Yazarlar
- Kul, Sinan(13)
- Yıldırım, Ümit(9)
- Duran, Celal(6)
- Serencam, Huseyin(6)
- Ekmekyapar Torun, Fatma(5)
- Eryılmaz Türkkan, Gökçen(5)
- Güven, Onur(5)
- Kurt, Mehmet Ali(5)
- Ozdes, Duygu(5)
- Cengiz, Ibrahim(4)
- Torun, Fatma Ekmekyapar(4)
- İrdemez, Şahset(4)
- Bingül, Züleyha(3)
- Boncukcuoğlu, Recep(3)
- Guler, Cuneyt(3)
- Hırca, Tuğçe(3)
- Jomaa, Seifeddine(3)
- Niazkar, Majid(3)
- Nuhoglu, Alper(3)
- Nuhoğlu, Alper(3)
- Serencam, Hüseyin(3)
- Teke, Çağatay(3)
- Tufekci, Mehmet(3)
- Uçurum, Metin(3)
- Yildiz, Ergun(3)
- Özdemir, Akın(3)
- Celebi, Neslihan(2)
- Cengiz, İbrahim(2)
- Degermenci, Nejdet(2)
- Demircioğlu, Nuhi(2)
- Gundogdu, Ali(2)
- Güler, Cüneyt(2)
- Kalkan, Ekrem(2)
- Karakaş, İbrahim Hakkı(2)
- Karcioğlu Karakaş, Zeynep(2)
- Korkmaz, Serdar(2)
- Korkmaz, Serol(2)
- Kul, S.(2)
- Nadaroglu, Hayrunnisa(2)
- Reçber, Züleyha(2)
Yayınlar
- MakaleAçık Erişim2021Scopus SJRQ1Removal of Cu(II) from aqueous solutions using modified sewage sludge ash
Kul, S.
The study aims to determine Cu(II) adsorption from wastewater in the laboratory condition using modified sewage sludge ash as adsorbent which was obtained from a thermal drying and incineration facility. This procedure was completed with an inexpensive pollutant material which has high metal-binding capacity and is available in abundant amounts. During experiments, the effects of particle size, pH, stirring speed, initial ion concentration, adsorbent dosage and temperature were investigated. Adsorption equilibrium was obtained in 10 min. Maximum Cu(II) removal was calculated as 83.63% with 20 mg L−1 initial Cu(II) ion concentration and 5 g L−1 adsorbent dosage. Kolmogorov–Smirnov normality test was performed to test the conformity of the data obtained as a result of the study to variance analysis, and it was determined that the data were distributed normally (p > 0.05). Levene test was performed for homogeneity test, and it was determined that the data were distributed homogeneously (p > 0.05). Langmuir was determined as the most suitable isotherm model for Cu(II) adsorption. Adsorption kinetics abided by the pseudo-second-order model. Based on kinetic studies, the adsorption process was endothermic with maximum adsorption capacity calculated as 7.53 mg g−1. The results of thermodynamic research showed the adsorption reaction was spontaneous (ΔG° < 0), endothermic (ΔH° > 0) and reversible (ΔS° > 0 and close to zero).
AtıfScopus10WoS10OpenAlex12
İncele - MakaleAçık Erişim2021Scopus SJRQ2Relationship between hydraulic and geoelectrical parameters for alluvial aquifers in Bursa, Turkey—a case study
Eryılmaz Türkkan, Gökçen; Korkmaz, Serdar
This research aims at analyzing the relationship between the hydraulic conductivity and the formation factor in alluvial aquifers. The study was conducted on the alluvial aquifers within the province of Bursa, Turkey. Field surveys were carried out on 12 different locations each having alluvial formation. Initially, slug tests were applied at the wells and hydraulic conductivity values were calculated by using Bouwer-Rice and Dagan analytic methods. Afterwards, vertical electrical sounding method with Schlumberger array was applied on these locations to obtain apparent resistivity. These values were then converted to real resistivity under IPI2WIN software. Water samples were taken from the wells, and their electrical conductivity values were measured in the laboratory which were converted to water resistivity. Finally, formation factor was calculated as a ratio of real resistivity to water resistivity. The variations of hydraulic conductivity and transmissivity values against the formation factor were examined, and a linear relation was observed. Furthermore, their variations against modified formation factor and modified aquifer resistivity were also investigated and similarly linear relationships were observed. The graphs obtained conform to the results of similar studies in literature and will serve as a guideline for prospective groundwater research in the study area.
AtıfScopus3OpenAlex2İncele - MakaleAçık Erişim2021Scopus SJRQ1Pb (II) biosorption from the aqueous solutions by raw and modified tea factory waste (TFW)
Nuhoğlu, Y.; Ekmekyapar Kul, Z.; Kul, S.; Nuhoğlu, Ç.; Ekmekyapar Torun, F.
The study is aimed to determine Pb (II) biosorption from synthetic wastewaters using natural and modified tea factory waste as biosorbent material. This process is carried out with this waste matter, which is found in large quantities, so cheap and has high metal adsorption ability. The sorption kinetic studies were determined as variations of initial pH value, particle size, initial Pb (II) and tea factory waste concentrations, stirring speed and temperature. Biosorption reached the equilibrium in 15 min. Zeta potential values of the biosorbent were defined in the range of pH 2 to 4. The adsorption isotherm models give the experimental values, and the thermodynamic characteristics of the patterns generally give insight about the sorption mechanism depending on the surface characteristics and affinity of the biosorbent. The biosorption mechanism was searched considering to Freundlich, Langmuir, BET and Temkin isotherm model, and the experimental adsorption values were conformed to Freundlich adsorption model. The optimum experimental conditions were investigated as pH 3.5, particle size of 0.125–0.25 mm, stirring speed of 200 rpm, biosorbent concentration of 7 g L−1 and 25 °C. In these conditions, the highest efficiency of biosorption was obtained as 94.07% and after the activating process the efficiency was reached to 97.73% at 70 mg L−1. The maximum Pb (II) removal capacity of raw tea factory waste was found to be 22.111 mg g−1 at 200 mg L−1. The biosorption kinetics has complied with the pseudo-second-order model. Thermodynamic studies stated that this biosorption phenomenon was an endothermic process.
AtıfScopus26WoS26OpenAlex27İncele - MakaleAçık Erişim2020Zeytin Karasuyunun İleri Oksidasyon Prosesleri İle Arıtımının İncelenmesi
Cengiz, Ibrahim; Kul, Sinan; Torun, Fatma Ekmekyapar
Bu çalışmada, Balıkesir ilinde faaliyet gösteren bir zeytinyağı üretim tesisinden temin edilen zeytin karasuyunun arıtımında ozon (O3), ozon+hidrojen peroksit (O3+H2O2) ve fenton (Fe2++H2O2) proseslerinin etkinlikleri incelenmiştir. İlk olarak %10 kapasite ile O3 jeneratörü çalıştırılmış ve 3 farklı pH (4.75, 10 ve 11) değerinde 6 saat boyunca ozonlama işlemi gerçekleştirilmiş ve maksimum giderim verimi pH değeri 11 olarak ayarlandığında %15.27 olarak hesaplanmıştır. İkinci olarak %10 kapasite ile O3 jeneratörü çalıştırılmış ve ortama 500 mg L-1 H2O2 ilave edilmiştir. 6 saatlik bu deneme sonrasında giderim verimi %9.8 olarak gerçekleşmiştir. Son olarak zeytin karasuyunun arıtımı için farklı Fe2+ (2.014 g L-1 ve 4.028 g L-1) ve H2O2 (19.05, 44.44 ve 80 g L-1) konsantrasyonlarının etkilerinin incelendiği fenton prosesinde Fe2+ ve H2O2 konsantrasyonları arttığında deney sonunda ortamda kalan KOİ konsantrasyonları sürekli azalmıştır. Fe2+ konsantrasyonu 4.029 mg L-1 ve H2O2 konsantrasyonu 80 mg L-1 olarak ayarlanmış ve %81.94 oranında KOİ giderimi sağlanmıştır. Elde edilen sonuçlar fenton prosesinin, diğer proseslerden çok daha fazla etkinliğinin olduğunu ortaya çıkarmıştır.
AtıfOpenAlex2
İncele - MakaleAçık Erişim2020İçme Suyu Şebeke Hattının Farklı Boru Tipleri İçin Tasarımı ve Maliyeti: Erzurum İli Horasan İlçesi Örneği
Türkkan, Gokçen Eryılmaz; Atakul, Fatih
Günümüzde nüfusun artmasından dolayı yaşam alanları genişlemekte olup, mevcut kullanılmakta olan içme suyuşebeke sistemleri yetersiz kalabilmektedir. Yapılacak olan içme suyu projelerinin en uygun şekilde hidrolikhesaplarının yapılması ve boyutlandırılması, maliyetin optimum seviyelere düşmesine imkan sağlayacaktır. Bunabağlı olarak ülke ekonomisine katkı sağlanabilecektir. Bu çalışmada İller Bankası Teknik Şartnamesindebelirtilen kriterler göz önüne alınarak içme suyu şebekesi için Netcad yazılımının içerisinde bulunan ölü noktalaryöntemi ile hidrolik hesaplamalar yapılmıştır. Boru tipinin maliyete etkisi araştırılmıştır. Polietilen, polivinilklorür, çelik ve düktil borular kullanılarak hidrolik hesaplamalar gerçekleştirilmiştir. En yüksek maliyetliborunun çelik, en düşük maliyetli borunun ise polietilen boru olduğu belirlenmiştir.
AtıfOpenAlex2TR Dizin2İncele - MakaleYalnız künye2020Kaynağından Akdeniz’e Deliçay’ın (Mersin) Debisi ve Su Kalitesinin Değerlendirilmesi
Yıldırım, Ümit; Guler, Cuneyt; Kurt, Mehmet Ali; Güven, Onur
Bu çalışmada, Orta Toroslardaki Güzelyayla (Mersin) yerleşimi yakınlarında doğan ve Akdeniz’e dökülen Deliçay’ın,kaynağı ile boşalım noktası arasında belirlenen 11 farklı lokasyonda, akarsu debisi belirlenmiş ve akış yolu boyunca sukimyasında meydana gelen değişimleri ortaya koymak amacıyla yerinde fiziksel parametre ölçümleri yapılarak suörnekleri alınmıştır. Alınan su örneklerinin majör anyon/katyon ve iz element içerikleri laboratuvarda spektrofotometre,iyon kromatografisi, titrasyon ve ICP-MS yöntemleri kullanılarak analiz edilmiştir. Elde edilen sonuçlar, çeşitli grafikyöntemler kullanılarak değerlendirilmiş ve tarımsal sulama amaçlı kullanıma uygunlukları değerlendirilmiştir.Değerlendirmeler sonucunda; Deliçay’dan alınan tüm su örneklerinin tarımsal sulama amaçlı kullanıma uygun olduğutespit edilmiştir. Akarsu örneklerinde kirlilik göstergesi olabilecek parametrelerin ise havza çıkış noktasına doğru artışgösterdiği ve bu artışın sebebinin tarımda kullanılan çeşitli kimyasallar (gübreler ve tarımsal ilaçlar) ileevsel/endüstriyel atıkların akarsuya kontrolsüz deşarjı olduğu sonucuna varılmıştır.
AtıfOpenAlex10TR Dizin11İncele - MakaleAçık Erişim2020Scopus SJRQ2Removal Kinetics of Olive-Mill Wastewater in a Batch-Operated Aerobic Bioreactor
Kul, Sinan; Nuhoglu, Alper
This study involves the removal of the olive-mill wastewater (OMW), which is a significant pollutant, in a batch reactor under aerobic conditions by mixed cultures. It also includes comparison of different substrate inhibition models, calculation of kinetic parameters, and testing the merit of the chosen mathematical model with respect to OMW concentration and changes with time. Average initial microorganism concentration (X0) in the batch reactor was 100 +/- 15 mg L-1. During the study the treatment of OMW with initial chemical oxygen demand (S0) concentration between 10 and 1,000 mg COD L-1 was investigated. Maximum specific growth rate (mu max) was reached with 130 mg COD L-1 initial concentration and 3 h experimental duration produced 57.17% chemical oxygen demand (COD) removal efficiency. Other experiments with increasing initial concentration increased COD removal duration, with 927 mg COD L-1 initial concentration regressing to 8.88% removal efficiency after 3 h. The biokinetic equations of Aiba, Haldane, Tseng, and Yano and Koga were chosen to relate S0 concentration to specific growth rate (mu) and the biokinetic parameters in these equations were calculated. The most appropriate biokinetic equation was the Haldane model in terms of R2 value and the Haldane equation parameters 0.43 h-1, 45.34 mg L-1, and 207.97 mg L-1 were calculated for mu max, half-saturation constant (Ks) and inhibition constant (Ki), respectively. Also, a mathematical biokinetic model including the Haldane equation was used to test the OMW removal performance and it was seen that the chosen model was well able to reflect system behavior. After the calibration of mu max, the most-sensitive parameter of the Haldane model, to 0.22 h-1, the model gave a better fit for all tested conditions.
AtıfWoS2OpenAlex7İncele - MakaleAçık Erişim2020Characterization of pistachio processing industry wastewater and investigation of chemical pretreatment
Tırınk, Sevtap; Nuhoğlu, Alper; Kul, Sinan
This study was carried out in two stages; in the first stage of the study, wastewater characterization of wastewater originating from the pistachio industry was primarily completed, and in the second stage, chemical pre-treatment studies were completed. Pistachio wastewater used in the study was obtained from a pistachio processing factory located in Gaziantep province. In chemical treatment studies, montmorillonite clay, AlCl3, Al2(SO4)3, Fe2(SO4)3 and FeCl3 were used as coagulants. As a result of chemical treatability tests, AlCl3 was determined to be the best coagulant. With AlCl3 at optimum dosage and optimum pH value, 99.6% suspended solid (SS) removal efficiency, 65.8% chemical oxygen demand (COD) removal efficiency and 85.5% total phenol (TP) removal efficiency were obtained.
AtıfScopus7OpenAlex9TR Dizin2İncele - MakaleYalnız künye2020Scopus SJRQ1Azo dye-functionalized magnetic Fe3O4/polyacrylic acid nanoadsorbent for removal of lead (II) ions
Sadak, Omer; Hackney, Robert; Sundramoorthy, Ashok K.; Yilmaz, Galip; Gunasekaran, Sundaram
We report the fabrication of a nanoadsorbent for the removal of heavy metals. The nanoadsorbent is comprised of ferric oxide (Fe3O4) magnetic nanoparticles (MNPs) covalently conjugated with polyacrylic acid (PAA) and further functionalized with an azo dye (Congo red, CR) using carbodiimide. This Fe3O4 core and PAA-CR shell system (MNP/PAA-CR) exhibited binding affinity towards various cations (Pb2+, Fe2+, Fe3+, Cd2+, and Cu2+) at room temperature. Using MNP/PAA-CR we studied its heavy metal removal effectiveness and kinetics targeting Pb2+ under various reactions conditions including time and pH. The Pb2+ removal efficiency and adsorption capacity were maximal at pH 6.5 and 45 min of reaction time, and the Pb2+ adsorption kinetics better fit a pseudo second-order model than a first-order model. The adsorption of Pb2+ by MNP/PAA-CR was also investigated by the so-called Langmuir and Freundlich isotherms, and the Langmuir isotherm predicted a maximum absorption of 195.3 mg.g-1. Our results further indicated that MNP/PAA-CR is potentially reusable after desorption of the adsorbed metal with only small decline in adsorption ability over five consecutive cycles of regeneration.
AtıfScopus26OpenAlex17İncele - MakaleAçık Erişim2020Scopus SJRQ2A visual application for teaching pipe flow optimization in engineering curricula
Türkkan, Yusuf Alptekin; Eryılmaz Türkkan, Gökçen; Yılmaz, Hamid
The main purpose of this study is to investigate the importance of programming in the learning and understanding of water distribution networks. This paper presents the implementation of a programming language C# for applications for teaching water distribution networks calculations at both undergraduate and graduate levels. A user's guide is also prepared for the software which includes the theory of hydraulic and optimization calculations. There are many ways to design water distribution networks. Hardy Cross method is very often used for optimization of networks. Thus, Hardy Cross optimization method was preferred in this study. It is a perfect study to implement as an educational tool at undergraduate and graduate levels of education.
AtıfScopus12WoS10OpenAlex12İncele - MakaleYalnız künye2020Scopus SJRQ1Comparison of phenol removal with ozonation in jet loop reactor and bubble column
Barlak, Melahat Semin; Degermenci, Nejdet; Cengiz, Ibrahim; Ucun Özel, Handan; Yildiz, Ergun
This study aimed to remove phenol with ozonation in a jet loop reactor (JLR) and a bubble column (BC). In the first stage of the study, the mass transfer properties of JLR were determined and superiority over BC reactors were shown, and in the second stage, these reactors were used in phenol removal studies. At the same conditions, the volumetric mass transfer coefficient of JLR was 0.540 min-1, while this value was determined as 0.246 min-1 in the BC reactor. In phenol removal, the effects of initial phenol concentration, ozone dosage and pH on phenol and chemical oxygen demand (COD) removal were determined for both JLR and BC. While the pseudo-first rate constant for phenol removal in JLR at 221 mg/min ozone dosage was 0.1756 min-1, this value was only calculated as 0.1157 min-1 in the BC reactor. As a result, it has been shown that JLRs can achieve higher ozone gas transfer with lower energy consumption and perform more effective phenol and COD removal than BC reactors, especially at low pH and high ozone dosages.
AtıfScopus40WoS36OpenAlex39İncele - MakaleAçık Erişim2020Scopus SJRQ1Investigation of ammonia stripping with a hydrodynamic cavitation reactor
Taşdemir, Atila; Cengiz, İbrahim; Yildiz, Ergün; Bayhan, Yalçın Kemal
Ammonia is a commonly used compound in the domestic and industrial fields. If ammonia found in wastewater after use is not treated, even at low concentrations it may cause toxic effects in the receiving environment. In this study, a hydrodynamic cavitation reactor (HDC) was designed with the aim of removing ammonia. The effect of parameters like different cavitation numbers, airflow, temperature and initial concentration on NH3 removal was researched. The potential of hydrodynamic cavitation for removal of volatile gases, like NH3, was assessed with the aid of two film theory mathematical equations. Experimental studies were performed at fixed pH = 11. Under the conditions of 0.12 cavitation number, 25 L/min airflow, 30 °C temperature and 2500 mg/L initial concentration, in 24 h 98.4% NH3 removal efficiency was achieved. With the same experimental conditions without any air, the HDC reactor provided 89.5% NH3 removal at the end of 24 h. The HDC reactor is very effective for the removal of volatile gases from wastewater and it was concluded that even in the absence of aeration, the desired NH3 removal efficiency was provided.
AtıfScopus31WoS27OpenAlex33
İncele - MakaleAçık Erişim2019An evaluatıon on relocatıon and exproprıatıon problem caused by dam project ın çoruh valley
Yıldız, Seçil Gül Meydan; Şengün, Hayriye
Dam Projects occupy a significant part of the public investments in Turkey. The dams have an important role in efficient use of the water as a source of life beside usage of it as a renewable energy source. Physical, social, economical and environmental problems emerge during and after construction of the dams for power generation and irrigation purposes. In order to minimize negative influences of investment projects to be realized by collective expropriation in the scope of public investments, execution of relocation applications additional to expropriation or as an alternative of expropriation procedure has become an inevitable socioeconomical fact. Changing of settlement areas located in the reservoir fields of the dams and expropriation of the affected private lands are leading significant social and physical problems. Relocation of the families whose settlements (properties) are expropriated, the projects applied in new settlement areas, rearrangement of economical and social life are problematic processes taking time and requiring huge economic resources. Beside relocation problems, changes occur in eco systems because of the dams. In this study, relocation and expropriation problems caused by Artvin, Muratlı, Deriner, Borçka and Yusufeli dams which are among the dam Projects in the valley of Çoruh shall be studied using literature review method.
AtıfOpenAlex2TR Dizin1İncele - MakaleAçık Erişim2019Capacity Factor Analysis in Small Scale Hydropower Plants and a Practice Specific to Giresun
Serencam, Uğur
Energy is the fundamental element of social and economic sustainability in every aspect of life, from the smallest living body to large scale industrial facilities. In Turkey rapidly increasing industrial development process lead to extensive energy demand, which is met largely from imported fossil sources. Especially in recent years, as a result of increasing environmental awareness and economic and strategic reasons, a portion of the energy deficit is fed from, clean and reliable hydroelectric power plants with great importance. In our country, a total of 295511 GWh electricity was produced in 2017. About 41368 GWh (14%) of the total amount was generated by large hydraulic plants and 17082 GWh (5.78%) by small hydraulic plants. In this study, small hydroelectric power (SHP) stations are considered to reduce the increasing energy cost and for this purpose SHP in Giresun are analyzed leading to private additives in the capacity factor analysis. According to the results it is possible to conclude that thetime of power plant investment is shortened as the capacity factor increases in hydroelectric power plants.
AtıfOpenAlex2TR Dizin1İncele - MakaleAçık Erişim2019Scopus SJRQ2Modeling design parameters with taguchi experimental method for obtaining operating conditions for cu(Ii) removal through adsorption process
Serencam, Hüseyin; Özdemir, Akın; Teke, Çağatay; Uçurum, Metin
One of the environmental concerns deals with the removal process of pollutants in water and wastewater. In this paper, a removal process was used to eliminate pollutants in water and wastewater. The aim of this paper was to obtain an optimum adsorption condition for the highest metal ions adsorbed (MIA) mg/g. For this particular purpose, a Taguchi L18 design was conducted. In addition, the signal-to-noise ratio was analyzed for optimum adsorption levels. The analysis of variance was also performed to evaluate the effect of each adsorption condition on MIA (mg/g) values. Moreover, an optimization model was also proposed to find the best optimal setting of adsorption levels. Then, the confirmation tests were performed using optimum coded levels of the adsorption parameters for the verification purpose. The results of the experimental study showed a good performance that Cu(II) removal capacity was found to be 43.66 mg/g. To the best of our knowledge, this research is the first to study natural stone as an efficient, inexpensive and cheap adsorbent for the removal process.
AtıfScopus6WoS5OpenAlex6İncele - MakaleAçık Erişim2019Scopus SJRQ2Innovative trend analysis of total annual rainfall and temperature variability case study: Yesilirmak region, Turkey
Serencam, Uğur
It is well known that any kind of ordinary hydrometeorological parameter trend may have increasing or decreasing tendency systematically. Various methodologies are developed for possible trend identification such as the well-known Mann-Kendall test and recently Şen innovative trend analysis (ITA) approaches. The former has a set of assumptions, whereas the latter is almost without any restrictive assumption. The main purpose of this paper is to present precipitation and temperature trend behaviors by applying ITA in Yesilirmak drainage basin. Selected observation stations are mainly located at the Black Sea confluence region of Yesilirmak while few others at the middle and upper drainage basins. ITA provided visual inspection with quantitative trend slopes distinctively for low, medium, and high sub-levels with physical interpretations. Based on categorization, precipitation records have significant decreasing trends in low, medium, and high levels as an average − 3.4%, − 3.8%, and − 2.4%, respectively. In contrary to precipitation trend, and consistent to global expectation in climate change, temperature records have significantly strong increasing tendency along the basin. In sub-level of temperature, this strong trend tendencies are detected + 4.6%, + 4.8%, and + 7.2% from low to high ranges, respectively.
AtıfScopus40WoS36OpenAlex45İncele - MakaleAçık Erişim2019Scopus SJRQ2Antimony removal from aqueous solutions using magnetic nickel ferrite (NiFe 2 O 4 ) nanoparticles
Karcioğlu Karakaş, Zeynep; Boncukcuoğlu, Recep; Karakaş, İbrahim Hakkı
In this study, magnetic nickel ferrite (NiFe 2 O 4 ) nanoparticles were synthesized via microwave assisted combustion method and these particles were used as adsorbent for antimony removal. The most effective parameters for the removal efficiency are adsorbent dosage and temperature, while the impact of pH is insignificant. In order to determine the most suitable kinetic model, the compatibility of pseudo-first order, pseudo-second order and the intraparticle diffusion model was compared and the most suitable kinetic model was determined to be pseudo-second-order. Langmuir and Freundlich isotherms were assessed and the most suitable isotherm was observed to be Freundlich model.
AtıfScopus6WoS3OpenAlex6İncele - MakaleAçık Erişim2018Kademeli pompalama testleri ile kuyu performansının zaman içinde değişiminin incelenmesi
Türkkan, Gökçen Eryılmaz; Korkmaz, Serdar
Bu çalışmanın amacı, kademeli pompalama testi ile kuyu performansının yıllar içerisindekideğişimini incelemektir. Çalışmada Neojen Mühendislik tarafından Bursa Küçük Sanayi bölgesindekiserbest akiferde açılan 27 metre derinliğindeki kuyu kullanılmıştır. İlk olarak 2 Kasım 2012 tarihinde biradet kademeli pompalama testi yapılmıştır. Kademeli pompalama testi, aynı kuyuda 23 Mart 2017tarihinde tekrar yapılmıştır. Arazi çalışması sonucu elde edilen kademeli pompalama test verileriHantush-Bierschenk ve Rorabaugh analitik metotları ile çözülüp kuyu performans parametreleri eldeedilmiştir. İki testin uygulandığı tarih arasında kuyu verimindeki ve özgül kapasitedeki değişimincelenmiştir. Kuyu performansının artırılması için öneriler sunulmuştur
- MakaleYayıncıda açık erişim2018Scopus SJRQ2Optimization of Adsorption Parameters for Ultra-Fine Calcite Using a Box-Behnken Experimental Design
Uçurum, Metin; Özdemir, Akln; Teke, Çaǧatay; Serencam, Hüseyin; Ipek, Mümtaz
Removal of heavy metals from wastewater is a significant issue because it prevents environmental-based concerns and impacts a large number of diseases and disorders. Many low-cost natural materials have been offered recently as possible precursors to commercial synthetic adsorbents. Ultra-fine calcite, one of these natural materials, has been investigated as a potential commercial adsorbent. Response surface designs are effective experimental techniques to investigate the heavy metal adsorption capacity of ultra-fine calcite. In the present study, one such response surface design, Box-Behnken, is used in order to optimize adsorption factors, such as pH level, initial metal concentration, stirring rate and adsorption time, and to determine the heavy metal capacity of this adsorbent. Our results show that the proposed methodology is an effective approach to optimizing the adsorption process and to maximize the heavy metal capacity.
AtıfScopus9WoS7OpenAlex12İncele - MakaleYalnız künye2017Scopus SJRQ2Harvesting of microalgae via submerged membranes: Flux, fouling and its reversibility
Elcik, Harun; Cakmakci, Mehmet
The purpose of this study was to investigate membrane fouling caused by microalgal cells in submerged membrane systems consisting of polymeric and ceramic microfiltration membranes. In this study, one polymeric (flat-sheet, pore size: 0.2 μm) and two ceramic (flat-sheet, pore size: 0.2 μm and cylindrical, pore size: 1 μm) membranes were used. Physical cleaning was performed with water and air to determine the potential for reversible and irreversible membrane fouling. The study results showed that substantial irreversible membrane fouling (after four filtration cycles, irreversible fouling degree 27% (cleaning with water) and 38% (cleaning with air)) occurs in the polymeric membrane. In cleaning studies performed using water and air on ceramic membranes, it was observed that compressed air was more effective (recovery rate: 87-91%) for membrane cleaning. The harvesting performance of the membranes was examined through critical flux experiments. The critical flux values for polymeric membrane with a pore size of 0.20 μm and ceramic membranes with a pore size of 0.20 μm and 1 μm were ≤ 95 L/m2hour, ≤ 70 L/m2hour and ≤ 55 L/m2hour, respectively. It was determined that critical flux varies depending on the membrane material and the pore size. To obtain more information on membrane fouling caused by microalgal cells, the characterization of the fouled polymeric membrane was performed. This study concluded that ceramic membranes with a pore size of 0.2-1 μm in the submerged membrane system could be efficiently used for microalgae harvesting by cleaning the membrane with compressed air at regular intervals.
AtıfScopus9WoS7OpenAlex7İncele
