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Öğe A low-cost and eco-friendly biosorbent material for effective synthetic dye removal from aquatic environment: characterization, optimization, kinetic, isotherm and thermodynamic studies(Taylor & Francis Inc, 2020) Deniz, Fatih; Ersanli, Elif TezelA novel biosorbent was prepared by the surface modification of Zostera marina L. bioresidues and used for the removal of model synthetic dye, methylene blue from aqueous medium in this study. Taguchi design of experiment (DoE) methodology was employed to investigate the influence of significant operational parameters (reaction time, pH of medium and dye concentration) on the biosorption process and to develop a mathematical model for the estimation of biosorption potential of biosorbent. The percentage contribution of each of these process variables on the dye biosorption was found to be 9.03%, 1.95% and 88.84%, respectively. The dye biosorption capacity under the obtained optimum environmental conditions (reaction time of 120 min, pH of 8 and dye concentration of 15 mg L-1) was estimated to be 140.154 mg g(-1) (R-2: 99.83). This value was very close to the experimentally obtained dye removal performance value (140.299 mg g(-1)). These findings indicated the high ability of Taguchi DoE technique in the optimization and simulation of dye biosorption system. The kinetic and equilibrium modeling studies showed that the pseudo-second-order and Langmuir models were the best models for the elucidation of dye removal behavior of biosorbent. Besides, the performance of dye decontamination system was evaluated using the pseudo-second-order kinetic parameters. The thermodynamic analyses displayed that the dye biosorption was a feasible, spontaneous and exothermic process. For large scale dye purification applications, a single-stage batch biosorption system was also designed using the mathematical modeling data. All these results revealed that Z. marina L. bioresidues could be used as a promising alternative biosorbent material for the effective and eco-friendly dye biosorption systems.Öğe A natural macroalgae consortium for biosorption of copper from aqueous solution: Optimization, modeling and design studies(Taylor & Francis Inc, 2018) Deniz, Fatih; Ersanli, Elif TezelIn this study, the capacity of a natural macroalgae consortium consisting of Chaetomorpha sp., Polysiphonia sp., Ulva sp. and Cystoseira sp. species for the removal of copper ions from aqueous environment was investigated at different operating conditions, such as solution pH, copper ion concentration and contact time. These environmental parameters affecting the biosorption process were optimized on the basis of batch experiments. The experimentally obtained data for the biosorption of copper ions onto the macroalgae-based biosorbent were modeled using the isotherm models of Freundlich, Langmuir, Sips and Dubinin-Radushkevich and the kinetic models of pseudo-first-order, pseudo-second-order, Elovich and Weber and Morris. The pseudo-first-order and Sips equations were the most suitable models to describe the copper biosorption from aqueous solution. The thermodynamic data revealed the feasibility, spontaneity and physical nature of biosorption process. Based on the data of Sips isotherm model, the biosorption capacity of biosorbent for copper ions was calculated as 105.370 mg g(-1) under the optimum operating conditions. A single-stage batch biosorption system was developed to predict the real-scale-based copper removal performance of biosorbent. The results of this investigation showed the potential utility of macroalgae consortium for the biosorption of copper ions from aqueous medium.Öğe A novel biowaste-based biosorbent material for effective purification of methylene blue from water environment(Taylor & Francis Inc, 2022) Deniz, Fatih; Ersanli, Elif TezelThe biowaste left over from the fixed oil biorefinery process of Nigella sativa L. plant was used as a new biosorbent for the biosorption of synthetic dye of methylene blue from water environment in this study. The main variables of biosorption operation such as methylene blue concentration, time, pH, and biosorbent amount were optimized by the batch-type experiments. The characterization, kinetics, equilibrium, and thermodynamics works were conducted to show the nature of methylene blue biosorption. The studies of Fourier transform infrared spectroscopy and Scanning electron microscopy indicated that the biosorbent possessed an inhomogeneous surface morphology including many cavities and protuberances, and a rich functional group profile. The optimum values of operating variables studied for the biosorption of methylene blue were determined as methylene blue concentration of 15 mg L-1, time of 360 min, pH of 8, and biosorbent amount of 10 mg. The experimental data of methylene blue biosorption followed the kinetics and isotherm models of pseudo-second-order (R-2: 0.98, AdjR(2): 0.98, and RMSE: 8.97) and Dubinin-Radushkevich (R-2: 0.99, AdjR(2): 0.98, and RMSE: 6.84), respectively, based on the statistical tests of coefficient of determination (R-2), adjusted coefficient of determination (AdjR(2)), and root mean squared error (RMSE). The biosorption of methylene blue was a physical, spontaneous, and energetically favorable process (E-DR: 3.48 kJ mol(-1) and Delta G degrees: (-14.51) - (-10.02) kJ mol(-1)). This residual biological material from the fixed oil biorefinery process exhibited higher biosorption performance (187.46 mg g(-1)) than own unrefined (virgin) form and its modified, activated, and composite forms and many other sorbents reported in the literature. Hereby, the current work showed that this novel biowaste-based material could be used as an environmentally and economically promising biosorbent to effectively purify methylene blue from aquatic environment. NOVELTY STATEMENT Nigella sativa L. (black cumin) is a well-known annual medicinal and aromatic plant from the family of Ranunculaceae. Its seed part has a rich profile containing a wide variety of valuable compounds (fixed oil, carbohydrates, proteins, vitamins, pigments, essential oil, various bioactive substances, etc.), which are widely used in many fields such as cosmetics, food, medicine, and biofuel. After the refinery process to obtain these valuable compounds, a large amount of waste biomass remains. Considering the circular bioeconomy motion, a novel study was conducted on the use of biowaste left over from the fixed oil biorefinery process of N. sativa L. in the field of synthetic dye biosorption in the current work. The synthetic dye of methylene blue was used as a model to test the biosorption behavior of this novel biowaste-based biosorbent material. The main variables of biosorption operation such as synthetic dye concentration, time, pH, and biosorbent amount were optimized by the batch-type experiments. The characterization, kinetics, equilibrium, and thermodynamics studies were performed to show the nature of methylene blue biosorption operation. This residual biological material from the fixed oil biorefinery process exhibited higher biosorption performance than own unrefined (virgin) form and its modified, activated, and composite forms and many other sorbents reported in the literature. Hereby, the current work showed that this novel biowaste-based material could be used as an environmentally and economically promising biosorbent to effectively purify methylene blue from aquatic environment.Öğe An ecofriendly approach for bioremediation of contaminated water environment: Potential contribution of a coastal seaweed community to environmental improvement(Taylor & Francis Inc, 2018) Deniz, Fatih; Ersanli, Elif TezelHigh levels of heavy metals like copper ions in many industrial based effluents lead to serious environmental and health problems. Biosorption is a potential environmental biotechnology approach for biotreatment of aquatic sites polluted with heavy metal ions. Seaweeds have received great attention for their high bioremediation potential in recent years. However, the co-application of marine macroalgae for removal of heavy metals from wastewater is very limited. Thus, for the first time in literature, a coastal seaweed community composed of Chaetomorpha sp., Polysiphonia sp., Ulva sp. and Cystoseira sp. species was applied to remove copper ions from synthetic aqueous medium in this study. The biosorption experiments in batch mode were conducted to examine the effects of operating variables including pH, biosorbent amount, metal ion concentration and contact time on the biosorption process. The biosorption behavior of biosorbent was described by various equilibrium, kinetic and thermodynamic models. The biosorption of copper ions was strongly influenced by the operating parameters. The results indicated that the equilibrium data of biosorption were best modeled by Sips isotherm model. The values of mean free energy of biosorption computed from Dubinin-Radushkevich isotherm model and the standard Gibbs free energy change indicated a feasible, spontaneous and physical biotreatment system. The pseudo-second-order rate equation successfully defined the kinetic behavior of copper biosorption. The pore diffusion also played role in the control of biosorption process. The maximum copper uptake capacity of biosorbent was found to be greater than those of many other biosorbents. The obtained results revealed that this novel biosorbent could be a promising material for copper ion bioremediation implementations.Öğe An efficient biosorbent material for green remediation of contaminated water medium(Taylor & Francis Inc, 2024) Deniz, Fatih; Ersanli, Elif TezelThe discharge of large amounts of wastewater carrying various contaminants from many anthropogenic activities into the receiving water environment is a multidimensional issue negatively affecting the ecological system and natural balance in many ways. The removal of pollutants by the biologically-originated materials is an emerging area of interest due to profoundly their environmental friendliness, renewability, sustainability, readily availability, biodegradability, multiplicity, low (or no) economic cost, high affinity, capacity, and stability. In the present study, a popular ornamental plant, Pyracantha coccinea M. J. Roemer, was converted into a green sorbent material with the goal to effectively remove a widespread contaminant (synthetic dye, C. I. Basic Red 46) from synthetic wastewater. The physicochemical characteristics of the prepared biosorbent were determined by the instrumental analyses of FTIR and SEM. The batch experiments of various operational influence parameters were conducted to maximize the system efficiency. The wastewater remediation behavior by the material was investigated by the kinetics, thermodynamics, and isotherm experiments. The biosorbent had a non-uniform and rough surface architecture with a diversity of functional groups. The maximum remediation yield was achieved with the contact duration of 360 min, the pollutant load of 30 mg L-1, the pH of 8, and the biosorbent quantity of 10 mg (0.1 g L-1). The kinetics of the contaminant removal showed good agreement with the pseudo-second-order model. Thermodynamics study indicated that the treatment process was spontaneous and occurred by physisorption. Langmuir model fitted the isotherm data of the biosorption operation well and the maximum pollutant cleanup capacity of the material was determined to be 169.354 mg g(-1). These outcomes showed that P. coccinea M. J. Roemer could be used as a promising material for low-cost and green treatment of wastewater. NOVELTY STATEMENTIn the current study, Pyracantha coccinea M. J. Roemer was converted into a novel alternative sorbent material that is low-cost and green with the goal to effectively remove C. I. Basic Red 46, a widespread synthetic dye contaminant, from wastewater. The results indicated that P. coccinea M. J. Roemer could be used as an efficient biosorbent material for the green remediation of contaminated water medium.Öğe Application of a novel phyco-composite biosorbent for the biotreatment of aqueous medium polluted with manganese ions(Taylor & Francis Inc, 2018) Deniz, Fatih; Ersanli, Elif TezelA composite phyco-biomass including four different marine macroalgae species (Chaetomorpha sp., Polysiphonia sp., Ulva sp., and Cystoseira sp.) was evaluated as a novel biosorbent for the biosorption of manganese ions from aqueous solution. The experimental studies were performed to optimize the operational factors including solution pH, biosorbent amount, initial manganese concentration, and reaction time in a batch-mode biosorption system. The removal yield of the biosorbent for manganese ions increased with increasing pH, manganese ion concentration, and reaction time, while it decreased as the biosorbent dose increased. The obtained kinetic data indicated that the removal of manganese ions by the biosorbent was best described by the pseudo-second-order model and the pore diffusion also contributed to the biosorption process. The results of isotherm and thermodynamic studies showed that the Freundlich model represented the biosorption equilibrium data well and this biotreatment system was feasible, spontaneous, and physical. The maximum manganese uptake capacity of used biosorbent was found to be 55.874 mg g(-1). Finally, a single-stage batch manganese biosorption system was designed and its kinetic performance was evaluated. All these findings revealed that the prepared composite macroalgae biosorbent has a fairly good potential for the removal of manganese ions from the aqueous medium.Öğe Biomimicry: Journey to the Future with the Power of Nature(Umut SARAY, 2023) Ersanli, Elif Tezel; Ersanli, Cem CüneytBiomimicry involves studying and imitating nature's strategies and features in man-made design and technology. This approach fosters innovation in industrial, scientific, and design projects, drawing inspiration from the exceptional adaptations, processes, and structures of organisms. The primary goal of biomimicry is to comprehend the complexity and efficiency of natural ecosystems, leveraging this understanding to develop sustainable technologies and utilize natural resources more effectively. While humans have drawn inspiration from nature for thousands of years, the modern term gained popularity in the mid-20th century. Biomimicry is integral to sustainability, offering solutions in harmony with nature by integrating its balances into man-made systems. In medicine, biomimicry taps into the characteristics and processes of natural organisms to inspire innovative treatment methods and materials. In education, it equips students with the skills to comprehend and replicate nature responsibly, inspiring future designers and scientists. Ethical considerations emphasize that learning from nature should occur without causing harm to the natural environment. To unlock its full potential, biomimicry requires broader acceptance, integration into industrial applications, and technological advances for sustainable resource use. The energy sector, for instance, can benefit from biomimicry by enhancing the efficiency of solar panels through inspiration from photosynthesis, offering environmentally friendly energy production solutions. In essence, biomimicry is the key to discovering sustainable, innovative, and ethical solutions inspired by nature. As we delve into the richness of the natural world, this approach plays a pivotal role in shaping future technology and design. This review focuses on current biomimicry research, particularly highlighting its potential in the energy sector. The paper aims to serve as a blueprint for future achievements while shedding light on the unseen limitations of biomimicry.Öğe Distribution Dynamics of Vegetative Cells and Cyst of Ceratium hirundinella in Two Reservoirs, Turkey(2017) Ersanli, Elif Tezel; Mustak, Seda HasirciThe seasonal variation and vertical and horizontal distributions of Ceratium hirundinella (O.F.Müller) Dujardin and occurrence of its cyst form in Erfelek and Dodurga Reservoirs (Sinop, Turkey) were studied between August 2010 and July 2011. Our results showed that cyst form was observed with vegetative cells in phytoplankton. Ceratium hirundinella was recorded in high numbers in autumn/winter periods in these reservoirs. Winter conditions did not affect presence/absence of the species, but influenced the cell densities. Vegetative cells were observed mostly in lacustrine and transition zones, horizontally in two reservoirs and also cyst form was recorded in Erfelek Reservoir but not found in Dodurga Reservoir vertically. Dissolved oxygen had positive correlation with vegetative cells and also pH, conductivity and redox potential were important factors for vegetative cells and cyst occurrence.Öğe EPIZOOPHYTE COMPOSITION ON SPOTTED TURTLE EMYS ORBICULARIS (LINNAEUS, 1758) IN TURKEY(Bangladesh Botanical Soc, 2014) Ersanli, Elif Tezel; Gonulol, ArifA total of 59 species of epizoic algae were recorded from the carapace of Emys orbicularis (Linnaeus, 1758) (Testudinata, Emydidae). Division wise distribution of the recorded algae were Cyanophyta 26, Chlorophyta 13, Euglenophyta 5 and Chrysophyta 15. Among the recorded species Phormidium ambiguum, Pseudanabaena limnetica, Chroococcus spp. and Microcystis spp. were observed intensively.Öğe Karasu Çayı Alg Florası ve Su Kalitesi Üzerine Ekolojik ve İstatistik Bir Değerlendirme(2017) Ersanli, Elif Tezel; Öztürk, RidvanKarasu Çayı'nın (Sinop, Türkiye) alg florası, su kalitesinin ekolojik ve istatistiksel değerlendirmesi Nisan 2014 Mayıs 2013 tarihleri arasında çalışılmıştır. Cyanophyta, Bacillariophyta, Charophyta, Chlorophyta, Dinoflagellata ve Euglenozoa divizyolarına ait toplam 70 takson tespit edilmiştir. Bacillariophyta divizyosu hem tür sayısı hem de populasyon yoğunluğu bakımından baskın olmuştur. Daha sonra Chlorophyta divizyosu yaz ve sonbahar sonu ile kış başında fitoplanktonda önemli olmuştur. Bacillariophyta, pH ve nitrat ile, Chlorophyta iletkenlik ve silis ile, Cyanobacteria iletkenlik, organik madde ve nitrat ile, Charophyta sıcaklık ve pH ile, Euglenozoa toplam sertlik ile pozitif yönde korelasyona sahiptir. Sıcaklık ile pH ve organik madde arasında pozitif yönde kuvvetli korelasyon, çözünmüş oksijen ve organik madde arasında ise negatif yönde kuvvetli korelasyon tespit edilmiştir. Analiz sonuçlarına göre Karasu Çayı'nın suyu orta sert ve sert sular kategorisinde yer almakta olup, orta derecede kirli ve hafif alkalin karakterdedirÖğe Purification of malachite green as a model biocidal agent from aqueous system by using a natural widespread coastal biowaste (Zostera marina)(Taylor & Francis Inc, 2021) Deniz, Fatih; Ersanli, Elif TezelThe present paper aimed to perform an environmentally friendly and effective study on the purification of biocidal material using bioremediation technique, and in this context, a natural widespread coastal biowaste (Zostera marina) was applied to remove a model biocide from aqueous system. Herein, malachite green was selected as a common agent to evaluate the biosorption efficiency of waste biomaterial. The bioremediation properties of biosorbent were studied in a controlled batch experiment system by the optimization practice of operating parameters like biosorbent quantity, medium pH, time, pollutant concentration and temperature, and kinetic, thermodynamic, equilibrium, and characterization operations. The optimum operating conditions were considered as 10 mg, 4, 6 h, 15 mg L-1, and 25 degrees C, respectively. Elovich and Langmuir were found to be the best-fitted models, describing the experimental biosorption data. Thermodynamic study revealed a favorable nature of the cleanup process. The characterization analysis indicated the presence of various functional groups on the layered biosorbent surface involved on the pollutant treatment. The untreated biosorbent showed a good biocide purification performance with a value of 97.584 mg g(-1), and it could thus be employed as an eco-friendly and cost-effective cleaning agent in environmental bioremediation studies.Öğe Removal of colorant from simulated wastewater by phyco-composite material: Equilibrium, kinetic and mechanism studies in a lab-scale application(Elsevier, 2016) Deniz, Fatih; Ersanli, Elif TezelThe biosorption properties of a novel phyco-composite material composed of Spirogyra sp. and Rhizocionium sp. filamentous green algal biomasses for a model colorant (Basic Red 46, Br46) from simulated wastewater were first explored with respect to medium pH, biomaterial quantity, colorant concentration and contact time. The pseudo-second-order model represented the biosorption kinetic data well. Among biosorption isotherm models, Sips model provided the best fit to the equilibrium data. The phyco-composite biosorbent exhibited best performance at pH 9 with maximum biosorption capacity of 55.953 mg g(-1) for Br46. The mean free energy (E) from Dubinin-Radushkevich isotherm equation and the standard Gibbs free energy change (Delta G degrees) revealed a feasible, spontaneous and physical biosorption process. Thus, this novel composite material can be used as a promising biosorbent to remove such unsafe colorants from aqueous media. (C) 2016 Elsevier B.V. All rights reserved.Öğe Simultaneous bioremoval of two unsafe dyes from aqueous solution using a novel green composite biosorbent(Elsevier, 2016) Deniz, Fatih; Ersanli, Elif TezelSimultaneous bioremoval of Basic red 46 (Br46) and Basic violet 3 (Bv3) from binary mixture aqueous system onto novel green composite biosorbent made from a combination of Spirogyra sp. and Rhizoclonium sp. green filamentous algal biomasses was investigated in this study. The impacts of various influential parameters such as pH, biosorbent amount, dye concentration and contact time were evaluated using a batch biosorption method. Biosorption equilibrium experiments indicated that the best fit was achieved with Sips isotherm model. The maximum values of biosorption from binary component system were estimated to be 53303 and 37.734 mg g(-1) for Br46 and Bv3, respectively. Kinetic modeling studies showed that the co-biosorption process of dyes from dual solution was acceptably described by the pseudo-second-order model. All these findings proposed that the algal composite biosorbent could be used for simultaneously bioremediating an effluent polluted with such dyes. (C) 2016 Elsevier B.V. All rights reserved.Öğe The relationship between environmental variables and the vertical and horizontal assemblages of phytoplankton in Erfelek Reservoir in Sinop, Turkey(E Schweizerbartsche Verlagsbuchhandlung, 2013) Ersanli, Elif Tezel; Hasirci, SedaTemporal and spatial variation in phytoplankton community structure and the effects of physicochemical parameters on the vertical and horizontal distributions of phytoplankton were investigated between August 2010 and July 2011 in Erfelek Reservoir in Sinop which is used for irrigation and drinking water supply. A total of 73 taxa were identified belonging to Cyanophyta, Ochrophyta, Chlorophyta, Streptophyta, Dinoflagellata and Euglenozoa. The Ochrophyta was dominant in terms of both population density and number of species in the reservoir. The Ochrophyta division increased and the Chlorophyta division decreased from the surface to the bottom of the reservoir. Cyanophyta members preferred the surface and depths of 1 m and 4 m, but no important difference was observed for Euglenozoa and Dinophyta. Canonical Correspondence Analysis indicated that oxidation-reduction potential and nitrate were negatively correlated with temperature while the correlation between oxidation-reduction potential and nitrate were positive. In addition, temperature has an indirect effect on the distribution of species. Diversity index values show that the reservoir water was between the groups of partly polluted and unpolluted areas. Non-metric multi-dimensional scaling analyses showed that environmental variables followed the same seasonal changes at the surface and at depth.
