Chemical Engineering / Kimya Mühendisliği
Permanent URI for this collectionhttps://hdl.handle.net/11147/14
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Article Citation - WoS: 7Citation - Scopus: 7Modification 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, HarunIn 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: 15Citation - Scopus: 17Fabrication, 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, HarunThe 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.Article Citation - WoS: 68Citation - Scopus: 72Production of Microporous Cu-Doped Btc (cu-Btc) Metal-Organic Framework Composite Materials, Superior Adsorbents for the Removal of Methylene Blue (basic Blue 9)(Elsevier, 2020) Eren, Muhammet Şakir Abdullah; Arslanoğlu, Hasan; Çiftci, HarunCellulosic woven waste was used as a biomass material to prepare a Cu-doped BTC (Cu-BTC) adsorbent, which was then used to remove methylene blue (Basic Blue 9) from wastewater. Cellulosic woven waste was used as a biomass material to prepare a Cu-doped BTC (Cu-BTC) adsorbent, which was then used to remove methylene blue (Basic Blue 9) from wastewater. The Cu-BTC had higher adsorption capacity for methylene blue (BB9) than pure woven waste because it had high specific surface area and electrostatic interaction with cationic methylene blue molecules. The Cu-BTC removed methylene blue from wastewater rapidly and effectively and had an excellent adsorption capacity (197.90 mg/g). In batch process, the adsorption efficiency of the adsorbent for removal of BB9 was evaluated within 20 degrees C-60 degrees C, with initial BB9 concentrations of 50 - 200 mg/L and initial pH of 2 -11. The Cu-BTC activation tailored the topological and textural properties of the obtained adsorbent, leading to a relatively large surface area of 1418.3 m(2)/g and pores with a volume of 0.491 cm(3)/g and an average size of 2.11 nm. The adsorption process fitted well with the Langmuir isotherm and the pseudo-second-order kinetic model. The possible mechanism for methylene blue removal mainly involved electrostatic attraction and micro pores. This study can serve as a guide for value-added utilization of cellulosic woven waste and as a practical method for the removal of methylene blue from wastewater. Adsorption of methylene blue onto the CuBTC is an effective and eco-friendly method for its removal from wastewater.Article Cu2+, Zn2+ve Mn2+ ile Yüklenmiş Sitrik Asitle Modifiye Şeker Pancarı Küspesinden Metallerin Çeşitli Sulu Ortamlardaki Salınımları(Fırat Üniversitesi, 2014) Arslanoğlu, Hasan; Çiçek, Ahmet Uğur; Kuma, Burak Muhammet; Kardaş, Mahmut; Tümen, FikretBu çalışmada, metal iyonlarıyla doygun modifiye şeker pancarı küspesi pH?5’deki çeşitli ortamlar kullanılarak kolonda perkolasyon testlerine tabi tutulmuştur. Modifiye şeker pancarı küspesine bağlanmış olan Cu2+, Zn2+ ve Mn2+ iyonları su ortamına çok düşük seviyelerde; humik asit-Na tuzu, sitrik asit ve EDTA-Na tuzu gibi kompleksleştiricilerin varlığında ise nispeten yüksek miktarlarda salındığı belirlenmiştir. Metal iyonu bağlamış 2.5 g modifiye şeker pancarı küspesi üzerinden 1500 ml sıvı sızdırılarak yapılan testlerde su için en fazla % 18, kompleksleştirici içeren çözeltilerle % 77’ye varan miktarlarda metal iyonu çözelti ortamına salınmaktadır. Sonuç olarak, modifiye şeker pancarı küspesinin sulu ortamlardan, aynı zamanda bitkiler için mikro besin maddesi olan, bakır, çinko ve manganı gidermede kullanıldıktan sonra yavaş çözünen bir mikro gübre olarak değerlendirilebileceği ifade edilebilir.