperoxate” process. Rational conditions for oxidative degradation of methyl orange at its initial concentration in an aqueous solution of 25 mg/dm3 (76.5·10-6 mol/dm3) were established: the molar ratio of methyl orange:hydrogen pero- xide:potassium metaperiodate = 1:50:10; pH of the reaction medium – 3; temperature – 293 K; specific power of cavitation ultrasonic treatment – 68 W/dm3. Under such conditions, the degradation degree of methyl orange of 89.4 % was achieved for 1800 s.