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Öğe Advanced Oxidation Processes for Removal of Dyes from Aqueous Media(Scrivener Publishing Llc, 2015) Atalay, Suheyda; Ersoz, Gulin; Sharma, SKDyes are synthetically aromatic compounds used in various industries such as textile, plastics, pharmaceutical, paper, paint and food. The quality and quantity of wastewaters from these industries are a matter of concern for human health and environmental pollution. Different conventional methods have been developed for dye removal. However, due to the complex structure and recalcitrant nature of dyes, these methods appear to be ineffective in their complete removal. Advanced Oxidation Processes (AOPs) have been considered as a promising alternative to treat wastewater containing dye residues. These processes are based on the production of highly reactive radicals, especially hydroxyl radicals, which promote destruction of the target pollutant until mineralization. This chapter addresses AOPs for removal of dyes from aqueous media by presenting background on advanced oxidation processes. The AOPs will be investigated in two categories: Nonphotochemical and Photochemical Processes. Among these processes, the main focus will be on ozonation, Fenton's reagent oxidation, wet air oxidation and photocatalytic oxidation, with only brief information given on electrochemical oxidation, ultraviolet irradiation and hydrogen peroxide (UV/H2O2) and photocatalytic ozonation (UV/O-3) processes.Öğe Bioinspired metal oxide particles as efficient wet air oxidation and photocatalytic oxidation catalysts for the degradation of acetaminophen in aqueous phase(Academic Press Inc Elsevier Science, 2019) Palas, Burcu; Ersoz, Gulin; Atalay, SuheydaThe catalytic performances of the biomimetic metal oxides were tested in photo Fenton-like oxidation and catalytic wet air oxidation processes. Biomimetic copper oxide, iron oxide, and cobalt oxide catalysts were prepared by using pollen grains as biotemplate. The surface characteristics of the biomimetic metal oxides were characterized. SEM micrographs of the biomimetic catalysts demonstrated that pollen grains were successfully mimicked by metal oxide structures. The influences of UV light intensity, catalyst loading, and the initial hydrogen peroxide concentration on acetaminophen degradation were investigated in the photo Fenton-like oxidation process whereas the effects of reaction temperature and catalyst loading were investigated in catalytic wet air oxidation process. The biomimetic copper oxide was the most effective catalyst for the removal of acetaminophen in both of the advanced oxidation processes. The highest acetaminophen degradation efficiency was 86.9% in photo Fenton-like oxidation process when the initial acetaminophen concentration, catalyst loading, and the initial H2O2 concentrations were 10 mg/L, 0.1 g/L and 1 mM, respectively, at room temperature. In the catalytic wet air oxidation process, 98.3% degradation was achieved for the treatment of 100 mg/L acetaminophen solutions at 180 degrees C and 10 bar by using 1 g/L of catalyst loading at the same reaction time as photo Fenton-like oxidation. Mineralization analysis and the toxicity tests indicated that the biomimetic copper oxide catalysts were promising for the acetaminophen removal in catalytic wet air oxidation processes.Öğe Biotemplated copper oxide catalysts over graphene oxide for acetaminophen removal: Reaction kinetics analysis and cost estimation(Pergamon-Elsevier Science Ltd, 2021) Palas, Burcu; Ersoz, Gulin; Atalay, SuheydaTCuOX-GO (TCuO: Tomato skin inspired copper oxide; GO: Graphene oxide; X, weight percentage of cop-per oxide: 10, 50, and 90) catalysts were prepared and their performances on acetaminophen removal were tested in catalytic wet air oxidation (CWAO) process. Copper oxide particles were synthesized from tomato skin biotemplates to contribute valorization of food wastes and the development of ecofriendly catalysts. The most effective catalyst was determined as TCuO50-GO. Under the optimum conditions 52.1% TOC removal and 96.2% acetaminophen degradation efficiencies were achieved. The acetamino-phen degradation kinetics was found to fit Langmuir-Hinshelwood model. The heat of adsorption and adsorption entropy were calculated as-19148.8 J/mol (for oxygen),-10380.9 J/mol (for acetaminophen),-10.17 J/molK (for oxygen), and-14.5 J/molK (for acetaminophen), respectively. The use of biomimetic catalysts in CWAO process and investigation of treatment cost and reaction kinetics in the presence of the biomimetic catalysts are the main original approaches of this study. (c) 2021 Elsevier Ltd. All rights reserved.Öğe Catalytic wet air oxidation of Reactive Black 5 in the presence of LaNiO3 perovskite catalyst as a green process for azo dye removal(Pergamon-Elsevier Science Ltd, 2018) Palas, Burcu; Ersoz, Gulin; Atalay, SuheydaThe removal of textile azo dye, Reactive Black from the aqueous solutions by catalytic wet air oxidation in the presence of LaNiO3 perovskite catalyst has been investigated. The most suitable reaction conditions were determined by testing various the catalyst loadings, reaction temperature and pressure values, and the initial pH of the Reactive Black 5 solutions. The most suitable reaction conditions with 0.61 L/min of air flow rate were found to be 1 g/L of LaNiO3 loading, 50 degrees C of reaction temperature, 1 atm of reaction pressure, and, pH = 3 for the oxidation of 100 mg/L Reactive Black solutions. Under these conditions the degradation and the decolorization efficiencies were evaluated as 65.4% and 89.6%, respectively. The phytotoxicity analyzes were carried out by using Lepidium sativum. According to the toxicity tests a remarkable decrease in the growth inhibition was achieved by the catalytic wet air oxidation in the presence of LaNiO3 catalyst. The growth inhibition in the untreated and treated dye solutions were calculated as 49.3% and 23.7%, respectively. (C) 2018 Elsevier Ltd. All rights reserved.Öğe Decolorization of Reactive Black 5 using Peroxymonosulfate in Fenton-like Process(Walter De Gruyter Gmbh, 2013) Ersoz, Gulin; Atalay, SuheydaOne of the advanced oxidation processes, the Oxone process, was studied to determine its effects on the decolorization of Reactive Black 5 (RB5) in an aqueous solution. Ferrous ion was chosen as the transition metal due to its potential catalytic effect and wide availability in dye containing industrial effluents. The effects of the operating parameters such as Fe(II) and Oxone concentration, initial pH, and temperature on the process performance were investigated. The optimum conditions were determined as: 0.5 mM of Oxone concentration, 0.5 mM of Fe+2 concentration, a pH of 5, and a temperature of 30 degrees C. At these conditions, the decolorization efficiency was 78%. Based on the results, it can be concluded that application of the Fe+2/Oxone system is very beneficial for a good decolorization efficiency in a very short time.Öğe Degradation of benzoic acid by advanced oxidation processes in the presence of Fe or Fe-TiO2 loaded activated carbon derived from walnut shells: A comparative study(Elsevier Sci Ltd, 2018) Tekin, Gulen; Ersoz, Gulin; Atalay, SuheydaIn this study, the degradation of a major pollutant present in terephthalic acid wastewater, benzoic acid, was investigated by several advanced oxidation methods using catalysts derived from walnut shells. The 10% Fe or 10% Fe-TiO2 (wt/wt, 1:99 as Fe:TiO2) catalysts were loaded on an AC prepared from walnut shells by physical activation or chemical activation methods with different chemical reagents. The effect of the activation method was investigated using catalyst screening tests. The most efficient catalyst for the Fenton-like oxidation and catalytic wet air oxidation was determined as B-FAC and for photocatalytic/photo-Fenton-like oxidation was the N-FTAC from the screening experiments. After the catalyst screening, the effect of operating conditions such as catalyst loading, temperature, initial pH, etc. on the catalytic activity were tested in terms of degradation efficiency by determining their optimum values. Maximum degradation efficiencies from parametric studies for each method were 40% for the Fenton-like oxidation, 70% for the catalytic wet air oxidation, and 90% for photocatalytic oxidation. The highest degradation efficiency was achieved by the photo-Fenton-like oxidation in the presence of the N-FTAC catalyst with a degradation efficiency of 95% at 0.5 g/L catalyst loading, 6W UV light, 2 mM initial H2O2 concentration, and an initial pH of 3 or 6, with a reaction time of 80 min.Öğe Efficient treatment for textile wastewater through sequential photo Fenton-like oxidation and adsorption processes for reuse in irrigation(Elsevier Sci Ltd, 2021) Bayrakdar, Merve; Atalay, Suheyda; Ersoz, GulinThe present study investigates the treatment for textile wastewater through sequential photo Fenton-like oxidation and adsorption processes for reuse in irrigation. The optimum conditions were investigated to reach the minimum irrigation standarts in Turkey. Assessment of the treated wastewater as an irrigation water, evaluation of the agricultural waste as an adsorbent and support material for catalyst are the main significances of this study. Walnut shell and rice husk based adsorbents and catalysts which contain 10% by weight of active site BiBO3 (B:Fe,Ni) were prepared and used. At the optimum conditions of the photo Fenton-like oxidation; the highest total organic carbon removal, TOC, (20-30%) was achieved with the iron containing walnut shell based catalysts. Adsorption studies were carried out as a consequent step with walnut shell based activated carbon. At the end of adsorption step, approximately 86% TOC and 58% Chemical Oxygen Demand (COD) removals were observed. Irrigation water standards were provided for TOC, color, turbidity, total suspended solids, and pH after the adsorption step. Temkin and Dubinin-Radushkevich isotherm models were found to best fit to the adsorption data. The adsorption rate followed second order kinetic model. As a result, the treated wastewater using photo Fenton-like oxidation and adsorption process met the quality of irrigation standarts regarding TOC, color, turbidity and TSS. Also irrigation standarts were obtained considering sodium adsorption ratio (SAR). Treated wastewater have been found to be used in cultivation of plants such as barley, cotton, sugar beet, grass, spinach, long wheat grass, date palm tree, asparagus, bermuda grass sorghum. The application of the hybrid process showed that the proposed method can be implemented effectively for the treatment of real textile wastewater.Öğe Electrocoagulation process for the treatment of real textile wastewater: Effect of operative conditions on the organic carbon removal and kinetic study(Elsevier, 2019) Bener, Sirma; Bulca, Ozlem; Palas, Burcu; Tekin, Gulen; Atalay, Suheyda; Ersoz, GulinIn situ treated real textile wastewater was subjected to electrocoagulation for reuse in agricultural irrigation The effect of several parameters such as electrode type (Al and Fe), current density (12.5-100 mA/cm(2)), initial pH (5-10), and electrocoagulation time (0-120 min) were investigated to determine the optimum electrocoagulation condition. Monopolar electrodes connected in parallel were used for all experiments. The performance of the experiments was mainly evaluated using the Total Organic Carbon (TOC) removal. The Al electrode, 25 mA/cm(2) of current density and a pH=5 was selected as the optimum conditions. Under these conditions 42.5% TOC, 18.6% chemical oxygen demand (COD), 83.5% turbidity, 64.7% of the total suspended solids, and 90.3-94.9% color removal efficiencies were achieved. The operating cost was calculated by considering the energy and electrode consumption and evaluated as 1.5 $/m(3) of treated wastewater. The electrocoagulation reaction followed the second order reaction kinetics. (C) 2019 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.Öğe Fenton-like oxidation of Reactive Black 5 using rice husk ash based catalyst(Elsevier Science Bv, 2014) Ersoz, GulinFenton-like oxidation of Reactive Black 5 dye was carried out using iron(III) impregnated on rice husk ash as heterogeneous catalyst. The catalyst was prepared by wet impregnation method and characterized. The effectiveness of this catalyst in degradation and decolorization of the dye, as well as the influence of reaction parameters on the catalytic activity was discussed. The effects of pH, the initial hydrogen peroxide concentration, the catalyst loading, and the temperature on the oxidative degradation and decolorization of Reactive Black 5 have been assessed. The best degradation efficiency (59.71%) and decolorization efficiency (89.18%) was obtained at temperature = 30 degrees C, pH =3, [H2O2](0)= 4 mM, catalyst loading = 0.5 g/L for initial dye concentration of 100 mg/L. (C) 2013 Elsevier B.V. All rights reserved.Öğe Green catalysts for Fenton-like oxidation of Procion Red MX-5B: Influence of the activation method and the reaction parameters on dye removal(Taylor & Francis Inc, 2017) Palas, Burcu; Ersoz, Gulin; Atalay, SuheydaThe catalytic activities of the iron catalysts over activated carbon supports prepared by different activation methods in the heterogeneous Fenton-like oxidation of Procion Red MX-5B were investigated. The activated carbons were prepared from walnut shells by applying physical and three chemical activation methods, including HNO3, ZnCl2, and KOH activations to obtain various catalyst supports. KOH-activated carbon catalyst was assessed to be the most efficient one. Under the optimum reaction conditions, 47.5% COD removal, 51.6% degradation, and 91.6% decolorization efficiencies were achieved in the presence of this catalyst. In the kinetic study, the activation energy was evaluated as 47.36 kJ/mol.Öğe Heterogeneous photo Fenton-like oxidation of Procion Red MX-5B using walnut shell based green catalysts(Elsevier Science Sa, 2016) Palas, Burcu; Ersoz, Gulin; Atalay, SuheydaThe walnut shell based photo Fenton-like catalysts were prepared and their performances in the removal of Procion Red MX-5B in aqueous solution were investigated. The influence of several operating parameters including the catalyst loading, the initial hydrogen peroxide concentration ([H2O2](o)), pH and power of UV light on the degradation and the decolorization of Procion Red MX-5B were studied. The optimum reaction conditions obtained at room temperature were 2 mM of the initial hydrogen peroxide concentration, 0.25 g/l of catalyst loading and 3 of the initial pH for an initial dye concentration of 100 ppm. Under these conditions 50% degradation and 88.3% decolorization were achieved. Iron leaching in the treated dye solution was determined as 1.98 ppm which was below the European Union limits. The toxicity which was evaluated in terms of relative root growth inhibition rate of Lepidium sativum roots was 0.6%. (C) 2016 Elsevier B.V. All rights reserved.Öğe The hybrid process with eco-friendly materials for the treatment of the real textile industry wastewater(Elsevier, 2020) Bener, Sirma; Atalay, Suheyda; Ersoz, GulinThe present study represents the application of a hybrid process to a pretreated real textile wastewater. Hybrid process includes electrocoagulation, adsorption, and photo Fenton- like oxidation methods. in our previous study, electrocoagulation (EC) method was investigated and the optimum conditions were determined. Nearly 35% total organic carbon (TOC), 18.6%, chemical oxygen demand (COD), 90% turbidity, and 50% color removal efficiencies were achieved by the EC step. in this study adsorption and photo Fenton- like oxidation were applied sequentially to the effluent of EC step. Walnutshell and corncob agricultural wastes were used for the preparation of the activated carbon. After adsorption step, the removal efficiency of the TOC was found to be nearly 75% and color, turbidity, and total dissolved solids achieved the standards for irrigation water. Also, the removal efficiency of the COD was found as 27%. For adsorption, Langmuir isotherm model fit better and the second order kinetic model was found to be the best model. the BiNiO3 catalyst with corncob support material was effective for the photo Fenton- like oxidation method. the optimum conditions were selected as 0.75 g/L BiNiO3/corncob based catalyst loading and pH = 7-7.5. At the end of the hybrid process, 87% TOC, 49% COD, 96% turbidity, approximately 90% color and 95-97% suspended solids removals were achieved. the hybrid system was effective to achieve the irrigation water standards except for salinity and COD. Agricultural wastes used in preparation of catalysts and adsorbents were promoted to be innovative, environmentally friendly and economical.Öğe Investigation of the kinetics of the micropollutant removal by using environmentally-friendly wastewater treatment methods: Fenton like oxidation of Methylene Blue in the presence of LaFeO3 perovskite type of catalysts(Gazi Univ, Fac Engineering Architecture, 2017) Palas, Burcu; Ersoz, Gulin; Atalay, SuheydaMethylene Blue which has a wide usage area in various sectors including the medicine, pharmaceutics, chemistry and textile is one of the common pollutants found in industrial wastewaters. In this study, the catalytic performance of LaFeO3 perovskite type of catalyst under different reaction conditions in Fenton-ike oxidation of the target micropollutant, Methylene Blue was compared. In the parametric study the initial H2O2 concentration was fixed at 1 ppm (1000 mu g/L). The aromatic degradation and the decolorization efficiencies were evaluated as 74.5% and 94.6%, respectively, under the optimum reaction conditions which were determined as 0.05 g/L of catalyst loading, 3.5 of pH, 0.1 mM of the initial H2O2 concentration and 45 degrees C. The iron leaching under the optimum conditions was 0.63 ppm. The toxicity tests were performed by the comparison of the Lepidium sativum root lengths growing in the treated dye solution and the distilled water. The toxicity was evaluated as 1.2% in terms of root growth inhibition. In the kinetic study a reaction mechanism was proposed and the reaction rate equation was derived. The decolorization reaction followed pseudo first order reaction kinetics. The activation energy and the pre-exponential factor were calculated as 130.8 kJ/mole and 1.2 x10(20) min(-1), respectively.Öğe Kinetic Modeling of the Removal of Aniline by Low-Pressure Catalytic Wet Air Oxidation over a Nanostructured Co3O4/CeO2 Catalyst(Amer Chemical Soc, 2011) Ersoz, Gulin; Atalay, SuheydaKinetic modeling of catalytic wet air oxidation (CWAO) of aniline was investigated in a bubble reactor over a nanostructured Co3O4 (10 wt %)/CeO2 catalyst. Eight different models were proposed and tested. The tested models are presented in two sections: power-law based and mechanism-based kinetic expressions. The models were evaluated using the criterion on the minimization of the statistical parameter mean residual sum of squares (MRSS) and average experimental error. The models that led to thermodynamically inconsistent adsorption constants or negative kinetic parameters in the considered models were rejected. The oxidation reaction was best characterized by the Mars-van Krevelen model in which the reaction takes place through alternative oxidation and reduction of the catalyst surface, with the surface oxidation being produced by molecular oxygen dissociatively adsorbed from the gas phase.Öğe Performance investigation of the hybrid methods of adsorption or catalytic wet air oxidation subsequent to electrocoagulation in treatment of real textile wastewater and kinetic modelling(Elsevier, 2021) Bulca, Ozlem; Palas, Burcu; Atalay, Suheyda; Ersoz, GulinThe performances of two hybrid wastewater treatment methods were compared to determine which method is more effective for improving the reusability of textile industry wastewater as irrigation water. in the hybrid treatment processes, either adsorption or catalytic wet air oxidation (CWAO) was performed subsequent to the electrocoagulation. The performances of the adsorption and catalytic wet air oxidation methods were evaluated according to the irrigation water criteria. Rice husk based activated carbon (RHAC) was used as adsorbent and catalyst support material in the adsorption and CWAO, respectively. BiNiO3-RHAC catalyst was prepared and used in CWAO process. The irrigation water criteria for total organic carbon (TOC), turbidity, and color were met and 91 % TOC reduction was achieved after the sequential application of electrocoagulation and adsorption. Freundlich isotherm and second order adsorption kinetics were regarded as the most suitable models to fit the adsorption data. The application of electrocoagulation and catalytic wet air oxidation yielded 62 % TOC removal whereas the oxidation reaction followed a two-step second order reaction kinetics.Öğe Photo Fenton-like oxidation of Tartrazine under visible and UV light irradiation in the presence of LaCuO3 perovskite catalyst(Inst Chemical Engineers, 2017) Palas, Burcu; Ersoz, Gulin; Atalay, SuheydaThe catalytic performance of LaCuO3 in photo Fenton-like oxidation of the food dye, Tartrazine was tested under visible and IN light irradiation. The influence of the initial pH, the initial hydrogen peroxide concentration ([H2O2)(o)), the catalyst loading and the source of light irradiation on Tartrazine degradation and decolorization were investigated sequentially. The initial Tartrazine concentration was kept constant at 100 ppm and the experiments were carried out for 120 min (the first 30 min in darkness and the next 90 min under visible or UV light irradiation). The optimum reaction conditions were determined as 50 degrees C of reaction temperature, 3 of pH, 8 mM of [H2O2](o), and 0.25 g/L of catalyst loading. Under the optimum conditions 46.6% degradation and 83.9% decolorization efficiencies were achieved under visible light irradiation whereas 64.4% degradation and 90.2% decolorization were accomplished under UV light irradiation. At the end of 120 min the copper leaching was determined to be 0.56 and 0.6 ppm under visible and UV light irradiation, respectively, and the toxicity were evaluated as 5.9% in terms of Lepidium satiuum root growth inhibition under the optimum reaction conditions. (C) 2017 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.Öğe Photo-degradation of sugar processing wastewater by copper doped bismuth oxyiodide: Assessment of treatment performance and kinetic studies(Academic Press Ltd- Elsevier Science Ltd, 2022) Tekin, Gulen; Ersoz, Gulin; Atalay, SuheydaIn this study, photo-Fenton-like oxidation method was evaluated for synthetic sugar industry wastewater using visible-light driven Cu-BiOI photocatalyst. Reaction conditions including initial pH, catalyst loading, initial hydrogen peroxide (H2O2) concentration, and temperature, were optimized. At these optimized conditions, the total saccharide concentration (TSC) and total organic carbon (TOC) removals were 56.20% and 30.67%, respectively whereas the maximum TSC and TOC removal reached up to 93.35% and 74.72% respectively by decreasing initial sucrose concentration. The kinetic study showed that the reaction order for sucrose and TOC oxidation was determined as 2 for pseudo-homogeneous power law models with respect to sucrose concentration and TOC, respectively.For heterogeneous models, Langmuir-Hinshelwood model based on the mechanism of adsorbed pollutant and oxidant on different catalytic sites was the best fit for oxidation of sucrose and other organic intermediates. According to the catalyst characterization studies, incorporation of copper was successful and Cu-BiOI possesses high photocatalytic activity accomplished by acid-assisted synthesis method.Öğe Photocatalytic activity of copper ferrite graphene oxide particles for an efficient catalytic degradation of Reactive Black 5 in water(Elsevier Sci Ltd, 2020) Kodasma, Rasmus; Palas, Burcu; Ersoz, Gulin; Atalay, SuheydaThe photocatalytic performance of copper ferrite graphene oxide catalyst, CFXGO (CF: Copper ferrite, CuFe2O4; GO: Graphene oxide; X: GO weight percentage) was tested for photo Fenton-like oxidation of Reactive Black 5 by using UV light irradiation. the effect of the graphene oxide content in the catalyst structure on dye removal efficiency was tested by comparing the performances of the catalysts with different weight ratios of graphene oxide varying between 5 and 90%. the catalysts were characterized by Scanning Electron Microscopy, X-Ray Diffraction, Brunauer-Emmett-Teller method, and, Vibrating Sample Magnetometer. the influences of catalyst loading, initial pH, and, the H2O2 concentration were investigated in the presence of GF90GO catalyst, which has 90% graphene oxide content. According to the parametric studies, 98.2% decolorization and 82.8% TOC removal efficiencies were achieved in 2 h for the treatment of 50 mg/L RB5 solutions when the catalyst loading, the initial pH, and, the initial hydrogen peroxide concentration were 0.275 g/L, 7, and, 5.5 mM, respectively.Öğe Photocatalytic activity of silver doped Self-Assembled supramolecular catalysts for amoxicillin Removal: Investigation of optimum conditions and reaction kinetics(Elsevier, 2024) Palas, Burcu; Ersoz, GulinSilver and cobalt doped perylene diimide supramolecular catalysts were prepared and their photocatalytic activities were tested for the removal of amoxicillin from aqueous solutions. Both bulk perylene diimide (PDI) and self-assembled perylene diimide (SA-PDI) were synthesized and silver or cobalt was doped at different weight ratios (1 % and 10 %). Among eight type of supramolecular catalysts, Ag1/SA-PDI was determined to be the most suitable photocatalyst. The effects of photocatalytic oxidation parameters including pH, catalyst loading, and the initial amoxicillin concentration were investigated by using response surface methodology. The photocatalytic reaction conditions were optimized at pH 4.6, 0.52 g/L catalyst loading, and 10.3 mg/L amoxicillin concen-tration. Under the optimum photocatalytic conditions 51.8 % amoxicillin removal efficiency was achieved. According to the radical trapping experiments, hydroxyl radicals were effective in antibiotic removal. Toxicity tests showed that L.sativum root growth inhibition was 1.1 % in treated antibiotic solutions. A kinetic study was realized to derive initial reaction rate expression. Antibiotic degradation in the presence of Ag1/SA-PDI fit second-order kinetic model. Arrhenius constant (frequency) and activation energy were calculated as 1.21 x 10(5) L.mg(-1).min(-1) and 49.7 kJ/mol, respectively.Öğe Photocatalytic and photo-Fenton-like degradation of methylparaben on monolith-supported perovskite-type catalysts(Taylor & Francis Inc, 2017) Orak, Ceren; Atalay, Suheyda; Ersoz, GulinMethylparaben was degraded in the presence of ABO(3) perovskite catalysts (A: La, Bi, and B: Ti-Fe, Fe) synthesized on a monolithic structure using the sol-gel method. The catalysts were characterized by BET, SEM, XRD, and FTIR. The highest degradation was observed using BiFeO3 on the monolithic structure. The methylparaben degradation and iron leaching were 82.8% and 0.06 ppm, respectively, under the optimum conditions, which were pH=7, [H2O2](0)=0.5 mM, and 0.1 g/L BiFeO3 loading. The toxicity tests were carried out by cress seeds and 1.09% inhibition was observed. Methylparaben degradation followed the second-order reaction kinetics, whereas the activation energy was 54 kJ/mol.