Baştürk, EmineKarataş, Mustafa13.07.20192019-07-2913.07.20192019-07-2920141350-41771873-2828https://doi.org/10.1016/j.ultsonch.2014.03.026https://hdl.handle.net/20.500.12451/5537In this work, the decolorization of C.I. Reactive Blue 181 (RB181), an anthraquinone dye, by Ultrasound and Fe2+ H2O2 processes was investigated. The effects of operating parameters, such as Fe2+ dosage, H2O2 dosage, pH value, reaction time and temperature were examined. Process optimisation [pH, ferrous ion (Fe2+), hydrogen peroxide (H2O2), and reaction time], kinetic studies and their comparison were carried out for both of the processes. The Sono-Fenton process was performed by indirect sonication in an ultrasonic water bath, which was operated at a fixed 35-kHz frequency. The optimum conditions were determined as [Fe2+] = 30 mg/L, [H2O2] = 50 mg/L and pH = 3 for the Fenton process and [Fe2+] = 10 mg/L, [H2O2] = 40 mg/L and pH = 3 for the Sono-Fenton process. The colour removals were 88% and 93.5% by the Fenton and Sono-Fenton processes, respectively. The highest decolorization was achieved by the Sono-Fenton process because of the production of some oxidising agents as a result of sonication. The paper also discussed kinetic parameters. The decolorization kinetic of RB181 followed pseudo-second-order reaction (Fenton study) and Behnajady kinetics (Sono-Fenton study). (C) 2014 Elsevier B.V. All rights reserved.eninfo:eu-repo/semantics/embargoedAccessSono-Fenton ProcessAnthraquinone DyeReactive Blue 181DecolorizationSonicationArticle2151881188510.1016/j.ultsonch.2014.03.02624746036Q1WOS:000337776800035N/A