Yazar "Türk, Feride N." seçeneğine göre listele

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    Characterization of Sugar Beet Pulp Modified with Phosphoric Acid and its Use in Removal of Colored Matters and Cations from Thin Sugar Juice
    (Springer, 2023) Türk, Feride N.; Arslanoğlu, Hasan; Tümen, Fikret
    In this study, it has been determined that the cation removal capacity of the modified sugar beet pulp obtained by saponification with sodium hydroxide and esterification with phosphoric acid increased, and it provides significant color lightening and cation removal when contacted with thin sugar juice under suitable conditions. Although both the acidic and neutralized forms of this material show similar activities, the use of the neutralized form reduces the risk of inverting the sugar in the thin sugar juice. Sugar beet pulp was modified, and some properties were determined. Sugar beet pulp become more stable when modified with phosphoric acid. To reduce the amount of molasses, it is appropriate to use the material in an acid form together with an anion exchanger. It has advantages, such as the modification of sugar beet pulp with phosphoric acid can be done in sugar factories.
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    Integrated waste reduction by production of bio-magnetic adsorbents via copyrolysis of waste red mud and residual sugar beet pulp: Target zero waste
    (Academic Press Ltd- Elsevier Science Ltd, 2025) Sağlam, Semanur; Türk, Feride N.; Arslanoğlu, Hasan
    Red mud, a waste of the aluminum plant, is the result of calcination of bauxite ore with sodium hydroxide at high temperature and concentration. This waste, which is the fearful dream of alumina production factories, attracts attention with its rich iron content. In this study, magnetic activated carbon (MAC) was obtained from the co- pyrolysis of sugar beet pulp and red sludge. The removal of basic yellow basic yellow 5 GL (BY5GL) dyestuff from aqueous solutions was investigated with the obtained MAC. MAC was characterized by X-ray diffraction, FTIR, SEM-EDX, DSC, VSM and BET surface area. VSM analysis revealed a magnetism of 46.11 emu/g. RSM Taguchi statistical analysis was utilized. According to the L16 orthogonal array consisting of 4 factors and 4 levels, the optimum MAC was obtained at 800 degrees C, 120 min, 5 impregnation and 0.5 biomass/K2CO3 ratio. Langmuir, Freundlich and Dubinin-Radushkevich (D-R) isotherm equations were applied. Pseudo-first, pseudo- second and intra-particle diffusion kinetic models were analyzed. Langmuir adsorption isotherm and pseudo- second kinetic model gave the best results. It was observed that pH was the most effective parameter for BY5GL adsorption. The maximum adsorption capacity was found to be 175.4 mg.g-1 at pH 7, 20 degrees C, 360 min contact time, 5 g.L-1 adsorbent dosage and 50 mg.L-1 dyestuff concentration. Activation energy and thermodynamic parameters of the adsorbent were also investigated for dyestuff adsorption.
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    Investigation of Leaching Conditions and Leaching Kinetics of Oxidized Copper Ore Malachite at Atmospheric Pressure Using Tartaric Acid Solution
    (Springer India, 2024) Türk, Feride N.; Arslanoğlu, Hasan
    In this study, the dissolution conditions and dissolution kinetics of copper from malachite in the presence of organic acid (C4H6O6) as an organic leaching reagent were examined. The effects of particle size, acid concentration, time, solid/liquid ratio, temperature, and mixing speed on the dissolution process of copper were investigated. According to the test results, optimum dissolution conditions are as follows: particle size was 74 µm; organic acid concentration was 0.2 mol/L; duration was 60 min; solid/liquid ratio was 1/10; the temperature was determined as 25 °C and the stirring speed was 300 rpm; and the copper extraction value was obtained as 73.18% under optimum experimental conditions. Kinetic models were applied to the dissolution efficiencies obtained to determine the dissolution kinetics of copper in the presence of organic acid, and it was found that the dissolution process was controlled by the film diffusion model. In light of the data obtained, it can be said that organic acid, which is an economical and environmentally friendly leaching reagent, can be used in the dissolution of copper from malachite (Cu(OH)2CuCO3), as well as in the leaching of other precious metals such as copper, zinc, and cobalt from oxide and carbonate ores.
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    Obtaining, Characterizing, and Evaluation of Potassium-Struvite (KMgPO4.6H2O) in Phosphorus Removal from Water: Investigation of Low-Cost Mgo Use
    (Springernature, 2024) Türk, Feride N.; Eren, Muhammet Şakir Abdullah; Arslanoğlu, Hasan
    In this study, the possibilities of using MgO, which is an inexpensive magnesium source, in the production of the MgKPO4.xH(2)O compound called potassium-struvite were investigated. For this purpose, the effects of parameters such as Mg:K:PO4 ratio, initial pH of the environment, and time were investigated for the use of MgO in the production of potassium-struvite, by systematic experiments made out of MgO suspensions and KH2PO4 solutions. The Mg/K/P = 1/1/1 ratio was found to be appropriate from the findings obtained in the experiments. It has also been determined that a slightly alkaline environment is required for favorable precipitation. In addition, it was concluded that the aqueous medium should not be too dense, since MgO, which has low soluble properties, reacts easily. It was determined that more than 70% of the potassium ions in the environment precipitated after a short time under these conditions. It was determined that phosphate precipitated at a higher rate than potassium in a suspension containing the same mole number of MgO from a 0.25 M KH2PO4 solution. This gave the impression that a magnesium phosphate compound other than struvite also precipitated. As a result, it can be stated that magnesium oxide, which is a cheap source of magnesium, is a suitable material to be used in the production of potassium-struvite.
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    Recovery of Potassium from Pyrolysis Product of Sugar Fabrication Waste Carbonation Cake and Vinasse Mixture and Production of Adsorbent for Wastewater Treatment
    (Springer India, 2024) Türk, Feride N.; Arslanoğlu, Hasan
    In this study, percolation tests with water were carried out on the products that were subjected to pyrolysis and obtained in order to carbonize the organics in the vinasse carbonation cake mixtures. For this purpose, the mixtures prepared from the concentrated vinasse supplied from Sugar Factory and the carbonation cake supplied from Sugar Factory were heated at 500 degrees C for 4 h, and the extractability and dissolution rate of potassium into water were determined by leaking water over the products. The ability of the residue to remove methylene blue from the aquatic environment was determined. It should be emphasized that the solid residue from the potassium extraction has a considerable amount (289-370 mg/g) and a basic dye removal capacity greater than that of the raw carbonation cake (208 mg/g). COD value in the extract of the pyrolysis product with a cake/vinasse ratio of 0.5 was determined as 970 mg/l with a significant increase. The methylene blue removal capacity of the extraction residue samples obtained in this group of experiments decreases as the dry cake-vinasse ratio increases. It should be emphasized that the composite product obtained by taking advantage of these results can be actively used in the production of compound fertilizer.
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    Releases of metal bound modified sugar beet pulp (Me2+MSBP) using various aqueous solutions: its use as slow release fertilizer
    (Springer Heidelberg, 2023) Türk, Feride N.; Arslanoğlu, Hasan
    The development of fertilizer technology is directed towards the production and application of slow or controlled fertilizers. In order to prevent these losses and difficulties, slow and controlled release fertilizers can be produced. Slow or controlled release fertilizers are fertilizers that can be in organic or inorganic form, in solid or liquid form, release the nutrients they contain more slowly than conventional fertilizers, depending on water dissolution, microbial decomposition, growing environment conditions, and thus provide a longer lasting effect. Thus, it is possible to provide the plant with the necessary plant nutrients during the growth period. In this study, three different elements were bound to sugar beet pulp modified with citric acid and their dissolution tendencies were investigated in different environments from the material to which the elements were attached. The dissolution trends were chosen to reflect the natural medium as best as possible. The best dissolution tendencies for all 3 elements were realized in percolations made with EDTA solutions. After the EDTA solution, the dissolution tendencies obtained in the study are followed by citric acid solution, humic acid solution, buffer solution, tap water, and pure water, respectively. The media that best represent the soil solution are tap water, humic acid, and citric acid solutions. Therefore, these two environments are of great importance for the study. It was determined that the modified sugar beet pulp binds these metal ions at the rate of 108.2, 87.1, and 45.7 mg/g, respectively, by contacting with Cu2+, Zn2+, and Mn2+ solutions for 24 h. The dissolution tendencies of this metal-bound bonded material in different environments were investigated. After the EDTA solution, the dissolution tendencies obtained in the study are followed by citric acid solution, humic acid solution, buffer solution, tap water, and pure water, respectively. The media that best represent the soil solution are tap water, humic acid, and citric acid solutions. Therefore, these two environments are of great importance for the study. In the light of these results, it has been shown that modified sugar beet pulp with copper, zinc, and manganese binding can be used effectively as a slow dissolving micronutrient fertilizer in soils with trace element deficiency.
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    Removal of Basic Yellow 51 Dye by Using Ion Exchange Resin Obtained by Modification of Byproduct Sugar Beet Pulp
    (Springer India, 2023) Türk, Feride N.; Çiftçi, Harun; Arslanoğlu, Hasan
    The removal of dyestuffs, which are an important pollutant group in textile wastewater, is an important environmental problem. Various chemical and physicochemical methods are used in the purification of these wastewaters. Recently, it is known that a wide variety of agricultural materials and their modified products have been investigated for dye removal using the adsorption process, which is a promising removal method. In this study, the removal of Basic Yellow 51 dyestuff from aqueous solutions of sugar beet pulp, first activated by saponification with NaOH solution and then modified by heating with citric acid, was investigated. For this purpose, the effects of parameters such as solution pH, sorbent dose, initial concentration, contact time and temperature on the sorption of Basic Yellow 51 dye to modified sugar beet pulp were investigated. As a result, it was found that the functional groups of pectin and cellulose substances in sugar beet pulp, which are effective in sorption, were activated and their number increased, thereby increasing the dye removal efficiency. It was found that sorption efficiency increased with increasing contact time and temperature and decreased with increasing initial concentration. It was determined that the sorption equilibrium data fit the Langmuir isotherm better and that the sorption process was endothermic and spontaneous. The q(e) value was obtained from the Langmuir isotherm as approximately 200 mg/g. As a final result, it has been demonstrated that the modified product of sugar beet pulp can be used effectively in removing basic dyes from the aquatic environment.
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    Synthesis of high porous carbon from grape marc-vinasse mixture: investigation on tetracycline and ciprofloxacin removal performance and adsorption mechanisms
    (Springer Heidelberg, 2024) Onat, Buket; Türk, Feride N.; Arslanoğlu, Hasan
    In this study, adsorption, a promising technique due to its simplicity and high efficiency, was used to remove tetracycline and ciprofloxacin from water. One-step activated carbon production from lignocellulosic waste uses an environmentally friendly, effective, economical, and sustainable adsorbent. The study aimed to remove TC and CP from an aqueous solution. The effect of parameters such as pH (3-11), biosorbent dose (0.25-5 g/L), initial antibiotic concentration (10-150 mg/L), and contact time (5-240 min) on adsorption was investigated. It was observed that the adsorption process was relatively fast, and equilibrium was reached within 120 and 90 min for tetracycline and ciprofloxacin, respectively. Furthermore, it showed the best correlation with the Langmuir isotherm model. The theoretical capacities of crude activated carbon waste to adsorb tetracycline and ciprofloxacin were determined as 29.16 and 46.37 mg/g, respectively. The experimental results obtained in this study indicate that this agricultural waste can be used as an environmentally friendly and cost-effective adsorbent to remove some classes of antibiotics from aqueous solutions, thus contributing to the solution of the problem of the uncontrolled presence of these drugs in wastewater.
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    Synthesis of magnetic activated carbon from industrial waste: characterization, tetracycline removal and interpretation of its mechanism
    (Springer Science and Business Media Deutschland GmbH, 2024) Sağlam, Semanur; Arslanoğlu, Hasan; Türk, Feride N.
    Tetracycline is the second most widely used antibiotic, and its presence in wastewater is increasing with the increasing use of TC, which is of global concern. For the removal of TC from wastewater, magnetic activated carbon (MAC) was produced from activated carbon obtained using potassium-rich wine stones in previous studies. In this study, MAC synthesis was carried out in order to obtain a cost-effective, environmentally friendly, and high-quality adsorbent for TC adsorption using the activated carbon (AC) obtained in the previous study. In the production process of MAC, chemical precipitation and hydrothermal methods were used together. To produce MAC, FeCl2.4H2O and FeCl3.6H2O solutions were mixed with AC in a 1/2 w/w ratio. Tetracycline (TC) adsorption of both MAC and AC investigated the physicochemical properties with the help of analyses such as BET, SEM, EDX, FTIR, VSM, and pH at point eo charge (pHZPC). Pseudo-first-order model and pseudo-second-order model kinetic models and Langmui, Freundlich, Temkin, and Dubinin–Radushkevich kinetic isotherms were investigated for TC adsorption of MAC and AC. With an R 2 value of 0.9895, it was concluded that the Langmuir isotherm is the most suitable adsorption, which indicates that the adsorption is monolayer; 3 desorption studies were performed for both TC and MAC. It was observed that MAC had better desorption capacity in the results obtained. According to the results obtained, MAC was tested to show higher TC adsorption, although it has a lower surface area than AC, which is 1086.45 m2/g and 1814.16 m2/g, respectively. However, the average pore diameter of MAC was 4.009 nm, while that of AC was 2.2483 nm. The reason for this is thought to be that magnetite clogs the pores on the surface of the AC, reducing the surface area but increasing the active sites, resulting in better adsorption. These results indicate that the obtained MAC is an environmentally friendly and cost-effective magnetic adsorbent for TC removal.
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    Synthesis of zeolite from industrial wastes: a review on characterization and heavy metal and dye removal
    (Springer, 2024) Eren, Sena; Türk, Feride N.; Arslanoğlu, Hasan
    Increasing world population, urbanization, and industrialization have led to an increase in demand in production and consumption, resulting in an increase in industrial solid wastes and pollutant levels in water. These two main consequences have become global problems. The high Si and Al content of solid wastes suggests that they can be used as raw materials for the synthesis of zeolites. In this context, when the literature studies conducted to obtain synthetic zeolites are evaluated, it is seen that hydrothermal synthesis method is generally used. In order to improve the performance of the hydrothermal synthesis method in terms of energy cost, synthesis time, and even product quality, additional methods such as alkaline fusion, ultrasonic effect, and microwave support have been developed. The zeolites synthesized by different techniques exhibit superior properties such as high surface area and well-defined pore sizes, thermal stability, high cation exchange capacity, high regeneration ability, and catalytic activity. Due to these specific properties, zeolites are recognized as one of the most effective methods for the removal of pollutants. The toxic properties of heavy metals and dyes in water and their carcinogenic effects in long-term exposure pose a serious risk to living organisms. Therefore, they should be treated at specified levels before discharge to the environment. In this review study, processes including different methods developed for the production of zeolites from industrial solid wastes were evaluated. Studies using synthetic zeolites for the removal of high levels of health and environmental risks such as heavy metals and dyes are reviewed. In addition, EPMA, SEM, EDX, FTIR, BET, AFM, and 29Si and 27Al NMR techniques, which are characterization methods of synthetic zeolites, are presented and the cation exchange capacity, thermodynamics of adsorption, effect of temperature, and pH are investigated. It is expected that energy consumption can be reduced by large-scale applications of alternative techniques developed for zeolite synthesis and their introduction into the industry. It is envisaged that zeolites synthesized by utilizing wastes will be effective in obtaining a green technology. The use of synthesized zeolites in a wide variety of applications, especially in environmental problems, holds great promise. Graphical Abstract: (Figure presented.) © The Author(s) 2024.
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    Tetracycline (TC) removal from wastewater with activated carbon (AC) obtained from waste grape marc: activated carbon characterization and adsorption mechanism
    (Springer, 2024) Sağlam, Semanur; Türk, Feride N.; Arslanoğlu, Hasan
    In this study, activated carbons were obtained from grape marc for tetracycline removal from wastewater. Activated carbons were obtained by subjecting them to pyrolysis at 300, 500, and 700 °C, respectively, and the effect of pyrolysis temperature on activated carbons was investigated. The physicochemical and surface properties of the activated carbons were evaluated by SEM, FTIR, XRD, elemental analysis, N2 adsorption/desorption isothermal, thermal gravimetric (TG) and derivative thermogravimetric (DTG), and BET surface area analysis. When the BET surface areas were examined, it was found that 4.25 m2/g for activated carbon was produced at 300 °C, 44.23 m2/g for activated carbon obtained at 500 °C and 44.23 m2/g at 700 °C, which showed that the BET surface areas increased with increasing pyrolysis temperatures. The pore volumes of the synthesized activated carbons were 0.0037 cm3/g, 0.023 cm3/g, and 0.305 cm3/g for pyrolysis temperatures of 300, 500, and 700 °C, respectively, while the average pore size was found to be 8.02 nm, 9.45 nm, and 10.29 nm, respectively. A better adsorption capacity was observed due to the decrease in oxygen-rich functional groups with increasing pyrolysis temperature. It was observed that the activated carbon obtained from grape skins can easily treat hazardous wastewater containing tetracycline due to its high carbon content and surface functional groups. It was also shown that the activated carbon synthesized in this study has a higher pore volume despite its low surface area compared to the studies in the literature. Thanks to the high pore volume and surface active groups, a successful tetracycline removal was achieved.
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    Use and applications of metal-organic frameworks (MOF) in dye adsorption: Review
    (Elsevier Sci Ltd, 2023) Sağlam, Semanur; Türk, Feride N.; Arslanoğlu, Hasan
    Dyed wastewater has a serious impact on living organisms. It must be treated to a certain level before being released into the environment. Dyed wastewater is non-biodegradable, toxic and has been found to have carcinogenic effects in long-term exposure. Therefore, the treatment of dyed wastewater has become a global concern. In this context, researchers have proposed metal organic frameworks (MOFs) as the most effective method for dye wastewater removal. Because MOFs show high adsorption capacity in dye removal with adjustable pore diameter and surface morphology compared to conventional carbonaceous materials (activated carbon, carbon nanotube, biochar, zeolite, perlite, etc.). In this context, many studies have been carried out on MOFs until today. With the developing technology and studies, the weaknesses of MOFs have also been improved. Various types of MOFs have been produced, including modified MOFs, Metal Organic Gels obtained by adding aerogel-hydrogel and membrane-based MOFs. In this study, it was aimed to examine the effectiveness of these MOF types in the process of dye separation from wastewater. Within the scope of this investigation, MOFs that are effective in the treatment of dye wastewater were evaluated by examining MOF studies in the past years. Adsorption isotherms and kinetics were also examined to understand the effectiveness of MOFs in dye waste-water adsorption. In addition, the effectiveness of characterization studies of MOFs in dye removal was examined. Desorption and reuse of MOFs are also included in the scope of the research as they are important in terms of cost.