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Öğe Alternative Composite Nanosorbents Based on Turkish Perlite for the Removal of Cr(VI) from Aqueous Solution(HINDAWI LTD, 2015) Edebali, SerpilNew nanocomposite sorbents were synthesized and used for Cr(VI) removal from aqueous solution by modifying Turkish perlite with alpha-MnO2 (PAM) and gamma-Fe2O3 (PGI) nanoparticles. Nanocomposite sorbents were characterized using scanning electron microscopy (SEM) and FTIR. The effects of several parameters such as contact time, amount of sorbent, pH, and concentration were investigated and it was found that the sorption capacity for Cr(VI) was found to be highly pH dependent. Also the experimental data were evaluated in terms of different isotherm models. The data of PGI were well fit to DR isotherm model whereas PAM data were well described with Temkin isotherm model. The sorption capacities were found to be 8.64 and 7.6 mg g(-1) for PGI and PAM, respectively. This confirms that these nanocomposites retain the constituent nanoparticle properties while being macroscopic particles suitable for chromium removal in water treatment.Öğe An artificial neural network model for wastewater treatment plant of Konya(2015) Tümer, Abdullah Erdal; Edebali, SerpilIn this study, modelling of Konya wastewater treatment plant was studied by using artificial neural network with different architectures in Matlab software. All data were obtained from wastewater treatment plant of Konya during daily records over four month. Treatment efficiency of the plant was determined by taking into account of input values of pH, temperature, COD, TSS and BOD with output values TSS. Performance of the model was compared via the parameters of Mean Squared Error (MSE), and correlation coefficient (R). The suitable architecture of the neural network model is determined after several trial and error steps. According to the modelling study, the ANN can predict the plant performance with correlation coefficient (R) between the observed and predicted output variable reached up to 0.96.Öğe Evaluation of Amberlite Ira96 and Dowex 1 X 8 Ion-Exchange Resins for the Removal of Cr(VI) From Aqueous Solution(Elsevier Science Sa, 2010) Edebali, Serpil; Pehlivan, ErolThe removal of Cr(VI) from aqueous solution by two commercially available resins (Amberlite IRA96 and Dowex 1 x 8) was investigated. Batch adsorption processes were carried out as a function of time, adsorbent dosage, pH and temperature to evaluate the performance of the resins. The optimum pH for Cr(VI) adsorption was found as 3.0 for these resins. It was found that more than 93% removal was achieved under optimal conditions. The maximum adsorption capacities are 0.46 and 0.54 mmolig of Amberlite IRA96 and Dowex 1 x 8 resin for Cr(VI) ion, respectively. The suitability of Freundlich and Langmuir adsorption models were investigated for Cr(VI)-resin equilibrium. A pseudo-second order kinetic model has been proposed to correlate the experimental data. The equilibrium adsorption level for Dowex 1 x 8 decreased with increasing temperature, while it increased for Amberlite IRA96.Öğe Evaluation of chelate and cation exchange resins to remove copper ions(ELSEVIER SCIENCE BV, 2016) Edebali, Serpil; Pehlivan, ErolCopper ion (Cu2+) removal from aqueous solutions was performed with two different chelating resins (bis-picolylamine, iminodiacetate). In order to compare the results obtained from the chelating resins, strong acid cation exchangers were used with sulfonic acid functionally. The effects of the following parameters such as the amount of resin, the duration, pH levels and concentration were noted for the ion-exchange. The Langmuir, Freundlich, D-R and Scatchard isotherm models were used to evaluate the data. The Langmuir isotherm model was found to be the best model. The chelating resins which retained some of their functional groups showed good properties for the removal of Cu2+ from aqueous solutions. The sorption capacity of the resins increased with the rising Cu2+ concentration in the aqueous medium. FT-IR analysis results show clearly that the ion-exchange and chelating took place as mechanisms which rule during the sorption of Cu2+ from aqueous phase. (C) 2016 Elsevier B.V. All rights reserved.Öğe Evaluation of Cr(III) by ion-exchange resins from aqueous solution: equilibrium, thermodynamics and kinetics(TAYLOR & FRANCIS INC, 2014) Edebali, Serpil; Pehlivan, ErolThe removal of Cr(III) ions from aqueous solution by two commercially available resins (Amberlite IRN77 and Purolite C160) was investigated. Batch adsorption processes were carried out as a function of time, adsorbent dosage, pH, concentration and temperature to evaluate the performance of the resins. It was found that more than 90% removal was achieved under optimal conditions. The optimum pH for Cr(III) adsorption was found as 4.0 for these resins. The suitability of Freundlich, Langmuir, Scatchard and Dubinin-Radushkevich adsorption models was also investigated for Cr(III)-resin system. A pseudo-second-order kinetic model has been proposed to correlate the experimental data. The equilibrium adsorption level for Amberlite IRN77 slightly decreased with increasing temperature, while it was nearly the same for Purolite C160.Öğe Organo-modifiye nanokilin alternatif bir adsorban olarak atıksulardan CR(VI) uzaklaştırılmasında kullanımı(Selçuk Üniversitesi Mühendislik Fakültesi, 2016) Kahraman, Havva Tutar; Edebali, SerpilBu çalışmada, organo-modifiyeli nanokilin sulardan Cr(VI) iyonlarının giderimindeki performansı değerlendirilmiştir. Organokillerin değişik pH aralığında ağır metalleri giderebildiği bilindiğinden, hem apolar organik kirleticiler hem de ağır metaller içeren karışık atık su sistemlerinde de etkili olabilecekleri düşünülmüştür. Bu amaçla, oktadesilamonyum (I30E, Nanomer, Nanocor, USA) ile modifiye edilmiş organo-montmorillonit nanokilin Cr(VI) adsorpsiyonunda kullanımı ve kesikli sistemde incelenen prosese temas süresi, çözelti pH'sı, başlangıç metal konsantrasyonu ve adsorban miktarı gibi parametrelerin etkisi incelenmiştir. Cr(VI) iyon miktarının sulu çözeltilerdeki tayini UV-visible spektrofotometre ile gerçekleştirilmiştir. Cr(VI) iyonunun organokile adsorpsiyonunda pH 2'de maksimum kapasite gözlenirken, pH?nın 2?den 6?ya arttırılmasıyla kapasite azalmıştır. Adsorpsiyon izotermlerinden Langmuir ve Freundlich izotermleri deneysel verilerin uygunluğunu test etmek için kullanılmış olup Cr(VI) iyonlarının organokil kullanılarak giderilmesinde gerçekleşen adsorpsiyon reaksiyonlarının Langmuir izoterm modeline uygun olduğunu göstermiştir.Öğe Physical and Chemical Factors Affecting the Adsorption of Cr(VI) via Humic Acids Extracted From Brown Coals(Elsevier Science Bv, 2010) Arslan, Gülşin; Edebali, Serpil; Pehlivan, E.The aim of this study is to demonstrate the potential of humic acids (HAs) as a low-cost reactive barrier material for environmental protection applications of toxic Cr(VI). Sorption of Cr(VI) on the HAs obtained from Ilgin, Beysehir and Ermenek lignites in Turkey were investigated and their sorption properties were compared with the activated carbon (AC) from Merck. The adsorption was carried out using a batch method. The sorption of Cr(VI) on the surface of HAs depends strongly on the pH and Cr(VI) sorption increased with a decreasing pH and increase in the concentration of this metal. The Freundlich adsorption isotherm was used to describe observed sorption phenomena. It was observed that the maximum adsorption capacity of 0.55 mmol Cr(VI)/g for Ilgin, 0.64 mmol Cr(VI)/g for Beysehir and 0.40 mmol Cr(VI)/g for Ermenek was achieved at pH of 3.2. The rise in temperature caused a slight decrease in the value of the equilibrium constant (K(c)) for the sorption of Cr(VI). The Cr(VI) sorption capacities of Beysehir and Ilgin HAs were nearly as same as that of AC (0.58 mmol Cr(VI)/g). Therefore, HAs are used for the adsorption of Cr(VI) in wastewater treatment applications.Öğe Prediction of Wastewater Treatment Plant Performance Using Multilinear Regression and Artificial Neural Networks(IEEE, 2015) Tumer, Abdullah Erdal; Edebali, SerpilIn this study, modeling of Konya wastewater treatment plant was studied by using multilinear regression and artificial neural network with different architectures in SPSS and MATLAB software. All data were obtained from wastewater treatment plant of Konya during daily records over four month. Treatment efficiency of the plant was determined by taking into account the input values of pH, temperature, COD, TSS and BOD with output values of COD. To compare the performance of the model, coefficient of determination (R-2) and Mean Squared Error (MSE) were used. In Multilinear regression method, to understand the effects of the tested parameters, regression function was developed. The highest prediction efficiencies was obtained two hidden layers in Artificial Neural Network models. According to the modeling study, Artificial Neural Network models responded more satisfactory results than Multilinear Regression model.Öğe Sulu çözeltilerden krom iyonlarının uzaklaştırılmasında sorpsiyon ve sorpsiyon mikrofiltrasyon hibrit sisteminin uygulanması(Selçuk Üniversitesi Fen Bilimleri Enstitüsü, 2010-07-30) Edebali, Serpil; Pehlivan, ErolBu çalışmada, Cr(III) ve Cr(VI) iyonlarının sulu çözeltilerden uzaklaştırılmasında bazı reçineler (katyon ve anyon değiştirici) iyon değiştirme prosesinde denenmiş, deneylerde, ortamın pH'ı, tutunma zamanı, metal iyon konsantrasyonu, sorbent miktarı, sıcaklık gibi parametrelerin metal uzaklaştırılmasındaki etkileri incelenmiştir. Daha sonra, birinci basamakta metal tutucu olarak iyon değiştirici kullanılmış ve mikrofiltrasyon (MF) membran ile sorbentin tutulması sağlanmıştır. Böylece sulu çözeltideki metal konsantrasyonunu mimimuma indirmek amacıyla hibrit sorpsiyon-mikrofiltrasyon sistemi uygulanmıştır. Metal-sorpsiyon işlemlerinde denge sorpsiyon izoterm eğrileri Freundlich, Langmuir, D-R ve Scatchard sorpsiyon izotermleri kullanılarak çizilmiş ve bu izotermlerden sorpsiyon parametreleri (k, n, As, Kb, Xm, K, E, Qs ve Ks) hesaplanmıştır. Ayrıca, deneyler sonunda birinci ve ikinci derece kinetik denklemleri verilere uygulanarak prosesin kinetiği de incelenmiştir.Öğe Use of chabazite, a naturally abundant zeolite, for the investigation of the adsorption kinetics and mechanism of methylene blue dye(ELSEVIER SCIENCE BV, 2016) Aysan, Hamza; Edebali, Serpil; Ozdemir, Celalettin; Karakaya, Muazzez Celik; Karakaya, NecatiChabazite, one of the common types of zeolite, was used in our study to remove methylene blue (MB) dye from aqueous solutions. The characterization of chabazite was performed using scanning electron microscope (SEM), Fourier Transform infrared (FTIR), X ray diffraction (XRD), and thermogravimetric-differential thermal analyses TG/DTA. During the experimental study, the effects of some parameters, such as contact time, adsorbent dosage, pH, stirring speed, and concentration, on the removal efficiency of chabazite were taken into consideration. To evaluate the experimental data, Langmuir, Freundlich, and Tempkin isotherm models were used. The experimental data were well fitted to the Langmuir isotherm model, with a correlation coefficient of 0.95. The adsorption kinetics of MB dye on chabazite could be described by a pseudo second-order model. (C) 2016 Elsevier Inc. All rights reserved.Öğe ?Yeşil Sentez” yöntemiyle üretilmiş gümüş nanotanecik yüklü aktif karbonun CR(VI) giderimindeki performansının değerlendirilmesi(Selçuk Üniversitesi Mühendislik Fakültesi, 2016) Edebali, Serpil; Kahraman, Havva TutarBu çalışma, sulu çözeltilerden krom(VI) iyonunun uzaklaştırılmasında gümüş (Ag) nanotanecik yüklü aktif karbonun (AgNP-AK) adsorban olarak kullanımının değerlendirilmesini amaçlamaktadır. pH etkisi, adsorban miktarı, temas süresi ve başlangıç metal konsatrasyonu gibi parametrelerin incelenmesi ile gerekli optimizasyon şartları belirlendikten sonra farklı izoterm modelleri üzerinde çalışılmıştır. Adsorpsiyon öncesi ve sonrası çözeltideki metal iyon değişimleri UV–vis spektrofotometresi ile tayin edilmiştir. Elde edilen denge eğrisi, Langmuir izoterm modeline daha çok uygunluk göstermiş ve maksimum adsorplama kapasitesi 71,4 mg olarak hesaplanmıştır. Bu çalışma ile elde edilen veriler ışığında çevreci bir yöntemle elde edilen AgNP-AK adsorbanının krom(VI) iyonunun uzaklaştırılmasında umut vaadeden yeni bir alternatif olabileceği sonucuna varılmıştır
