title: Ultrasound-assisted Fenton process using siderite nanoparticles prepared via planetary ball milling for removal of reactive yellow 81 in aqueous phase.
abstract: Nano-sized siderite was used as catalyst for the heterogeneous Fenton process combined with ultrasonic irradiation to degrade reactive yellow 81 (RY-81) in the aqueous phase. As the most efficient process, nano-sized siderite prepared via ball milling was chosen to carry out the experiments. 6h milled siderite at initial pH of 3.0 led to the highest removal efficiency of 92.09% within the reaction time of 30min. At a short reaction time of 20min, increasing siderite nanoparticles dosage from 0.3 to 0.75g/L resulted in increasing removal efficiency from 49.82 to 79.86%, respectively, while further increase in the dosage caused a substantial decrease in the efficiency. In the case of the effect of solute concentration, increasing the dye up to 400mg/L led to a significant decrease in the removal efficiency (65.77%). The presence of 0.01M Na2CO3and C2H5OH significantly diminished the decolorization efficiency of RY-81 (<10%) with initial concentration of 100mg/L. The intermediates produced during the treatment process were also identified using GC-MS analysis. This research suggested that ball milled siderite is a potential catalyst for the efficient decolorization of textile effluents via ultrasound-assisted Fenton process.
authors.affiliation: Department of Petroleum and Natural Gas Engineering, Oltu Faculty of Earth Sciences, Atatürk University, 25240 Erzurum, Turkey.
authors.forename: Ozkan
authors.initials: O
authors.lastname: Acisli
authors.affiliation: Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran; Department of Materials Science and Nanotechnology, Near East University, 99138 Nicosia, North Cyprus, Mersin 10, Turkey. Electronic address: a_khataee@tabrizu.ac.ir.
authors.forename: Alireza
authors.initials: A
authors.lastname: Khataee
authors.affiliation: Department of Environmental Health Engineering, School of Health, Arak University of Medical Sciences, 3819693345 Arak, Iran.
authors.forename: Reza
authors.initials: R
authors.lastname: Darvishi Cheshmeh Soltani
authors.affiliation: Department of Chemistry, Faculty of Science, Atatürk University, 25240 Erzurum, Turkey.
authors.forename: Semra
authors.initials: S
authors.lastname: Karaca
keywords: Fenton process; Siderite nanostructures; Sonocatalysis; Textile dye; Ultrasound