Yazarlar
- Yildirim, Numan(27)
- Tanyol, Mehtap(21)
- Topal, Murat(19)
- Kutlu, Banu(18)
- Yildirim, Nuran Cikcikoglu(17)
- Ince, Muharrem(16)
- Serdar, Osman(16)
- Erguven, Gokhan Onder(14)
- Öbek, Erdal(14)
- Danabas, Durali(13)
- Acar, Ramazan(11)
- Demir, Veysel(11)
- Arslan Topal, E. Işıl(8)
- Ogedey, Aysenur(8)
- Yonten, Vahap(8)
- Tatar, Sule(7)
- Ince, Olcay Kaplan(6)
- Aksu, Onder(5)
- Alp, Hevidar(5)
- Ates, Mehmet(5)
- Korkmaz, Volkan(5)
- Oguz, Ensar(5)
- Topal, E.Işıl Arslan(5)
- Ural, Mesut(5)
- Arslan, Zikri(4)
- Aslan, Naim(4)
- Can, Erkan(4)
- Demirbilek, Deniz(4)
- Goksu, Ali(4)
- Kocabaş, Mehmet(4)
- Korkmaz, Meral(4)
- Kurnaz Yetim, Nurdan(4)
- Lassabatere, Laurent(4)
- Mutlu, Ekrem(4)
- Yilmaz, Deniz(4)
- Akkurt, Nevzat(3)
- Angulo-Jaramillo, Rafael(3)
- Arslan Topal, E.I.(3)
- Aydın, Ayşe Nur(3)
- Camas, Mustafa(3)
Yayınlar
- MakaleAçık Erişim2022Scopus SJRQ2Determination of trace element and fatty acid levels in tissues of mirror and scaly carp (Cyprinus carpio L., 1758) living in Keban Dam Reservoir (Elazig)
Aydın, Sevinç; Akkoyun, H. Turan; Bayramoglu Akkoyun, Mahire; Bengu, Aydın Ş.; Ekin, Suat; Harlioğlu, Ayşe G.
This study investigated the concentrations of some accumulated trace metals (iron, manganese, zinc and copper) and fatty acids in liver and muscle tissues of mirror and scaly carp varieties (Cyprinus carpio L., 1758) living in Keban Dam Reservoir (Elazig), which is the second-largest artificial lake in Turkey that hosts commercially valuable and preferred fish varieties for human consumption. The inductively coupled plasma mass spectrometry (ICP-MS) method was used to analyse the concentrations of trace elements. Fatty acid levels were measured in a gas chromatography mass spectrometry (GC–MS) device, using a flame ionization detector (FID). Considering the two fish varieties and tissues that were studied, the mean metal concentrations (μg g−1) were found in the following ranges: Fe 12.32–49.97, Mn 0.12–0.62, Zn 10.45–86.59 and Cu 2.74–11.86. Although the lowest levels were detected in the muscle tissue for all the metals examined, the levels in the liver tissue were significantly higher. According to the results of the analyses on fatty acid concentrations, the mean total saturated fatty acid levels in the muscle tissue of the scaly carp and mirror carp varieties were found to be 31.07 and 31.43 (%), respectively, whereas these values for the liver tissue were consecutively 22.36 and 22.08 (%). Successively, the mean total levels of unsaturated fatty acids were determined as 68.93 and 68.40 (%) in the muscle tissue and 77.64 and 77.92 in the liver tissue. This study, with the finding that the trace (metallic) element accumulation rates were below the upper limits of the tolerable range, and the examined fish varieties were rich in fatty acids, shows that mirror carp and scaly carp living in Keban Dam Reservoir are highly nutritious for human diets.
AtıfScopus1OpenAlex2
İncele - MakaleAçık Erişim2022Scopus SJRQ1Three-term formulation to describe infiltration in water-repellent soils
Yilmaz, Deniz; Di Prima, Simone; Stewart, Ryan D.; Abou Najm, Majdi R.; Fernandez-Moret, David; Latorre, Borja; Lassabatere, Laurent
Modeling infiltration in water-repellent soils is difficult, as the underlying processes remain poorly quantified. However, recent work has adapted the Beerkan Soil Transfer Parameter (BEST) algorithm to include an exponential correction term for characterizing these types of soils. The original BEST-WR (WR = Water Repellent) method used a two-term approximate expansion of the Haverkamp quasi-exact implicit model. However, the BEST-WR method can have considerable inaccuracy, particularly as the time of infiltration and the soil water repellency increase. Here, we extended the BEST-WR model by adapting a three-term approximation of the Haverkamp quasi-exact implicit model to water-repellent soils. We then tested the new method using analytical data. For highly water-repellent soils, the proposed method had better performance when estimating soil sorptivity (S) and soil saturated conductivity (Ks), with respective errors of less than 1.5 % and 8 %, compared to relative errors of more than 10 % and 30 % with the two-term BEST-WR method. We also tested both approaches with experimental data. The two methods provided similar estimates for hydraulic parameters, with linear correlations between methods of R2 = 0.84 for S and R2 = 0.88 for Ks. Initial infiltration was not well modeled by either the two-term or three-term model for 33 tests, thus revealing limitations in the applied exponential model that we used to account for soil repellency. Nonetheless, the proposed three-term expression provided better fits than the two-term model for most of the infiltration runs, meaning that this new approach is more robust when modeling infiltration processes in water-repellent soils.
AtıfScopus16OpenAlex15İncele - MakaleAçık Erişim2022Scopus SJRQ1A green algae Cladophora fracta for accumulation of toxic/harmful pollutants causing environmental pollution in mine gallery waters
Topal, M.; Arslan Topal, E.I.; Öbek, E.
In the present study, the bioaccumulation of toxic/harmful pollutants (Fe, Pb, As, Cd, Cr, Ba, and Mn) by Cladophora fracta in mine gallery water was investigated. For this aim, the reactors planted with C. fracta were placed into mine gallery waters. Bioconcentration factor (BCF), metal pollution index (MPI), and accumulation capacity values were determined. According to the obtained results, the highest concentrations of Cr, Mn, Fe, Ba, Pb, Cd, and As were determined as 24.3 ± 1.2, 858 ± 27, 26,290 ± 87, 11.4 ± 0.6, 117.05 ± 5.8, 47.9 ± 1.4, and 2390.3 ± 11 mg/kg, respectively. BCF values were Fe > Pb > As > Cd > Cr > Ba > Mn. The MPI values of toxic/harmful pollutants according to days were determined as day 1 > 5 > 7 > 2 > 6 > 4 > 3, respectively. As a result, it was determined that C. fracta, which was placed in the mine gallery and exposed to the gallery waters, was effective in removing toxic/harmful pollutants. Therefore, C. fracta can be used as an alternative treatment material for the removal of toxic/harmful pollutants in mine gallery waters.
AtıfScopus4WoS3OpenAlex5İncele - MakaleYalnız künye2022Scopus SJRQ2Naphthol green B Removal using a Novel Hydrogel Composite: Thermodynamics, Isotherms, Kinetics and Optimization by RSM
Pıhtılı, Güzin; Tanyol, Mehtap; Birkan, Kubra
In this study, the efficiency of the Poly(4-vinylpyridine-co-acrylamide) doped with EuCl3 {(Poly(4-VP-co-AAM)/EuCl3)} hydrogel synthesized in the laboratory by free radical in-situ polymerization method in removing naphthol green B (NGB) from wastewater was investigated. The structural properties of the adsorbent have been described by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses. The dependence of NGB adsorption performance on varying such as the amount of adsorbent, initial NGB concentration and contact time were investigated in a batch system. To determine the interaction effects of the selected parameters on the adsorption process and to optimize the adsorption capacity of the process, the central composite design (CCD) in the response surface methodology (RSM) was used. Optimum conditions were found to be 110 mg/L NGB concentration, 0.05 g/100 mL Poly(4-VP-co-AAM)/EuCl3/EuCl3 dosage and 165.81 min contact time. The adsorption capacity and removal efficiency under these conditions were 206.46 mg/g and 92.50 %, respectively. Experimental equilibrium data were in better agreement with the Langmuir isotherm. The kinetic results indicated that the adsorption process can be defined by pseudo-second-order kinetic with internal diffusion as one of the rate-determining steps. The adsorption process was found to be exothermic and spontaneous. Experimental results showed that dye can be successfully removed from wastewaters using Poly(4-VP-co-AAM)/EuCl3 hydrogel as adsorbent.
AtıfScopus5WoS5OpenAlex6İncele - Derleme MakaleAçık Erişim2022Scopus SJRQ1Inverted Solar Stills: A Comprehensive Review of Designs, Mathematical Models, Performance, and Modern Combinations
Hussein, Ahmed Kadhim; Rashid, Farhan Lafta; Abed, Azher M.; Al-Khaleel, Mohammad; Togun, Hussein; Ali, Bagh; Akkurt, Nevzat; Malekshah, Emad Hasani; Biswal, Uddhaba; Al-Obaidi, Mudhar A.
Fresh water is scarce, making it a worldwide issue. In order to address global freshwater demand, a filtration technique is needed. Solar distillation (SD) that purifies brackish and sub-terranean water has been proven to be a promising green technology. It produces distilled water which can be used as potable water for drinking and other purposes. The designs, operations, and configurations of several inverted solar stills are thoroughly examined in this article. All techniques for solar water distillation to separate saltwater from freshwater have the same fundamental idea. It has been demonstrated that for a specified mass of water in the top basin, the daily output of an inverted absorber double-basin solar still (IASS) grows with increasing water depth in the bottom basin. Nevertheless, as the water depth in the bottom basin rises from 1 cm to 5 cm, the output of an inverted absorber double-basin solar system falls by about 27%. At water depths of 4, 6, and 8 cm, the daily yields from inverted absorber solar stills paired with a refrigeration cycle (RIASS) were 6.4, 10.08, and 9.5 L/day, respectively. The results also showed a substantial rise in water temperature in the inverted absorber solar still as a result of lower bottom heat loss and larger absorptivity. In this study, the emphasis on energy, efficiency, and environmental concerns remains with the modified multi-wick basin-type inverted absorber solar panel. The performance of the inverted trickling solar still was assessed with a 60 ppm average salinity under various sun radiation, feed water flow rate, and existence conditions for natural convection. It was found that the still could produce 2.55 L/day m2 of fresh water, a 15% increase. Brackish water with a salinity of 6000 ppm was used to test the still in November at tilt angles of 47◦ and 32◦ . Condensate production at the specified angles was 2.8 and 2 L/d, respectively. A total output of 6.907, 5.681, and 4.650 kg/m2 /day was also generated using the modified multi-wick basin-type inverted absorber solar still (MMWBIASS) at water depths of 1, 2, and 3 cm, respectively. With black cotton wicks, the MMWBIASS had a total thermal efficiency of 34.04%, 28.17%, and 23.61%.
AtıfScopus43OpenAlex47İncele - MakaleAçık Erişim2022Scopus SJRQ1Preparation of ε-Caprolactone/Fe3O4 Magnetic Nanocomposite and Its Application to the Remazol Brilliant Violet 5R Dye Adsorption from Wastewaters by Using RSM
Pekdemir, Mustafa Ersin; Tanyol, Mehtap; Torğut, Gülben
In this study, poly (ε-caprolactone)/Fe3O4 magnetic nanocomposite (PCL/Fe3O4 MNC) was synthesized by ring-opening polymerization. Then, PCL/Fe3O4 MNC was used as a novel adsorbent to remove remazol brilliant violet 5R (RBV 5R) from the aqueous media. The effects of PCL/Fe3O4 MNC dosage, process time, and initial RBV 5R concentration on the removal of RBV 5R were studied using the central composite design (CCD) method. The adsorption process was optimized using the response surface methodology, and the optimum conditions were defined. Optimum RBV 5R removal of 95.40% was obtained at a contact time of 167.98 min, PCL/Fe3O4 MNC dosage of 0.40 g, and RBV 5R concentration of 7.18 mg L−1. The process was also designed using the adsorption kinetic models and isotherm. The experimental data of RBV 5R adsorption on PCL/Fe3O4 MNC followed the Langmuir isotherm and pseudo-second-order kinetic models than the other models. Morphological and chemical properties of the adsorbent-adsorbate system indicated the high adsorption yield of RBV 5R on PCL/Fe3O4 MNC was achieved. The structural characteristics of the PCL/Fe3O4 MNC were analyzed by Fourier-transform infrared, attenuated total-reflectance (ATR), and X-ray diffraction. ATR tests showed that no significant change in chemical bond is found in PCL/Fe3O4 MNC before and after the adsorption process. The morphology of composites was investigated by scanning electron microscopy. A vibrating sample magnetometer (VSM) was used for the measurement of the magnetic property. Thermal analysis of MNC was studied using thermogravimetric analysis and differential scanning calorimetry instruments.
AtıfScopus6WoS5OpenAlex6İncele - MakaleAçık Erişim2021Removal of Chemical Oxygen Demand, Total Organic Carbon and Color from Textile Industry Wastewater by Using Phanerochaete chrysosporium (ME446)
Erguven, Gokhan Onder; Yildirim, Numan; Çelik, Aytekin
Wastewater discharge from textile industries concern environmental risks. Superiority of microbial methods over other high cost combined methods includes conversion of persistent organic materials to non-toxic last materials, sustainability, low cost, and comfortable. Textile wastewaters can have opposite effects on the quality of water in total organic carbon (TOC) and Chemical oxygen demand (COD). Agitation cultures can reach the surface area of the dyes, whereas a static cannot do. Biotreatment of textile wastewater from the dyeing process using white-rot fungus Phanerochaete chrysosporium (P.C) was investigated in agitated and static culture conditions. Dye is the major pollutant component in this wastewater includes some different organic pollutants. The treatment mediums containing distilled water in 1:10 ratio of wastewater were compared for treatment efficiency of P.C. Especially in agitated conditions at 27 oC and 150 rpm, it was achieved a successful treatment results. Under these conditions, a 48h long treatment reduced by 91,46 % of the original COD (from 1484 mg l-1) and by 94,92% the TOC (initial was 723.66 mg l-1). Moreover, treatment reduced color by 86,28 % from 3.550 A540 to 0.487 A540 at the end of the study. The decolorization properties of P.C obtained high performance and we determined P.C showed up to effective removal rate for COD and TOC within 48 hours. We suggest that these fungus pellets of P.C can reach the decolorization and can be a useful tool for bioremediation of textile dye wastewater within a short time period.
AtıfOpenAlex3
İncele - MakaleAçık Erişim2021The Effect of Gadolinium and Lanthanum on the Mortality ofDaphnia magna
Korkmaz, Volkan; Ergüven, Gökhan Önder; Yildirim, Numan; Cıkcıoğlu Yıldırım, Nuran
Rare earth elements (REEs) have been recently identified as emergent contaminants because of their numerous and increasingapplications in technology. The impact of REEs on downstream ecosystems, notably aquatic organisms, is of particular concern, but has to date been largely overlooked. The purpose of this study were to generate toxicological information regarding thesepoorly studied Gadolinium and Lanthanum elements to determine the current risk associated with these elements. The results of this work indicate notable D. magna mortality in high concentration of La and Gd. The highest mortality rate was determined as100% at 100 mg/L concentration for both La and Gd at the end of the 24hour . At the end of the 48 hours, the highest mortalityrate for both La and Gd was observed at 100 mg/L concentration. No mortality was determined at 48 hours at a concentration of10 mg/l Gd. 100% mortality was observed for two elements at 50 and 100 mg/L concentrations at 72 hours. in the natural living water no death was seen in this time period. The findings from our study also indicate that Gd is more toxic than La. Due to thismortality effect of La and Gd to D. magna, it will be important for the ensuring continuity of the ecosystem to monitor especiallyaquatic environments and to treat them with appropriate treatment methods from contaminated environments.
AtıfOpenAlex2İncele - MakaleAçık Erişim2021Gadolinyumun Tatlı Su Omurgasızı Dreissena polymorpha Üzerindeki Biyokimyasal Etkileri
Serdar, Osman; Yildirim, Nuran Cikcikoglu; Yildirim, Numan; Tatar, Sule
Bu çalışma, metabolik ve oksidatif stres biyobelirteçlerinin analizi yoluyla, su kirliliğinin iyi bir biyoindikatörü olarak kabul edilen tatlı su omurgasızı Dreissena polymorpha üzerindeki Gadolinyum (Gd) toksisitesini değerlendirmeyi amaçlamaktadır. Öncelikle çalışmamızda Gd’nin D. polymorpha üzerindeki LC50 değeri belirlenmiştir. D. polymorpha, kontrollü koşullar altında 24 ve 96 saatlik bir süre boyunca üç letal olmayan Gd konsantrasyonuna (1/20, 1/10 ve 1/5 LC50 değerine) maruz bırakılmıştır. TBARS ve CYP1A1 seviyeleri ELISA kiti kullanılarak belirlenmiştir. CYP1A1 ve TBARS düzeylerinin tüm gruplarda 24. ve 96. saatte kontrol grubuna göre arttığı görülmüştür. Bu sonuçlar, Gd'nin tatlı su omurgasızları, D. polymorpha için bir risk olarak kabul edilebileceğini ve bu nedenle alıcı ortamlara deşarjının denetlenmesi gerektiğini göstermektedir.
AtıfOpenAlex8TR Dizin4İncele - MakaleAçık Erişim2021Türkiye'de Kentsel Bir Atıksu Arıtma Tesisinde SARS-CoV-2 ve Gastrointestinal Patojenlerin Araştırılması
Topal, Murat; Topal, E.Işıl Arslan; Toraman, Zülal Aşçı; Süer, Ceren Sel; Öbek, Erdal
Bu çalışmada, Elazığ'da (Türkiye) bir kentsel atıksu arıtma tesisinde (AAT) SARS-CoV-2 ve gastrointestinal patojenler araştırılmıştır. Gastrointestinal patojen analizleri AAT giriş ve çıkış sularında, SARS-CoV-2 analizleri ise arıtma tesisinin farklı ünitelerinde yapılmıştır. Elde edilen analiz sonuçlarına göre AAT’nin girişinde gastrointestinal patojenler (bakteriyel, viral, EPA ve dışkı parazitleri) tespit edilmiştir. AAT'nin atıksularında enterohemorragik / verotoksin üreten Esherichia coli, gastroenterite neden olan tüm viral ajanlar (sapovirüsler (Sapo) hariç), insan parekovirüs (HPeV) ve EPA'dan adenovirüsler ve dışkı parazitlerinden Giardia lamblia tespit edilmiştir. AAT çıkışında gastroenterite neden olan bakteriyel ajanlar, viral ajanlar, EPA ve dışkı parazitleri incelendiğinde 7'de sadece 1, 6'da 4, 3'te 2 ve 3'te 1 ajan pozitif (+) olarak tespit edilmiştir. Atık su arıtma tesisinin her bir ünitesinden alınan numunelerde SARS-CoV-2 tespit edilememiştir. Sonuç olarak, araştırma bulgularına göre, atık su arıtma tesisi atık sularında patojenlerle karşılaşıldığından, çevre ve insan sağlığını korumak için arıtma tesislerinde dezenfeksiyon sistemine sahip olmak ve patojenleri ve SARS-CoV-2'yi sürekli izlemek gerekmektedir.
AtıfOpenAlex2TR Dizin1İncele - MakaleAçık Erişim2021The Relationship of the Hot and Mineral Springs in Munzur and Pülümür Valleys (Tunceli) with the Tectonic Structures of the Region and their Hydrogeochemical Properties
Sançar, Taylan; Önal, Ayten Öztüfekçi
The N-S flowing Munzur and Pülümür Rivers, which have the largest drainage areas in Tunceli Province, merge in the city center, and continue as a single river towards the south. In the southern area, there are smaller drainage areas such as Dinar and Rabat. In this study, the hydrogeochemical properties of the hot and mineral springs located in the mentioned drainage areas and the relationship of these springs with the faults in the region were investigated. The most important structural element controlling the reaching of hot and mineral springs to the surface is the primary and secondary deformation structures of the right lateral strike-slip Nazımiye Fault Zone. PermoCarboniferous aged impermeable schists form the basement rocks in the area hydrogeologically. Permian aged marble and crystallized limestones are the reservoir rocks of the hot and mineral waters which are outcropped in the drainage areas of Munzur and Pülümür Rivers. The presence of Eocene-Miocene aged semi-permeable flysch and permeable limestones cover rocks in this recharge area of the reservoir rocks indicates that the system is open. The pH and electrical conductivity of the hot and mineral waters in the system change between 5.96-6.80 and 2231-2930 μS/cm, respectively. Temperature of these waters varies between 35 to 20°C when they reach up to the surface. The total amount of dissolved solids ranges from 1300 to 1600 mg /L. The most abundant cation present in the waters is Ca+2; the most abundant anion is HCO3-. The Na-K-Mg geothermometer results of the hot and mineral waters correspond to the immature waters where the water-rock relationship is not an equilibrium. The pH and electrical conductivity of the cold waters are between 6.66 to 7.28 and 471 to 891 μS/cm, respectively. All waters examined here are of the Ca-Mg HCO3 type
AtıfOpenAlex3İncele - MakaleYalnız künye2021Scopus SJRQ1Investigation of Some Metal Accumulation Ability of Phragmites australis from Poultry Slaughterhouse Wastewaters
Topal, Murat
In this study, the bioaccumulation of some metals by Phragmites australis plants exposed to poultry slaughterhouse wastewater was investigated. For this aim, Mo, As, Cd, Se, Cu, Zn, Cr, Ba, Ti, Fe, Al, and Mn metals were determined in slaughterhouse wastewaters, P. australis plants, and sediment samples. The uptake of metals by P. australis was investigated. Also, BCF and TF values were calculated and compared with reference plant values. The maximum metal accumulation in P. australis plants exposed to poultry slaughterhouse wastewaters was 5900% for Al and 33.5% for Mn when compared with reference plant values. According to the BCF values, P. australis was bioaccumulative for Mo, Se, and Al. As a result, it was determined that P. australis plant can be used in the remediation of metals found in poultry slaughterhouse wastewaters and would be a good accumulator.
AtıfScopus2WoS1OpenAlex4İncele - MakaleYalnız künye2021Scopus SJRQ1Experimental design approach for ultra-fast nickel removal by novel bio-nanocomposite material
Ince, Olcay K.; Aydogdu, Burcu; Alp, Hevidar; Ince, Muharrem
In the present study, novel chitosan coated magnetic magnetite (Fe3O4) nanoparticles were successfully biosynthesized from mushroom, Agaricus campestris, extract. The obtained bio-nanocomposite material was used to investigate ultra-fast and highly efficient for removal of Ni2+ ions in a fixed-bed column. Chitosan was treated as polyelectrolyte complex with Fe3O4 nanoparticles and a Fungal Bio-Nanocomposite Material (FBNM) was derived. The FBNM was characterized by using X-Ray Diffractometer (XRD), Scanning Electron Microscopy-Energy Dispersive X-Ray Spectroscopy (SEM-EDS), Fourier Transform Infrared spectra (FTIR) and Thermogravimetric Analysis (TGA) techniques and under varied experimental conditions. The influence of some important operating conditions including pH, flow rate and initial Ni2+ concentration on the uptake of Ni2+ solution was also optimized using a synthetic water sample. A Central Composite Design (CCD) combined with Response Surface Modeling (RSM) was carried out to maximize Ni2+ removal using FBNM for adsorption process. A regression model was derived using CCD to predict the responses and analysis of variance (ANOVA) and lack of fit test was used to check model adequacy. It was observed that the quadratic model, which was controlled and proposed, was originated from experimental design data. The FBNM maximum adsorption capacity was determined as 59.8 mg g−1. Finally, developed method was applied to soft drinks to determine Ni2+ levels. Reusability of FBNM was tested, and the adsorption and desorption capacities were not affected after eight cycles. The paper suggests that the FBNM is a promising recyclable nanoadsorbent for the removal of Ni2+ from various soft drinks.
AtıfScopus11WoS11OpenAlex7İncele - MakaleYalnız künye2021Scopus SJRQ2The assessment of basic blue 41 textile dye decolorisation using the Fenton process: response surface methodology optimisation and toxicity evaluation
Tanyol, Mehtap; Cikcikoglu Yildirim, Nuran; Tatar, Sule; Serdar, Osman; Yildirim, Numan
The biochemical biomarkers (Catalase (CAT), glutathione s-transferase (GST), cytochrome P4501A1 (CYP1A1450) activities and glutathione (GSH), malondialdehyde (MDA) levels) of D. polymorpha exposed to the basic blue 41 (BB41) solutions for 24 and 96 h before and after the Fenton process (FTP) were evaluated to investigate the efficiency of the FTP. The optimum conditions for the removal of BB41 were set using central composite design (CCD), which is a response surface methodology (RSM) module in the Design-Expert® software. The optimal conditions were found to be 27.87 min, 3.49 mg/L, and 0.04 for reaction time, initial BB41 concentration, and Fe2+/H2O2 molar ratio, respectively, resulting in maximum (99%) removal efficiency. After FTP, the MDA and GSH levels decreased significantly during the 24 and 96 h. CAT activities were increased after treatment. No statistically significant changes were observed in the CYP1A1 levels after FTP. GST activities decreased during 24 h but increased during 96 h after FTP. CYP1A1450, catalase, GST activities and MDA, GSH levels of D. polymorpha are useful biomarkers to evaluate the efficiency of FTP. This study suggests that BB41 dye must be further treated after the FTP to minimise the ecotoxicological risk.
AtıfScopus8WoS6OpenAlex8İncele - MakaleYalnız künye2021Scopus SJRQ1Evaluation of the efficiency of chlorpyrifos-ethyl remediation by Methylobacterium radiotolerans and Microbacterium arthrosphaerae using response of some biochemical biomarkers
Onder Erguven, Gokhan; Tatar, Şule; Serdar, Osman; Yildirim, Nuran Cikcikoglu
This study reveals out detoxifying and antioxidant enzyme response of Gammarus pulex exposed/polluted to chlorpyrifos-ethyl insecticide before and after biodegradation/bioremediation by Methylobacterium radiotolerans and Microbacterium arthrosphaerae. Cytochrome P450 1A1, glutathione S-transferase, catalase, and superoxide dismutase activities in G. pulex exposed to chlorpyrifos-ethyl before and after bioremediation/biodegradation by these two bacteria during 24 and 96 h tested by using commercial ELISA kits. The activity of catalase enzyme was decreased depending on chlorpyrifos-ethyl before and after bioremediation/biodegradation the enzyme activity was increased repeatedly. Superoxide dismutase activity level increased after chlorpyrifos-ethyl exposure in 96 h (p > 0.05). Following bioremediation, superoxide dismutase enzyme activity decreased again during 24 h (p > 0.05) and increased during 96 h (p < 0.05). Statistical differences were not found in cytochrome P450 1A1 enzyme activity before and after the process (p > 0.05). No significant differences were determined during the activity of glutathione S-transferase in 24 h (p > 0.05). The activities of glutathione S-transferase were increased after exposure of chlorpyrifos-ethyl during 96 h. After bioremediation; the activity of glutathione S-transferase increased even more (p < 0.05). The results determined that activities of G. pulex at superoxide dismutase, catalase, and glutathione S-transferase are common biomarkers for revealing out the efficiency of bioremediation of chlorpyrifos-ethyl with these two types of soil bacteria. [Figure not available: see fulltext.]
AtıfScopus15WoS14OpenAlex16İncele - MakaleYalnız künye2021Scopus SJRQ4Balneotherapy Features of Natural Thermal Source from Pertek (Turkey-Tunceli) Due to Its Some Chemical, Radioactivity and Biological Parameters
Sönmez, Pinar Erecevit
It can also be defined as a discipline that reviews the factors of balneology or hydrotherapy, which are alternative treatment methods for public health, from chemical, biological and medical aspects. In this study, it was aimed to investigate whether the underground waters in the Pertek district of Tunceli province are suitable for balneology. Chemical, radioactivity analysis, microbiological quality, antimicrobial activities were determined in relation to natural groundwater and its ability to be a natural healing source was investigated. When the chemical content is examined, it was determined to be bromide amount is 0.24 mg / L, Iodine (I); 1.9 mg / L, sulfur (S); 0.02 mg / L, boron (B): 2676 µg / L, silicium (Si); 1.9 mg / L. With respect to the results, thermal water has the feature to be used in balneolotherapy. According to the results of the radioactivity analysis, alpha (α) is 0.15 Bq / L; Beta (β) is <0.30 Bq / L and radon (Rn) is <13.4 Bq / L tritium (T) content is <10 Bq / L (<83.33 TB) and it is included in both mineral and young water group. This ground water and they comply with the standards in terms of microbiology (Total bacteria, coliform, Escherichia coli). Its antibacterial, antifungal and antidermatophyte properties prove to be a healing source. We confirmed the effectiveness of this healing water to both protect and promote human health as a drinking cure and reach the newest and most effective treatment modalities by using related water in Health and Thermal Tourism.
- MakaleAçık Erişim2021Scopus SJRQ1Highly Efficient Defluoridation of Water through Reusable poly(aniline-co-o-aminophenol) Copolymer Modified Electrode Using Electrochemical Quartz Crystal Microbalance
Unal, Asuman; Hillman, A. Robert; Ryder, Karl S.; Cihangir, Salih
Although the World Health Organization (WHO) recommends a limit of 1.5 mg l-1 fluoride ions in drinking water, this is not satisfied in many parts of the world. When this limit is exceeded, the electrochemically switched ion-exchange (ESIX) technique (mainly based on conductive polymers) has been identified as a promising method for removing the excess fluoride ions. The present study aimed to develop an efficient method based on the ESIX technique by using poly(aniline-co-o-aminophenol) copolymer to extract fluoride ions. Electrochemical quartz crystal microbalance (EQCM) and acoustic admittance data were utilized to assay the synthetic efficiency of copolymer deposition, and to evaluate the dependence of the defluoridation process on the proportions of the monomers in the copolymer matrix and on film thickness. The resulting films were characterised by Fourier transform infrared spectroscopy (FTIR) and scanning electrochemical microscopy (SEM) techniques. For optimized co-monomer ratio in the feedstock, poly(aniline-co-o-aminophenol) at an applied potential of 0.30 V showed excellent performance for fluoride removal from water at pH 6.6, to the extent of 20 (mg F-) (g polymer)-1. Comparison of the performance of ESIX using poly(aniline-co-o-aminophenol) with that of other techniques and materials reveal that it has significant potential for water defluoridation.
AtıfScopus9WoS8OpenAlex10İncele - MakaleAçık Erişim2021Scopus SJRQ3A novel macrofungus for the biosorption of hazardous dye and its reuse potential: Experimental design approach using response surface methodology
Ince, Olcay Kaplan; Alp, Hevidar; Ince, Muharrem; Onal, Ali
In the present study, a novel biosorbent, namely Agaricus campestris, was used for the removal of Methylene Blue (MB) from an aqueous medium. The biosorbent was characterized using fourier-transform infrared spectrometer spectra, scanning electron microscopy-energy dispersive X-ray, and thermogravimetric analysis. The influence of important process parameters including pH (4–7), temperature (25°C–35°C), contact time (15–25 min), and biosorbent amount (40–80 mg) on the uptake of MB solution were also optimized, which significantly affected the removal efficiency of MB. A central composite design (CCD) combined with response surface modeling (RSM) was carried out to maximize MB removal by A. campestris for the adsorption process. A regression model was derived using RSM to predict the responses and analysis of variance (ANOVA), and to check model adequacy lack of fit test was used. The A. campestris adsorption capacity was determined as 24.2 mg g–1. The ANOVA showed a high coefficient of determination (R2 = 0.9987). This study clearly revealed that RSM was one of the most effective and appropriate method for the optimization of operating conditions. The possibility of reusing A. campestris was also investigated and, as a result, it was found quite possible and showed high performance in the recovery of MB.
AtıfScopus2WoS1OpenAlex2İncele - MakaleAçık Erişim2021Scopus SJRQ3Analysis of heavy metal contamination in surface sediments of Iskenderun Bay, Turkey
Kutlu, Banu; Özcan, Tahir; Özcan, Gülnaz
The ecological risk resulting from the accumulation of some heavy metals in the sediments of Iskenderun Bay was assessed using the following measures: enrichment and contamination factor, pollution load index (PLI), and potential ecological risk index (RI). The concentrations of the studied heavy metals were in the following order: Fe > Ni > Mn > Cr > Zn > Cu > As > Pb > Cd > Hg. Ni and As had the highest EF values. This situation is most likely due to the presence of iron, pesticide, and fertilizer plants in the region. According to the United States Environmental Protection Agency, Ni, As, Mn, and Cr may have harmful effects on faunal communities in sediments. According to the RI, Site 4 was more contaminated and toxic than the other seven study sites, with "moderate"ecological risk. Pearson's correlation coefficient was determined by multivariate methods - cluster and principal component analysis. As can be inferred from the RI values, the potential toxic effect of As and Ni in the sediments is moderate.
AtıfScopus7OpenAlex6İncele - MakaleYalnız künye2021Multivariate statistical evaluation of dissolved trace elements and water quality assessment in the Karaca dam, Turkey
Kutlu, Banu; Mutlu, Ekrem
This study was performed from January 2017 to December 2017 with taking samples every month from four stations to determine the water quality of Ka-raca Dam, located in Sinop. The guidelines of the World Health Organization for water quality index (WQI) and Turkey’s Ministry of Forestry and Water Affairs specifications for Surface Water Quality Regulations (SWQR) were used in the determination of water quality and 28 variables were analyzed. The quality of the irrigation water was also calculated. This objective, the sodium adsorption ratio (SAR), sodium percentage, permeability index (PI), and mag-nesium index were calculated. The average WQI value of the lake was found to be 19.23. It was observed that the water quality parameters did not exceed the restrictions in any stations during the period. According to the results of the research, Karaca Dam is in a good class in terms of drinking water quality and irrigation water. The health risk evaluation, using the hazard ratio and index (HI), was carried out as suggested by USEPA, and it was found that the water of Karaca Dam is not harmful to human health in terms of Pb, Cd, and Hg.
AtıfScopus7WoS7OpenAlex9İncele
