Person: YONAR, TANER
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YONAR
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TANER
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Publication Investigation of electrochemical color removal from organized industrial district (oid) wastewater treatment plants using new generation sn/sb/ni-ti anodes(Global Network Environmental Science & Technology, 2019-03-01) Kurt, A.; Yonar, Taner; YONAR, TANER; Shakir, F.; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü.; 0000-0002-6032-7190; AAD-9468-2019In this study, the application of Sn/Sb/Ni-Ti electrodes for the treatment of waste streams were investigated which is promising for ozone production by electrolysis of water because of their stability and high potential for ozone evolution reaction. These series of anodes have a high electrochemical ozone generation potential at ambient conditions (approximately up to 40% current efficiency). But using and testing of these novel anodes for real wastewater are too limited in the literature. Titanium mesh substrate coated with Sn/Sb/Ni-Ti alloy was used as anode immersed in wastewater at room temperature with platinized titanium cathode. These electrodes used for COD and color removal from OID wastewater in Inegol, Bursa, Turkey. Five operational parameters were evaluated for electrochemical COD and color removal processes, such as pH, salt content, applied voltage/current, current efficiency and contact time. Experimental results showed that after 30 min the electrochemical oxidation efficiency of COD and color could reach up to 98% and 99% respectively at pH 8.2 and temperature of 25 degrees C as the optimum conditions. Current density observed as the most effective parameter for COD and color removal efficiencies. The lowest energy consumption was between 10-25 mA cm(-2) of current density with only 0.6 kWh gCOD(-1), while the highest energy consumption was 100 mA cm(-2) of current density with 9.12 kWh kgCOD(-1). The optimum current density value has been found as 50 mA cm(-2) with 4.05 kWh gCOD(-1). These results were also supported with ANOVA test.Publication Nitrate and/or nitric acid formation in the presence of different radical scavengers during ozonation of water samples; are scavengers effective?(Mdpi, 2023-05-11) Keris-Sen, Ülker D. D.; Yonar, Taner; YONAR, TANER; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Anabilim Dalı.; 0000-0002-8354-1640In this study, we investigated the effect of different radical scavengers on the nitrate and/or nitric acid (NO3 and/or HNO3) formation chain in liquid while the dielectric barrier discharge plasma system (DBD) was used for ozone (O-3) generation. The effects of the excess concentration of each scavenger were studied individually. In addition, ultrapure water (UPW), tap water, and surface water samples were examined in the same condition. Due to the absence of scavengers in the UPW, we expected the highest NO3 formation in this experiment because all active species produced by the DBD system should have formed NO3. However, the obtained results were unexpected; the highest NO3 formation was obtained in the tap water at 385 +/- 4.6 mg/L. The results can be explained by some compounds in tap water acting as a trap for radicals involved in chain reactions that form NO3 and/or HNO3. The second highest result was obtained in the sodium hydroxide solution as 371 +/- 4.9 mg/L, since the OH ions accelerated the decomposition of O-3 to its intermediates such as hydroperoxide (HO2), ozonide (O-3), and hydroxyl radical (OH center dot), and, by increasing radicals in the liquid, more chain reactions can be promoted that lead to the formation of NO3 and/or HNO3. On the other hand, the quenching of radicals by scavengers such as carbonate ion and phosphoric acid and/or the long-term stabilization of O-3 as O-3 negatively affected the chain reactions that generate NO3 and/or HNO3.Publication Editorial: Frontiers in chemistry-rising stars: Asia(Frontiers Media Sa, 2021-11-24) Guo, Lei; Mohanty, Jyotirmayee; Liu, Wukun; Sun, Hongyan; Minami, Tsuyoshi; Soleymani, Jafar; Moosa, Basem; Zhou, Qianxiong; Yonar, Taner; YONAR, TANER; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Anabilim Dalı.; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Anabilim Dalı.; 0000-0001-7849-9583; 0000-0002-0469-907X; 0000-0001-5755-2955; 0000-0001-8331-378X; 0000-0002-8316-5104; 0000-0002-2350-4100; 0000-0001-7472-0164; C-6558-2014; J-5575-2019; D-5751-2011; U-5220-2018Publication Electrochemical treatment of cefalexin with Sb-doped SnO2 anode: Anode characterization and parameter effects(Techno-Press, 2022-12-01) Kurt, Ayşe; Helvacıoğlu, Hande; Yonar, Taner; Kurt, Ayşe; Helvacıoğlu, Hande; YONAR, TANER; Bursa Uludağ Üniversitesi/Bilimsel ve Teknolojik Merkezi Araştırma Laboratuvarı.; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü.; 0000-0002-6032-7190; 0000-0002-0387-0656; GZB-6111-2022; HLZ-8461-2023; AAD-9468-2019In this study, it was aimed to evaluate direct oxidation of aqueous solution containing cefalexin antibiotic with new generation Sn/Sb/Ni: 500/8/1 anode. The fact that there is no such a study on treatment of cefalexin with these new anode made this study unique. According to the operating parameters evaluation COD graphs showed clearer results compared to TOC and CLX and thus, it was it was chosen as major parameter. Furthermore, pseudo-first degree kd values were calculated from CLX results to show more accurate and specific results. Experimental results showed that after 60 min of electrochemical oxidation, complete removal of COD and TOC was accomplished with 750 mg L-1 KCl, at pH 7, 50 mA cm-2 current density and 1 cm anode-cathode distance. Also, the stability of the Sn/Sb/Ni anode was evaluated by taking SEM and AFM images and XRD analysis before and after of electrochemical oxidation processes. According to the results, it was not occurred too much change on the anode surface even after 300 h of electrolysis. Thus, it was thought that the anode material was not corroded to a large extent. Furthermore, the removal efficiencies were very high for almost all the time and conditions. According to the results of the study, electrochemical oxidation with new generation Sn/Sb/Ni anodes for the removal of cefalexin antibiotic was found very successful and applicable due to require less reaction time complete mineralization and doesn't require pH adjustment step compared to other studies in literature. In future studies, different antibiotic types should be studied with this anode and maybe with real wastewaters to test applicability of the process in treatment of pharmaceutical wastewaters containing antibiotics, in a better way.Publication The effect of various parameters on electrochemical removal of ampicillin with Sn/Sb/Ni-Ti anodes(Gazi Üniversitesi, 2023-01-01) Kurt, Ayşe; Shakir, Fanar; Yonar, Taner; Kurt, Ayşe; Shakir, Fanar; YONAR, TANER; Bursa Uludağ Üniversitesi/Merkezi Araştırma Laboratuvarı.; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü.; 0000-0002-6032-7190; GZB-6111-2022; HEL-8975-2022; AAD-9468-2019In this study, it was investigated the applicability of Sn/Sb/Ni-Ti anodes for electrochemical oxidation of ampicillin in aqueous solutions. Potassium chloride, which is one of the salt types were used as electrolyte, affected the removal efficiencies more positively than sodium chloride. Complete removals of ampicillin and chemical oxygen demand were occured after 5 ve 60 min, respectively with potassium chloride addition; while it was necessary after 5 ve 90 min, respectively with sodium chloride addition. The current density value was found to be 50 mA cm-2, which provides the highest removal efficiencies over 90 minute reaction. In addition, it was seen that it is possible to operate the electrochemical oxidation process more economically, when it was studied at the natural pH value of the aqueous antibiotic solution. According to the results of this study, electrochemical oxidation process with Sn/Sb/Ni-Ti anodes for the degradation of ampicillin is considered quite promising for future applications in terms of less reaction time, full mineralization and no need for an extra pH adjustment step.Publication The evaluation of parameter effects on cefoperazone treatability with new generation anodes(Nature Portfolio, 2022-08-18) Kurt, Ayşe; Yonar, Taner; Kurt, Ayşe; YONAR, TANER; Bursa Uludağ Üniversitesi/Merkezi Araştırma Laboratuvarı; Bursa Uludağ Üniversitesi/Çevre Mühendisliği/Mühendislik Fakültesi; 0000-0002-6032-7190; GZB-6111-2022; AAD-9468-2019In this study it was aimed to investigate the treatability of cefoperazone with new generation Sb-doped SnO2-Ni anodes. For this purpose, it was studied with Sn/Sb/Ni: 500/8/1 anodes for the oxidation of aqueous solution containing cefoperazone antibiotic by addition of different types of electrolyte. Potassium chloride was found as the best electrolyte type affecting the electrochemical reactions positively even at lower concentrations (750 mg/L-1). At pH 8 the best results were obtained, which is the neutral pH value of the aqueous solution. 50 mA/cm(2) was found as the best value for current density parameter, providing full mineralization just after 60 min of reaction. The removal efficiencies increased generally with the increase of current density, because active oxidants occur increasingly at higher current values. According to the results of the study it was seen that, electrochemical oxidation processes with Sn/Sb/Ni-Ti anodes could be carried out efficiently without need adding extra electrolyte (salt) and pH adjustment step for real wastewaters containing antibiotics. Thus, it was found an easy and economic way to perform electrochemical oxidation with Sn/Sb/Ni-Ti anodes for the wastewaters containing cefoperazone antibiotics.Publication Determination of the optimum conditions for electrochemical regeneration of exhausted activated carbon(Elsevier, 2023-02-02) Gazigil, Leyla; Er, Eren; Yonar, Taner; GAZİGİL, LEYLA; Er, Eren; YONAR, TANER; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü; 0000-0001-8139-1338; 0000-0002-8798-8933; AAY-9420-2020; AAX-9798-2021; AAD-9468-2019In this study, the electrochemical regeneration of activated carbon used to soften the mains water in the batch system was investigated. The experimental data obtained were used to test the Freundlich and Langmuir isotherm models and it was seen that the experimental results showed good agreement with the Langmuir isotherm. To determine the optimum conditions; electrolyte type, electrolyte concentration, current density, electrolyte pH and regeneration time parameters were optimized. To evaluate the performance of activated carbon after electrochemical regeneration, adsorption tests with methylene blue (MB) were performed. The best removal efficiency was obtained with 0.1 M NaBr, 50 mA/cm2, 13 g activated carbon (AC) and 200 mL electrolyte volume. In the research, Sn/Sb/Ni-Ti cube was chosen as the anode and Pt/Ti as the cathode. After the ideal conditions for the electrochemical regeneration of AC were determined, the adsorption-regeneration cycle was carried out. As a result, it has been found that AC can be effectively recycled up to 6 times. While the removal efficiency was 98.78 % after the first cycle, the removal efficiency was calculated as 68.55 % in the last cycle. In addition, 1.3 kWh/kg electrical energy consumption was obtained under optimum conditions in the research.Publication Comparing treatment methods that remove color from the effluent of an Organized Industrial District (OID)(Desalination, 2015-06-19) Kılıç, Melike Yalılı; Yonar, Taner; Teker, Selin; Kestioğlu, Kadir; YALILI KILIÇ, MELİKE; YONAR, TANER; Teker, Selin; Kestioğlu, Kadir; Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü.; 0000-0002-0387-0656; AAD-9468-2019; AAG-8505-2021; EBO-4091-2022; FBH-9013-2022This study investigates the treatability, in terms of color removal, of an effluent taken from an Organized Industrial District wastewater treatment plant located in Bursa, western Turkey. To remove the color, chemical coagulation, Fenton and Fenton-like oxidation, ozonation, adsorption, and membrane processes were employed, and the results were compared. In coagulation experiments, maximum color removal (87.4%) was obtained at pH 12.2 with a dose of 240 mg/L MgCl2 +Ca- (OH)(2). Fenton and Fenton-like oxidation processes showed high color removal efficiencies (93.1 and 80%, respectively) from the evaluated effluents. The best color removal (93.6%) in this study was achieved by an ozonation process at a dose of 8 g/L-min ozone with a pH of 12 and a contact time of 3 min. In addition to the color removal efficiencies for the applied processes, their associated operating costs were also calculated.Publication Electrochemical removal of cefazolin from aqueous media by novel composite anodes: Effects of electrolytes and operating parameters(Elsevier, 2021-12-01) Kurt, Ayşe; Er, Eren; Neselen, Esra; Yonar, Taner; Kurt, Ayşe; Er, Eren; Neselen, Esra; YONAR, TANER; Bursa Uludağ Üniversitesi/Bilimsel ve Teknolojik Destekler Merkezi Araştırma Laboratuvarı; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü; 0000-0002-6032-7190; 0000-0001-8139-1338; 0000-0002-0387-0656; AAY-9420-2020; GZB-6111-2022; FNT-9826-2022; AAD-9468-2019In this study, we aimed to investigate the capability of novel stable Ni-based anodes with platinized titanium cathodes to eliminate cefazolin antibiotics from aqueous media. For this purpose, different types of electrolytes were compared, and potassium chloride was found to be the optimal electrolyte for promoting the elimination of antibiotics, even at low concentrations. Thus, it may be possible to obtain higher removal efficiencies with real water/wastewaters, even without the addition of extra electrolytic chemicals, assuming the water being treated includes chloride ions. A pH of 7, which is the neutral pH value of the aqueous solution containing antibiotics, was defined as the optimal pH value as it provided the highest removal efficiencies. Thus, it may be possible to operate the process more easily and more economically by working at neutral pH values, as no additional chemical costs are incurred due to pH adjustment. Moreover, more efficient results were obtained at lower current densities with this anode in comparison to other studies on the electrochemical treatment of antibiotics in the literature. As a result of this study, electrochemical oxidation with Sb-doped SnO2 anodes was found to be very useful and successful for the removal of cefazolin from water in terms of both removal efficiency and cost effectiveness.Publication Electro-oxidation of indigo blue aqueous solution for COD and color removal: RSM optimization and pilot-scale study(Springer, 2023-08-18) Er, Eren; Gazigil, Leyla; Yonar, Taner; Er, Eren; GAZİGİL, LEYLA; YONAR, TANER; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Çevre Mühendisliği Bölümü; 0000-0001-8139-1338; 0000-0002-8798-8933; AAY-9420-2020; AAX-9798-2021; AAD-9468-2019In this study, the removal of indigo dye, which is used in the denim industry, by using the electro-oxidation method was investigated. Experiments were carried out using Sn/Sb/Ni-Ti anode and Pt-Ti cathode electrodes of indigo dye aqueous solution with an initial concentration of 100 mg/L, which was prepared synthetically in the laboratory. In the first stage of the study, appropriate support electrolyte (NaCl, KCl, Na2SO4, K2SO4) detection investigations were carried out. As a result of the trials, NaCl electrolyte was chosen as the supporting electrolyte type because it is both affordable and has high removal efficiency compared to other electrolytes. Color and COD removal were established according to the effective factors (pH, current density, supporting electrolyte concentration and electro-oxidation time) for the electro-oxidation method using the central composite design (CCD) based response surface methodology (RSM). The design consists of four components and seven central experiments, each with three levels. According to the RSM result, ideal conditions were pH 11, current density 51.01 mA/cm(2), supporting electrolyte concentration 1565.66 mg/L and duration 120 min. In ideal conditions, COD removal was determined as 97.43% and color removal as 98.93%, while energy consumption was determined as 17.49 kWh/kg COD. In the last stage of the study, pilot-scale tests were carried out in a spherical polyethylene (PE) tank with a bottom diameter of 65 cm and a height of 157 cm. Color and COD removal efficiencies obtained from the pilot scale under optimum conditions were calculated as 95.26% and 92.16%, respectively.