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    Adsorption of reactive blue 114 dye by using a new adsorbent: Pomelo peel
    (Elsevier Science Inc, 2014) Argun, Mehmet Emin; Güçlü, Dünyamin; Karataş, Mustafa
    This paper describes the removal of Reactive Blue 114 dye from aqueous solutions by using pomelo (Citrus grandis) peel. Pomelo peel can be described as a new, low cost, abundantly available adsorbent. The optimum adsorbent mass, dye concentration, contact time and pH were determined in this study. The parameters of Langmuir, Freundlich and Temkin adsorption isotherms were also obtained using concentrations of the dyes ranging from 1.0 to 200 mg/L. Maximum adsorption capacity was obtained as 16 mg/g at pH 2 and 303 K solution temperature. The adsorption process was observed to be reaching equilibrium after about 90 min. (C) 2013 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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    Application of Fenton process for decolorization of reactive black 5 from synthetic wastewater: Kinetics and thermodynamics
    (Wiley-Blackwell, 2011) Argun, Mehmet Emin; Karataş, Mustafa
    The decolorization and degradation efficiency of the azo dye Reactive Black 5 (RB5) by Fenton system were investigated in this study. The operation parameters such as Fe2+:H2O2 ratio, pH value, initial concentration of RB5, reaction time, and temperature were examined. Maximum decolorization (99%) and degradation (88% COD removal) efficiencies were achieved at the Fe2+:H2O2 ratio of 0.05 and pH 3 for 15-min reaction time. The decolorization kinetic of RB5 followed pseudo-second-order reaction kinetic. The increase of temperature caused decreasing of obtained rate constants and increasing of corresponding half-lives. The article also discussed thermodynamic parameters including changes in Gibbs free energy, enthalpy, and entropy for the decolorization of RB5 by Fenton and exposed that the oxidation process was spontaneous and exothermic under natural conditions. (c) 2010 American Institute of Chemical Engineers Environ Prog, 2010
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    Decolorization of antraquinonic dye, Reactive Blue 114 from synthetic wastewater by Fenton process: Kinetics and thermodynamics
    (Elsevier, 2012) Karataş, Mustafa; Argun, Yusuf Alparslan; Argun, Mehmet Emin
    In this work, the decolorization of C.I. Reactive Blue 114 (RB114), a commercially important anthraquinonic dye, by Fenton processes was investigated. The effects of operating parameters, such as Fe 2+:H 2O 2 ratio, pH value, reaction time and temperature were examined. Maximum decolorization (86%) efficiencies were achieved at the Fe 2+:H 2O 2 ratio of 0.1 and pH 3 for 20min reaction time. The decolorization kinetic of RB114 followed pseudo-second-order reaction kinetic. The paper also discussed thermodynamic parameters including changes in Gibbs free energy, and activation energy for the decolorization of RB114 by Fenton and exposed that the oxidation process was spontaneous under natural conditions.
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    Optimization of landfill leachate oxidation at extreme conditions and determination of micropollutants removal
    (Desalination Publications, 2017) Argun, Mehmet Emin; Alver, Alper; Karataş, Mustafa
    The advanced oxidation of macro- and micro-organic pollutants from the landfill leachate using the Fenton reaction was investigated. Central composite design with response surface methodology was applied to evaluate the interaction and relationship between operating variables (i.e., pH, reaction time, ferrous iron and H2O2 dosages) and to develop the optimum operating condition. Based on statistical analysis, quadratic models for the two responses (chemical oxygen demand [COD] and aromatic content [UV254]) proved to be significant with very low probability values (<0.001). The obtained optimum conditions were 1,755 mg/L Fe2+ and 26,422 mg/L H2O2 concentration, pH 3.72 and 99 min reaction time. The results obtained by the predicted model were 70, and 54% removal for COD and UV254, respectively, with optimum conditions. The predicted results fitted well with the results of the laboratory experiment. A wide range of analysis was conducted for micropollutants and some volatile organic compounds, pharmaceuticals, pesticides, plasticizers, polycyclic aromatic hydrocarbons and heavy metals were detected. Removal efficiencies of some micropollutants including bis(2-ethylhexyl)phthalate, anthracene, benzene hexachloride, dieldrin, diuron, chlorpyriphos and diclofenac were between 90% and 99% with Fenton oxidation at the optimum condition. It was also determined that heavy metals decreased as a result of co-precipitation after oxidation.
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    Treatment of mineral-oil recovery industry wastewater by sequential aeration and Fenton's oxidation process
    (2010) Argun, Mehmet Emin; Karataş, Mustafa; Dursun, Şükrü
    This study describes the treatment of preliminary aerated mineral-oil recovery industry wastewater (MORIW) using Fenton's reagent. Application parameters such as Fe2+ and H2O2 concentration, pH value, reaction period, temperature, and sludge characteristics were examined. Maximum oxidation efficiency (about 90 % COD removal and 80 % UV 254 removal) was achieved at the conditions of 0.003 Fe 2+:H2O2 ratio, 180 min reaction period, pH 3 and 293 K temperature. The oxidation process of MORIW followed pseudo-second-order reaction kinetic. The studied sludge character has a high density with settling velocity. In addition, the high settlement rate (SR) and liquid/solid ratio (L/S) values demonstrated that the formed sludge was suitable for dewatering and drying processes.