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Öğe Activation of pine cone using Fenton oxidation for Cd(II) and Pb(II) removal(ELSEVIER SCI LTD, 2008) Argun, Mehmet Emin; Dursun, Sukru; Karatas, Mustafa; Guru, MetinThis paper describes activation of pine cone with Fenton reagent and determines the removal of Cd(II) and Pb(II) ions from aqueous Solution. Changes of the Surface properties of adsorbent materials were determined by the FT-IR and SEM analysis after activation of pine cone. The effect of Fe2+/H2O2 ratio, ORP, pH and contact time were determined. Different adsorption isotherms were also obtained using concentrations of heavy metal ions ranging from 0.1 to 150 mg L-1. The adsorption process follows pseudo-first-order reaction kinetics and follows the Langmuir adsorption isotherm. The study discusses thermodynamic parameters, including changes in Gibbs free energy, entropy, and enthalpy, for the adsorption of Cd(II) and Pb(II) on activated cone, and revealed that the adsorption process was spontaneous and exothermic under natural conditions. The maximum removal efficiencies were obtained as 91% and 89% at pH 7 with 90 and 105-min contact time for Cd(II) and Pb(II), respectively. (c) 2008 Elsevier Ltd. All rights reserved.Öğe Adsorption of Reactive Blue 114 dye by using a new adsorbent: Pomelo peel(ELSEVIER SCIENCE INC, 2014) Argun, Mehmet Emin; Guclu, Dunyamin; Karatas, MustafaThis 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.Öğe Application of Fenton process for decolorization of reactive black 5 from synthetic wastewater: Kinetics and thermodynamics(WILEY, 2011) Argun, Mehmet Emin; Karatas, MustafaThe 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, 2010Öğe Decolorization of antraquinonic dye, Reactive Blue 114 from synthetic wastewater by Fenton process: Kinetics and thermodynamics(ELSEVIER SCIENCE INC, 2012) Karatas, Mustafa; Argun, Yusuf Alparslan; Argun, Mehmet EminIn 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 Fe2+:H2O2 ratio, pH value, reaction time and temperature were examined. Maximum decolorization (86%) efficiencies were achieved at the Fe2+:H2O2 ratio of 0.1 and pH 3 for 20 min 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. (C) 2011 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.Öğe Decolorization of reactive dyes under batch anaerobic condition by mixed microbial culture(ACADEMIC JOURNALS, 2009) Karatas, Mustafa; Dursun, Sukru; Argun, Mehmet EminDecolorization of reactive dyes, which are used in textile industry, under batch anaerobic conditions by mixed microbial culture was investigated in this study. Decolorization of C.I. Reactive Black 5 (RB 5), C.I. Reactive Red 24 (RR 24) and C.I. Reactive Blue 49 (RB 49) with initial concentrations ranging from 150 to 2400 mg/L was investigated. Decolorization efficiencies obtained were 93.4% for RB 5 and 98.9% for RR 24 both with initial concentration of 2400 mg/L after 24 h incubation period. However, decolorization was lower for the dye of RB 49 than other two dyes in all concentrations despite 72 h incubation period by mixed anaerobic culture. All of the three dyes correlated with 1(st) order reaction kinetic with respect to decolorization kinetics. The results of the study demonstrated that high decolorization was obtained under anaerobic condition depending on chemical structure of the dye.Öğe Heavy metal accumulation in wheat plants irrigated by waste water(EDITURA ACAD ROMANE, 2006) Karatas, Mustafa; Dursun, Sukru; Guler, Ersin; Ozdemir, Celaletttn; Argun, M. EminHeavy metals, known as a highly pollutant group with toxic and carcinogen effects, tend to accumulate in living organisms. As the farmers of Konya began to use the wastewate of the dischare, channels for agricultural irrigation, the productive soils have been polluted for a long time period, and the plants growing in the vicinity of the discharge channel were negatively affected. The study investigates heavy metals accumulation in 60 wheat samples collected from wastewater-irrigated fields around discharge channels, during the growth period of plants. Results of this study showed that sewage channel water application for field watering increased the heavy metals (Cu, Cr, Mn, Ni, Pb and Zn) content in the root, body and seed parts of wheat plant, the increases recorded being higher for Mn and Zn.Öğe Heavy metal adsorption by modified oak sawdust: Thermodynamics and kinetics(ELSEVIER SCIENCE BV, 2007) Argun, Mehmet Emin; Dursun, Sukru; Ozdemir, Celalettin; Karatas, MustafaThis paper describes the adsorption of heavy metal ions from aqueous solutions by oak (Quercus coccifera) sawdust modified by means of HCl treatment. Our study tested the removal of three heavy metals: Cu, Ni, and Cr. The optimum shaking speed, adsorbent mass, contact time, and pH were determined, and adsorption isotherms were obtained using concentrations of the metal ions ranging from 0.1 to 100 mg L-1. The adsorption process follows pseudo-second-order reaction kinetics, as well as Langmuir and D-R adsorption isotherms. The paper discusses the thermodynamic parameters of the adsorption (the Gibbs free energy, entropy, and enthalpy). Our results demonstrate that the adsorption process was spontaneous and endothermic under natural conditions. The maximum removal efficiencies were 93% for Cu(II) at pH 4, 82% for Ni(II) at pH 8, and 84% for Cr(VI) at pH 3. (c) 2006 Elsevier B.V. All rights reserved.Öğe Methane Production from Anaerobic-Aerobic Sequential System Treatment of Azo Dye Reactive Red 24(WILEY, 2011) Karatas, Mustafa; Dursun, Sukru; Argun, Mehmet EminThis study describes the treatment of azo dye Reactive Red 24 (RR 24) and methane production efficiency of anaerobic-aerobic sequential system. An upflow anaerobic sludge blanket and continuously stirred aerobic reactor were used to treat RR 24 dye. The effect of hydraulic retention time (HRT), organic loading rate, and sludge retention time ratio on the methane production percentage, color, and chemical oxygen demand (COD) removal was investigated. The sequential anaerobic-aerobic treatment of synthetic dye wastewater feed with 150 mg/L of RR 24 dye resulted in 100% color and 95.2% COD removal at 5.76-day HRT. The amount of methane produced in anaerobic reactor was 563 mL/day (80% methane in total gas) and 129 mL/day (55%) for organic loading of 2.52 and 23.53 kg COD/(m(3) day), respectively. (C) 2010 American Institute of Chemical Engineers Environ Prog, 30: 50-58, 2011Öğe Optimization of landfill leachate oxidation at extreme conditions and determination of micropollutants removal(DESALINATION PUBL, 2017) Argun, Mehmet Emin; Alver, Alper; Karatas, MustafaThe 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.Öğe Physico-Chemical Studies of Enamel Cover Industry Wastewater(ASIAN JOURNAL OF CHEMISTRY, 2009) Ozdemir, Celalettin; Karatas, Mustafa; Sahinkaya, Serkan; Argun, Mehmet EminThe enamel plating industry wastewater has a reputation for being a major pollutant. Plating has become a major industry and is one of the fastest growing sectors of the world economy. Enamel industry is typically associated with detrimental environmental effects. There was not exactly a study source of enamel cover wastewater and characteristics in Turkey. This study has been made for completing this subject and to solve available problems. To achieve the objectives of the study, the samples taken from metal plating wastewater, were analyzed in the laboratories. Waste-water produced plating unit in enamel have high chemical oxygen demand (394 mg L(-1)) and suspended solid (486 mg L(-1)) concentrations. In this study, physico-chemical properties were also evaluated in enamel plating industry wastewater. The optimum polielectrolyte dose with lime addition was determined as 1660 mgL(-1) in order to obtain 86 % COD, 94 % TSS removal effiency at pH 9.Öğe Removal of cadmium from water using clinoptilolite(ASIAN JOURNAL OF CHEMISTRY, 2007) Karatas, MustafaThe present study examined the use of clinoptilolite for the removal of cadmium from aqueous solutions. The effects of pH and contact time on the adsorption process were examined. The optimum pH for adsorption was found to be 5.0. A decrease in the clinoptilolite concentration with a constant cadmium concentration or an increase in the cadmium concentration with a constant clinoptilolite concentration, increased cadmium loading per unit weight of the adsorbent. As a result, the maximum removal efficiency levels obtained were as follows; 95.32% for the clinoptilolite at pH 5.0 and contact time 15 min.Öğe Removal of Cd(II), Pb(II), Cu(II) and Ni(II) from water using modified pine bark(ELSEVIER SCIENCE BV, 2009) Argun, Mehmet Emin; Dursun, Sukru; Karatas, MustafaThis paper describes the removal of Cd(II), Pb(II), Cu(II), and Ni(II) ions from aqueous solutions using chemically modified pine barks (Pinus nigra). In this article, effects of chemical modification methods on the adsorption capacity have been investigated. Changes of the surface properties were examined by the FTIR, SEM and zeta potential analyses. HCl, NaOH, Fenton reactive, polymerization, acetone, ethanol. chloroform, tetra ethylene glycol, diethyl ether and glycol were used for modification processes. Maximum adsorption capacities were obtained by modification with NaOH (13-20 mg/g), Fenton (12-17 mg/g) and polymerization (12-16.5 mg/g). These modification processes also decreased Chemical Oxygen Demand of water from 1820 mg/L for raw pine barks to 35 mg/L for NaOH modified barks. Adsorption capacities of adsorbents increased from 2 mg/g to 20 mg/g as a result of modification that accordingly increase adsorbent surface activity. (C) 2009 Elsevier B.V. All rights reserved.Öğe TREATMENT OF MINERAL-OIL RECOVERY INDUSTRY WASTEWATER BY SEQUENTIAL AERATION AND FENTON'S OXIDATION PROCESS(GH ASACHI TECHNICAL UNIV IASI, 2010) Argun, Mehmet Emin; Karatas, Mustafa; Dursun, SuekrueThis study describes the treatment of preliminary aerated mineral-oil recovery industry wastewater (MORIW) using Fenton's reagent. Application parameters such as Fe(2+) and H(2)O(2) 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+):H(2)O(2) 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.
