Yazar "Ekmekyapar Torun, Fatma" seçeneğine göre listele

Listeleniyor 1 - 4 / 4
  • Küçük Resim Yok
    Öğe
    Comparison of Bomaplex Blue CR-L Removal by Adsorption Using Raw and Activated Pumpkin Seed Shells
    (Sciendo, 2022) Irdemez, Sahset; Ozyay, Gizem; Ekmekyapar Torun, Fatma; Kul, Sinan; Bingul, Zuleyha
    In this study, removal of colour from wastewaters prepared synthetically using Bomaplex Blue CR-L was investigated using raw and activated pumpkin seed shells by adsorption in a batch system. The effects of stirring speed, adsorbent concentration, dye concentration, temperature and pH on colour removal were investigated, and adsorption capacities of raw and activated pumpkin seed shells were determined. In addition, adsorption kinetics, isotherm coefficients, activation energies and thermodynamic parameters were calculated. The optimal adsorption conditions were determined as pH = 2, stirring speed of 200 rpm, adsorbent concentration of 10 g L-1 and 30 degrees C. Under the optimal conditions, the maximum removal efficiency of Bomaplex Blue CR-L using raw pumpkin seed shells was 73.01 %. This value rose to 79.71 % after activation processing was applied. Experimental adsorption data show that the adsorption is more suited to the Langmuir adsorption model and works in accordance with the pseudo-first-order kinetics model. As a result of thermodynamic research, Delta H degrees and Delta S degrees were 31.515 kJ mol(-1) and 109.952 kJ mol(-1) K-1 for the raw adsorbent, respectively. For the activated adsorbent, Delta H degrees and Delta S degrees were 43.118 kJ mol(-1) and 152.237 kJ mol(-1) K-1, respectively. The activation energy of adsorption was calculated as 10.918 kJ mol(-1) for the raw adsorbent and 9.882 kJ mol(-1) for the activated adsorbent.
  • Küçük Resim Yok
    Öğe
    The effect of pH on removal of phosphate from water using aluminum electrodes by electrocoagulation method
    (TUBITAK, 2021) İrdemez, Şahset; Bingül, Züleyha; Kul, Sinan; Ekmekyapar Torun, Fatma; Demircioğlu, Nuhi
    In this study, the effect of wastewater pH on phosphate removal by electrocoagulation method using aluminum plate electrodes was investigated. For this purpose, experiments were carried out at initial pH values ranging from 3-10, and the effect of the initial pH of the wastewater on phosphate removal efficiency, energy consumption and reaction rate was analyzed. From the results obtained, it was determined that the initial pHs of the optimum wastewater was 3 and 4. Because at low pH, both phosphate removal efficiency is high and the energy consumption of the system is low. While 97% removal efficiency is reached in 20 minutes at pHi=3, it increases in this period with the increase of the wastewater initial pH. These data show that the removal rate is higher at lower initial pHs. While the 1st degree reaction rate constant at pHi=3 is k1=0.2154 min-1, this value decreases to k1=0.071 min-1 at pHi=10. At pHi=3, the energy consumption of the system has been determined as 0.553 kWh m-3 in 12 minutes of contact time. In addition, in the measurements made during the trials, it was observed that the highest PO4-P removal occurred during the period when the pH of the system was between 5-7. © 2021, TUBITAK. All rights reserved.
  • Küçük Resim Yok
    Öğe
    Investigation of organic and inorganic matters removal from tannery wastewater using iron plate electrode by electrocoagulation process
    (Taylor & Francis Ltd, 2023) Bingul, Zuleyha; Irdemez, Sahset; Kul, Sinan; Ekmekyapar Torun, Fatma; Demircioglu, Nuhi
    In this study, COD, turbidity, total nitrogen, phosphate, sulphate, oil-grease and chromium removals from wastewaters taken from a local tannery using the electrocoagulation process were examined and the most suitable parameters for the electrocoagulation system were tried to be determined. Soluble iron plate electrodes were used as electrodes in the experiments. As a result of the studies carried out, the most suitable initial pH in uncontrolled pH was determined as pH = 4 and for controlled pH as pH = 5. In studies, the most suitable current density for iron electrodes was determined as 1.2 mA cm(-2). Even if the increase in current density increased the amount of dissolved Fe, it negatively affected the removal efficiency. In addition, the turbidity of the wastewater was removed in 30 minutes, phosphate in 20 minutes and chromium in 15 minutes by 100%. During 60 minutes of operation, while 62.91% of TN, 87.8% of oil-grease were removed, sulphate was removed at the rate of 54.78%. In the studies, 1st and 2nd order kinetic equations for COD removal were examined and it was determined that removal kinetic is more suitable for 2nd order kinetics.
  • Küçük Resim Yok
    Öğe
    Investigation of the effect of current density and PH on oil and grease removal from leather industry wastewaters by electrocoagulation method
    (Yildiz Technical Univ, 2022) Bingul Recber, Zuleyha; Ekmekyapar Torun, Fatma; Kul, Sinan; Irdemez, Sahset
    In this study, the effects of pH and current density on the removal of high concentrations of oil and grease in leather industry wastewater by the electrocoagulation method were investigated. Two different types of electrodes were used in the study. Studies with aluminum electrodes have shown that these electrodes are more effective than iron electrodes in removing oil and grease. In addition, aluminum electrodes are affected more by the system pH than iron electrodes. Studies have shown that higher oil and grease removal efficiencies are obtained below pH 4 for both electrodes. While the oil and grease removal efficiency with Al electrodes is 95% at pH 2, this value decreases to 83% at pH 6. In Fe electrodes, while the removal efficiency is 87.83% at pH 2, it decreases to 83% at pH 6. The effect of current density on oil and grease removal was examined and it was observed that the removal efficiency remained constant above a certain current density in aluminum electrodes. While the efficiency of Al electrodes is 83.31% at 0.6 mA cm(-2) current density, this value has increased to about 98% at 1.2, 1.8, and 2.4 mA cm(-2) current densities. In Fe electrodes, the oil and grease removal efficiency is 82.66% at 0.6 mA cm(-2) current density, while it is 90% at 1.2 and 1.8 mA cm(-2) current densities and 98% at 2.4 mA cm(-2). These results show that the electrocoagulation process removes the oil and grease in wastewater at a high rate. This shows that this process can also be used as pre-treatment before the biological treatment of industrial wastewater with high oil and grease content.