Sürdürülebilir Kalkınma Amaçları
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- MakaleYalnız künye2024Scopus SJRQ2Degradation Products of Rhyolitic Rocks, Adsorption Applications, Isotherm Studies
Fırat, Tülay; Sarıcı-Özdemir, Çiğdem
Heavy metals and their toxicity are a major global concern. They are one of the major environmental problems causing serious problems for living beings. In this study, the adsorption properties of a clay sample located in nature are improved by treating with different materials, and then adsorption properties are examined. It is observed that clay sample can be used in many adsorption applications, including the adsorption of heavy metals such as copper. The clay mineral used in the study was obtained from a rhyolite type rock. Rhyolite rocks, one of the degradation products of volcanic rocks, are the volcanic counterparts of granite. In this study, rhyolite rock was crushed with suitable crushers and grinders, then sieved under 200 mesh with molecular sieve and clay minerals were obtained. The clay samples (K1,K2. K8) were synthesized by subjecting clay with acid and base. Adsorption properties of clay are due to wide surface area, surface functional groups and microporosity. Adsorption of methylene blue and iodine, adsorption from aqueous solutions of copper are done with clay samples and results were compared with samples of clay have not undergone any pre-treatment. In the study, the highest adsorption capacity was determined by applying the Freundlich isotherm. In the K6 sample treated with a base, the highest adsorption capacity was calculated as 26.98 Lg−1. In contrast, the Langmuir isotherm results were calculated in the range of 10.56 to 11.86 Lg−1. This indicates that the adsorption takes place on a heterogeneous surface. The structure and surface properties of clay were examined.
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İncele - 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 - MakaleYalnız künye2018Scopus SJRQ3Kinetics behavior of methylene blue onto agricultural waste
Sarici-Özdemir, Cigdem; Kiliç, Fatih
In the present work, investigations on a potential use of agricultural waste for the removal of methylene blue (MB) from wastewater are presented. Adsorption kinetics of MB has been studied using reaction-based and diffusion-based models. Three kinetic models, namely pseudo-first-order, pseudo-second-order, and the Elovich are analyzed at the temperature of 298 K for the reaction-based model. The kinetic studies showed that the data were well described by the pseudo-second-order kinetic model. Intraparticle diffusion, external-film diffusion, and internal-pore diffusion models characterizing MB were obtained. The results suggested that the agricultural waste has a high potential to be used as an effective adsorbent for MB adsorption. Pseudo-first-order, pseudo-second-order, and the Elovich models were employed to describe the desorption mechanism. The experimental results showed that the pseudo-second-order equation is the best model.
AtıfWoS22OpenAlex23İncele - MakaleYalnız künye2016Scopus SJRQ3Experimental and modeling studies of methylene blue adsorption onto particles of peanut shell
Kiliç, Fatih; Sarici-Özdemir, Cigdem
In this study, adsorption of methylene blue from aqueous solution onto peanut shell has been investigated. Experimental data obtained from dye adsorption have been studied by five two-parameter (Langmuir, Freundlich, Dubinin-Radushkevich, Temkin, and Frumkin) and five three-parameter (Redlich-Peterson, Sips, Toth, Radke-Prausnitz, and Koble-Corrigan) isotherm models. Eight nonlinear error functions (sum squares errors, hybrid fractional error function, Marquardt's percent standard deviation, average relative error, sum of absolute error, the coefficient of determination, nonlinear chi-square test, and standard deviation of relative errors) were examined for isotherm equations. In order to explain the adsorption kinetics fit of pseudo-first-order, pseudo-second-order, Elovich, and intraparticle kinetic models were used. The best fitting isotherm model was the Radke-Prausnitz and kinetics model was pseudo-second-order. Adsorption experiment showed that the maximum capacity of agricultural waste for methylene blue was 67.57 L.g(-1) at 25 degrees C.
AtıfWoS7OpenAlex8İncele - MakaleYalnız künye2010Scopus SJRQ3EVALUATION OF THREE STRAINS OF Pleurotus eryngii ISOLATED FROM GEOGRAPHICALLY DIFFERENT REGIONS OF TURKEY FOR THEIR ABILITY TO DECOLORIZE METHYLENE BLUE AND CHRYSTAL VIOLET
Yildirim, Numan; Yildirim, Nuran Cikcikoglu; Yildiz, Abdunnasir
In this study, the ability to decolorize two chemically different synthetic dyes (methylene blue and crystal violet) by Pleurotus eryngii strains collected from geographically different regions of Turkey was evaluated on agar plates in static liquid cultures. For all strains, growth and decolorization halos were determined on malt extract agar plates containing 0.4 and 0.6 g/L of crystal violet (CV) or methylene blue (MB). Each P. eryngii strain showed certain decolorization capacities and was able to decolorize both MB and CV under static liquid culture conditions, but not to the same extent. The presence of the dyes in static liquid culture reduced the biomass production of all strains in comparison with control culture growing in the medium without dyes. In solid medium, a positive correlation was found between growth halo and decolorization halo.
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