Chemical Engineering / Kimya Mühendisliği

Permanent URI for this collectionhttps://hdl.handle.net/11147/14

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Author: search.filters.author.Arslanoğlu, EsraPublisher: search.filters.publisher.Springer

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  • Article
    Citation - WoS: 7
    Citation - Scopus: 7
    Modification of Grape Pulp With Citric Acid for the Production of Natural Ion Exchanger Resin and Removal of Pb (ii) and Cd (ii) From Aqueous Solutions: Kinetic, Thermodynamics, and Mechanism
    (Springer, 2021) Arslanoğlu, Esra; Eren, Muhammet Ş. A.; Arslanoğlu, Hasan; Çiftçi, Harun
    In this study, grape pulp (MGP) modified with NaOH and citric acid was used in the production of natural ion exchangers. The effects of parameters such as initial pH, MGP dosage, temperature, initial metal ion concentration, and contact time on the removal of Pb (II) and Cd (II) ions from aqueous solutions using modified materials were investigated by batch experiments. It was found that the experimental kinetic data fit the second-order model, and the activation energy for Pb (II) and Cd (II) adsorption processes were 20.68 and 38.61 kj mol(-1), respectively. Although the initial adsorption rate increases with increasing temperature, the adsorption efficiency slightly decreases. It was calculated that the equilibrium data fit the Langmuir isotherm better, and the maximum adsorption capacities for Pb (II) and Cd (II) adsorption processes were approximately 1.496 and 1.022 mmol g(-1) at 25 degrees C, respectively. Thermodynamic analysis has shown that the adsorption processes of Pb (II) and Cd (II) are exothermic (Delta H degrees(Pb) = -35.68 kj mol(-1), Delta H degrees(Cd) = -21.19 kj mol(-1)) and have a self-developing character.
  • Article
    Citation - WoS: 15
    Citation - Scopus: 17
    Fabrication, Characterization, and Adsorption Applications of Low-Cost Hybride Activated Carbons From Peanut Shell-Vinasse Mixtures by One-Step Pyrolysis
    (Springer, 2021) Arslanoğlu, Esra; Eren, Muhammet Şakir Abdullah; Arslanoğlu, Hasan; Çiftçi, Harun
    The present work aims to develop an innovative, alternative, fast, and cost-effective one-step pyrolysis method for activated carbon production using peanut shell and vinasse mixture. This facile procedure is based on single-step carbonization treatment at a temperature range of 400-800 degrees C. Different carbonization time (15-360 min), impregnation ratio (1-3 g/g), impregnation time (3-24 h), and nitrogen flow rate (300 and 600 ml/min) were examined. The chemical and physical properties of the activated carbon examined by SEM-EDX, FT-IR analysis, particle size distribution, iodine number, pH(zpc), BET surface area, and surface functional group analysis by Boehm's titration. The results illustrate that the values of BET surface area, total pore volume, average pore diameter, iodine number, pH(zpc), and carbon content of activated carbon were found as 1290.5 m(2)/g, 0.5667 cm(3)/g, 21.2 angstrom, 1258.4 mg/g, 5.7, and 86.89%, respectively.