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  • Küçük Resim
    Öğe
    Adsorption of Uranium (VI) on organic cation-moded kula volcanite and optimization with surface response method (RSM)
    (2023) KAYNAR, Sermin ÇAM; KAYNAR, Ümit Hüseyin
    First of all, the structural characteristics of the prepared HDTMA-volcanite. such as XRF, SEM and BET surface area were examined, then uranium U(VI) adsorption from aqueous solutions was optimized by surface response method (RSM), which is widely used in industrial research. . Effective experimental conditions on adsorption efficiency: pH (3-8), time (30-150 minutes), uranium concentration (20-80 mg/L) and temperature (20-60 °C) were selected. The best possible combinations of these parameters were obtained by the surface response method (RSM). The central composite design (CCD) was chosen for the design of the experimental conditions. According to the RSM results, it was determined that the experimental design fit the quadratic model, and the R2 and R2adj values, which are the parameters showing the model fit, were 0.98 and 0.95, respectively. HDTMA-Volk at optimum conditions. Adsorption capacity was obtained as 4.41 mg/g for the HDTMA-Volcanics at optimum conditions. The compatibility of the obtained data with adsorption isotherms was investigated, and thermodynamic parameters were calculated.
  • [ X ]
    Öğe
    Investigation of Strontium (II) Ions Adsorption onto Long Chain Quaternary Amine Cationic-Volcanite: Modeling and Optimization by RSM
    (2023) KAYNAR, Sermin ÇAM; KAYNAR, Ümit Hüseyin
    In this study, kula volcanite with alkaline basaltic structure and abundant abundance was used for strontium removal by increasing its adsorption capacity with hexadecyltrimethylammonium (HDTMA) organic cation. First, the adsorbent was characterized by XRF, FT-IR and SEM. Then, the adsorption of Strontium (II) ions from aqueous solutions was measured with the ICP device and the experiments were optimized by the surface response method (RSM). Central composite design (CCD) method was used for the study planning in the experiments. The theoretically adsorbed Strontium (II) at optimum values in the study was calculated as 31.978 mg/g. In addition, compatibility of various isotherms and thermodynamic parameters were evaluated in the study. According to the results, it was concluded that this cheap and abundant adsorbent material can be effective in the separation and purification of radioactive wastes, and this structure can also be used in protective containers for the transport of wastes.