Yazar "Ozdemir, Celalettin" seçeneğine göre listele
Listeleniyor 1 - 16 / 16
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Color Removal from Synthetic Textile Wastewater by Sono-Fenton Process(WILEY, 2011) Ozdemir, Celalettin; Oden, Muhammed Kamil; Sahinkaya, Serkan; Kalipci, ErkanIn this study, the oxidative decolorization of C.I. reactive yellow 145 (RY 145) from synthetic textile wastewater including RY 145 and polyvinyl alcohol by Fenton and sono-Fenton processes which are the combination of Fenton process with ultrasound has been carried out. The effects of some operating parameters which are the initial pH of the solution, the initial concentration of Fe2+, H2O2, and the dye, temperature, and agitation speed on the color and chemical oxygen demand (COD) removals have been investigated. The optimum conditions have been found as [Fe2+] = 20 mg/L, [H2O2] 20 mg/L, pH 3 for Fenton process and [Fe2+] = 20 mg/L, [H2O2] 15 mg/L, pH 3 for sono-Fenton process by indirectly sonication at 35 kHz ultrasonic frequency and 80W ultrasonic power. The color and COD removal efficiencies have been obtained as 91 and 47% by Fenton process, and 95 and 51% by sono-Fenton processes, respectively. Kinetic studies have been performed for the decolorization of RY 145 under optimum conditions at room temperature. It has been determined that the decolorization has occurred rapidly by sono-Fenton process, compared to Fenton process.Öğe EVALUATION OF IRRIGATION WATER QUALITY OF AKSARAY REGION BY USING GEOGRAPHIC INFORMATION SYSTEM(NORTH UNIV BAIA MARE, 2012) Karadavut, Sedat; Delibas, Lokman; Kalipci, Erkan; Ozdemir, Celalettin; Karadavut, Ibrahim SametIn this study, the quality of irrigation water was determined in Aksaray region which is one of the most important agricultural lands of Turkey, the facts causing pollution were specified and the precautions that should be taken were discussed. Within the scope of this study, 38 samples were taken from the water of 24 wells, 4 dams, 9 ponds and 1 source water. In order to use the data more effectively, irrigation water quality index map of Aksaray region including the results of the samples (EC, SAR, B, Cl-, NO3-, HCO3- and pH) was prepared by using Geographic Information System (GIS). According to irrigation water quality index map, all surface water sources were found to be suitable for irrigation with high and medium irrigation water quality index. EC, SAR, Cl, HCO3 values were found as high in Acipinar well and Aratol well regions whereas EC and Cl values were high in Taspinar well region. It was determined that underground water sources have low irrigation water quality index value along in the range of Taspinar region and Tuz Lake whereas they have generally medium irrigation water quality index value. The soil being heavy-texture and salty structure in the region and the level of ground water being high were caused by lack of adequate drainage system. For this reason, good and adequate drainage system should be configured in order to provide no increase in salt accumulation in the soil, to get an opportunity for more appropriate land use and to increase the yield per unit area.Öğe Evaluation of manageable biological waste utilization of Konya in terms of environment and energy recovery(SILA SCIENCE, 2011) Kalipci, Erkan; Ozdemir, Celalettin; Sahinkaya, SerkanIn this study, it was aimed to determine the potential for energy production from biogas in Konya and to draw the attention of public opinion about the importance of generalization of biogas utilization in terms of both environment and energy recovery. In our research, biogas recovery was calculated depending on the number of available bovine, ovine and poultry indicated in Agriculture Master Plan of Konya by Ministry of Agriculture and Regional Affairs in 2004 as well as the potential of arable crops grown in Konya. As a result of this research, it was determined that totally 121,919,955.5 m(3)/year biogas could be obtained from agricultural products together with animal organic substances in Konya city. When this biogas (121,919,955.5 m(3)/year) is evaluated instead of petroleum utilization, it was determined that CO2 emission will be reduced in an amount of 316,991,884.3 kg/year. In Konya, it was also indicated that totally 2,343,332.1 tons/year fertilizers including 1,157,220 tons/year fertilizer from bovines, 925,998.5 tons/year fertilizer from ovine and 260,113.59 tons/year fertilizer from poultry can be obtained. Both chemical fertilizer utilizations will be significantly reduced and efficiency in agriculture will be improved by using this kind of fertilizer in agriculture. When the electrical energy equivalence (kWh/day) of biogas was calculated, it was determined that 1,444,563.8 kWh/day electrical energy saving will be supplied which includes 491,737.5 kWh/day from bovine, 691,576.8 kWh/day from ovine and 261,249.5 kWh/day from poultry. Approximately 16,003 m(3) methane gas will be obtained from barley, wheat, corn straw as well as clover, sainfoin and vetch in Konya. Since 1 m(3) methane gas is enough for cooking of a five-member family, the cooking need of around 16,000 families a day will be met by this potential. When animal potential and agricultural area in our country are taken into consideration, it's apparent that there will be many benefits in terms of sustainable ecological balance, economical income and clean energy recovery by generalizing the biogas plants especially in rural areas.Öğe HEAVY METAL ACCUMULATION IN THE SHEEP BLOOD GROWING AROUND SIZMA REGION(HEALTH & ENVIRONMENT ASSOC, 2016) Gokturk, Fatih Ahmet; Ozdemir, CelalettinMining activities have been the main requirements of the civilizations since first centuries. There are several deformations of the natural environment created in the areas in which mining activities mostly have been done. The negative effects of the mining activities are getting decrease nowadays. However, old mines still spread dangerous compounds to the environment close to the mining area. Especially heavy metals are one of the most dangerous factor causing environmental pollution. Heavy metals create flora and fauna pollution with the effects of air, water and soil. Within these metals mercury is the most dangerous one because of its highly toxic content and accumulation feature in the living forms. Some limitations have been applied to the production of this metal for preventing negative effects on the natural environment. Mercury mines also include some other metals like antimony and zinc. The working area of this study was chosen considering this information. Sizma region was selected as working area which is located in the north part of Konya. There is old mercury mine closed in 1993 after 25 year of production period. Investigation of mercury and related metals in the sheep blood and evaluation of environment which is close to the mine area are the main purposes of this study.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 Investigation of the ecotoxicologic effect of pesticide industry wastewater on the pancreas and liver of rats(ACADEMIC JOURNALS, 2011) Kalipci, Erkan; Ozdemir, CelalettinIn this study, when the raw wastewater, which resulted from the manufacturing of 2,4-dichlorophenoxyacetic acid (2,4-D) dimethylamine salt and 2,4-D acid isooctylester herbicides in the factory, was discharged to the ecosystem without treatment, its ecotoxic effect on the pancreas and liver of rats was investigated. In this research, 16 Wistar Albino race male rats were grouped into two (Group 1-control, n = 8; Group 2-wastewater, n = 8) and were then used. The rats in Group 1 were fed by standard feed, while rats in Group 2 were fed by a diet including 200 mg/kg/day factory composite raw wastewater for 16 weeks, and dissection was carried out for all of them. In the research, it was determined that the body, liver and pancreas weights of rats were decreased when compared to the control group; however, there was no significant statistical difference (P > 0.05) between the two groups. In the histopathological investigation, on the other hand, it was determined that atypical cell focuses (ACF) (neoplastic variations) were observed in the liver and pancreas of rats in Group 2 and the quantitative analysis of the ACF was performed. In the livers of rats in Group 2, dilation in sinusoids close to the vein centralis and hydropic degeneration in parenchyma were observed when compared to the control group. Since there is a possibility that the neoplastic variations caused by this wastewater could be transformed into adenoma or carcinoma during long-term treatment, it also seems possible that it could be carcinogenic.Öğe Methane production from anaerobic treatment of volatile organic compounds(MULTI SCIENCE PUBL CO LTD, 2006) Ozdemir, Celalettin; Dursun, Sukru; Sen, NejdetWorldwide increasing energy problems prompts researchers to find new and renewable energy sources. There are many new studies on energy investigation using different materials and technology. These studies were quite important for continuing development, comfortable life and industrial improvement. This investigation considers the removal of volatile organic compounds frequently found in many wastewaters and methane production following the wastewater treatment. The study was performed on the up flow anaerobic condition sludge blanket reactors. Used volatile organic compounds are trichloroethylene, chloroform, dichloromethane, and TCE. Removal ratio of these compounds were 87.8% trichloroethylene, 96.5% chloroform, 67.1% dichloromethane, and 97.3% tetrachlorethylene. Methane ratios in the gas production were 67.1% for TCE, 72.4% for chloroform, 69.6% dichloromethane and 69.8% tetrachlorethylene.Öğe Methane production from anaerobic treatment of volatile organic compounds (VOC)(MULTI-SCIENCE PUBL CO LTD, 2006) Ozdemir, Celalettin; Dursun, Sukru; Sen, NejdetWorldwide increasing energy problems guided to workers to find new and renewable energy sources. There are many new studies on energy investigation using different materials and technology. These studies were quite important for continuing development, comfortable life and industrial improvement. This investigation is considerable for removal of volatile organic compounds (VOC) frequently found in many wastewaters and methane production behind the wastewater treatment. The study performed in the up flow anaerobic condition sludge blanket (UASB) rectors. Used VOC's are trichloroethylene, chloroform, dichloromethane and tetrachlorethylene. Removal ratio of these compounds were 87.8% trichloroethylene (TCE), 96.5% chloroform (CF), 67.1% dichloromethane (DCM) and 97.3% tetrachlorethylene (PCE). Methane ratios in the gas production were 67.1% for trichloroethylene (TCE), 72.4% for chloroform (CF), 69.6% dichloromethane (DCM) and 69.8% tetrachlorethylene (PCE).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 Pollution in Melendiz Water Basin Groundwater(HARD, 2012) Karadavut, I. Samet; Saydam, A. Cemal; Kalipci, Erkan; Karadavut, Sedat; Ozdemir, Celalettin; Durduran, SavasIn our study, samples were taken from the groundwater that is used for drinking and irrigation in the Melendiz Water Basin, and the quality of water and the factors causing pollution were determined by evaluating them according to "Continental Water Sources Quality Classification Criterions" (Republic of Turkey Ministry of Environment and Forest/Regulation for Water Pollution Control). When the analysis results of samples taken between 2006 and 2009 were compared, it was determined that the amount of pollution increased in time. Moreover, the seasonal variations of ground water quality criterions were determined and the precautions that should be taken to minimize this pollution were discussed.Öğe Reaction kinetics and removal of COD with treatment of TCE with the synthetic wastewater in UASB reactors(SILA SCIENCE, 2012) Ozdemir, Celalettin; Sen, Nejdet; Kalipci, ErkanThe aim of this work was to treat chloroforms (CFs) by upflow anaerobic sludge bed reactors (UASB) and to determine Chemical Oxygen Demand (COD) % removal. The aim of this study was to investigate biological treatment of CFs in high flow rate reactors. Resistance capacity of microorganisms was investigated in a UASB designed as automated control system by feeding with addition of co-substrate, by loading different ratio of organic matter and VOCs, hydraulic retention time, at stable condition of Chemical Oxygen Demand (COD), Volatile Fatty Acids (VFA), pH, alkalinity, temperature (35 degrees C) etc. during the anaerobic treatment. The resulting removal rates for chloroform ranged between 60-70% of COD. The chloroform decomposition ratio was approximately 96%. The highest methane ratio in the obtained biogas was 68.6% for CF. Also inhibition concentrations (IC) in 24 hour were determined as IC50; 27.8 mg/L and IC25; 7.4 mg/L.Öğe A RESEARCH FOR WATER POLLUTION OF MELENDIZ STREAM IN TERMS OF SUSTAINABILITY OF ECOLOGICAL BALANCE(NORTH UNIV BAIA MARE, 2011) Karadavut, Ibrahim Samet; Saydam, Ahmet Cemal; Kalipci, Erkan; Karadavut, Sedat; Ozdemir, CelalettinIn order to provide the continuity of ecological balance, the presence of water as well as its quality is of capital importance. In this study; a research was carried out about the water pollution in Melendiz stream which feeds the Mamasun dam and meets the drinking and usage water need of Aksaray Plain and its environment. The samples were taken from totally 14 stations between 2006 and 2009 (February, June, September, December) throughout the whole study. These samples were analyzed in terms of 22 parameters, its water quality was determined by evaluating according to "Continental Water Sources Quality Classification Criterions" (Republic of Turkey Ministry of Environment and Forest / Regulation for Water Pollution Control) and thus the factors that cause pollution in Melendiz stream were determined. Moreover, the seasonal variations in quality criterions of Melendiz stream were determined and the precautions necessary to minimize the pollution were discussed. As a result of the research; the effects of domestic wastewater, thermal spring wastewater and wastewater of touristic plants as point pollution sources and agricultural drainage water as a common source were determined. In point sources, organic substances and nitrite were determined whereas, nitrate pollution related with excess fertilizer usage was determined in common sources. The concentrations of these parameters increased especially in dry spells and caused a certain decrease in water quality. According to continental water quality classification criterions, the surface water had IIIrd and IVth class water property in terms of especially nitrate, nitrite and total nitrogen and IInd class water property in terms of other parameters. When the analysis results of samples taken between 2006 and 2009 were compared, it was determined that the amount of pollution increased in time. It was also observed that the surface water of Melendiz stream was exposed to pollution by point and common sources and the quality of water decreased gradually.Öğe The sonochemical decolorisation of textile azo dye CI Reactive Orange 127(WILEY-BLACKWELL, 2011) Ozdemir, Celalettin; Oden, Muhammed K.; Sahinkaya, Serkan; Guclu, DunyaminIn the present study, Fenton and sono-Fenton processes were applied to the oxidative decolorisation of synthetic textile wastewater including CI Reactive Orange 127 and polyvinyl alcohol. Process optimisation [pH, ferrous ion (Fe(2+)) and hydrogen peroxide (H(2)O(2))], kinetic studies and their comparison were carried out for both of the processes. The sono-Fenton process was performed by indirect sonication in an ultrasonic water bath, which was operated at a fixed 35-kHz frequency and 80 W power. The optimum conditions were determined as [Fe(2+)] = 20 mg l(-1), [H(2)O(2)]= 15 mg l(-1) and pH = 3 for the Fenton process and [Fe(2+)] = 25 mg l(-1), [H(2)O(2)] = 5 mg l(-1) and pH = 3 for the sono-Fenton process. The colour removals were 89.9% and 91.8% by the Fenton and sono-Fenton processes, respectively. The highest decolorisation was achieved by the sono-Fenton process because of the production of some oxidising agents as a result of sonication. Consequently, ultrasonic irradiation in the sono-Fenton process slightly increased the colour removal to 91.8%, while decreasing the hydrogen peroxide dosage to one-third of that of the Fenton process.Öğe TREATMENT OF COD WITH REMOVAL OF DICHLOROMETHANE AND CARBON TETRACHLORIDE IN THE WASTEWATER WITH UASB(INT SCIENTIFIC CONFERENCE SGEM, 2008) Ozdemir, Celalettin; Sen, Nejdet; Dursun, Sukru; Tezcan, HayrunnisaLow concentration of chlorinates maybe found in wastewater, contaminated soils and air due to different industrial sources. Low level of Volatile Organic Compounds (VOC)'s could be removed by adsorption, incineration and biofiltration methods. These methods have some disadvantages such as removal efficiency or high operation cost. Chlorine has been removed from the chlorinated aliphatic compounds under anaerobic conditions. The aim of this study was to investigate biological treatment of DCM and CT in high flow speed reactors. Resistance capacity of microorganisms was investigated ill a designed UASB auto control system by feeding with addition of co-substrate, by loading different ratio of organic matter and VOC's, hydraulic retention time, at stable condition of COD, Volatile Fatty Acids (VFA), pH, alkalinity, temperature (35 degrees C) etc. during the anaerobic treatment. In this study, removals of DCM and CT were approximately 60 - 70 % and 98 %, respectively. At different DCM and CT doses, the highest removal efficiencies were 77,4% COD for DCM and 99,5% COD for CT, respectively.Öğe Treatment of pesticide wastewater by physicochemical and Fenton processes(ASIAN JOURNAL OF CHEMISTRY, 2008) Ozdemir, Celalettin; Sahinkaya, Serkan; Onucyildiz, MustafaThe process of pesticide removal from industrial wastewater using which chemical, vacuum-chemical and Fenton's reactions have been analyzed. Fenton process is attractive alternative to conventional oxidation processes in effluent treatment of recalcitrant compounds. The aim of this study is to evaluate the efficiency of chemical, vacuum and Fenton processes for the reduction of chemical oxygen demand in wastewaters from pesticide industry. In this study wastewater from pesticide industry was used. Whereas in the chemical procedure [Ca(OH)(2) and KMnO4], the chemical oxygen demand removal efficiency is 94.9%; in the vacuum-Ca(OH)(2) + KMnO4 system (with 250 mg/L KMnO4, 1 mL H2SO4, 5 mg/L polyelectrolyte and 2000 mg/L CaOH application) this efficiency was 97.8%; and a 99.8% KOI removal efficiency was obtained by the Fenton process (the optimum ratio of [Fe2+] to [H2O2] was 1:1.56 (mM/mM), at pH 3.0).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.