Bazı bioadsorbanların sulu çözeltiden Cr (VI) adsorpsiyonunda kullanımının araştırılması
Çalışkan, Nusret
Ağır metaller, çevresel açıdan sucul ekosistem için en büyük tehditlerin başında gelmektedir. Çeşitli endüstrilerde kullanıldıktan sonra bu endüstrilerin ağır metal içeren sucul ekosistemlere ulaşması sonucunda çevre kirliliğine neden olmaktadır. Bu tez çalışmasında farklı gıda üretim tesislerinden atık olarak üretim sistemlerinden ayrılan Şeftali çekirdeği, Antepfıstığı kabuğu ve Zeytin çekirdeğinin biyoadsorban olarak kullanımı ile sulu çözeltiden Cr(VI)' nın adsorpsiyonunda kullanılabilirliği araştırılmıştır. Gıda üretim tesislerinden atık olarak uzaklaştırılan bu materyaller piyasada farklı sektörlerde yakıt olarak kullanılmaktadır. Bu çalışmada düşük ekonomik değere sahip olan bu materyallerin biyoadsorban olarak kullanım olanakları araştırılarak ekonomik değerlerini arttırmak amaçlan...
Fe‑modified hydrochar from orange peel as adsorbent of food colorant Brilliant Black: process optimization and kinetic studies
Gözmen, Belgin | Turunç, Ersan
The main aims of this work were to produce and characterize Fe-modified hydrochar from orange peel waste, optimize the adsorption through response surface methodology, investigate the role of treatment time, dye concentration, adsorbent dose and temperature, and determine the dominant mechanisms through kinetics analysis. Orange peel waste was hydrothermally carbonized at 200 °C for 8 h, and the hydrochar was embedded with magnetite nanoparticles. The composite adsorbent was characterized through spectrometric and surface analytical methods. Subsequently, analysis of variance was used to design the experimental runs, propose a polynomial equation describing the adsorption process and finally optimize the adsorption conditions. The results indicated that 99% removal can be theoreticall...
Facile synthesis of micro and nano sized iron based metal organic frameworks for optimization of effective metronidazole removal
Belgin Gözmen | Meral Turabik
The widespread application of antibiotics has led to pollution of aquatic systems with long-lasting pharmaceutical residues that pose serious environmental hazards and encourage antibiotic resistance. Metronidazole (MNZ), which belongs to the class of nitroimidazoles used widely, can commonly be traced to occur in water bodies as it possesses high persistence in the environment. To address this issue, this study reports the synthesis of micro and nano sized MIL-101(Fe) metal-organic frameworks (MOFs), or mMIL-101(Fe) and nMIL-101(Fe), by solvothermal and ultrasonic-assisted solvothermal methods, respectively. Comprehensive physicochemical characterization confirmed the successful synthesis of highly porous materials, with mMIL-101(Fe) exhibiting octahedral crystals with average size 2.3 μm...
Preparation and application of Fe-modified banana peel in the adsorption of methylene blue: Process optimization using response surface methodology
Gözmen, Belgin | Turunç, Ersan
Banana peel was used as the feedstock for the preparation of a magnetic adsorbent for the adsorption of methylene blue (MB) in aqueous solutions. The Fe-modified banana peel was characterized by surface and spectrometric methods. The Box-Behnken design (BBD) was used for determining the conditions of each experimental run and optimization of adsorption was achieved through response surface methodology. The R2, adjusted R2, and predicted R2 coefficients of the employed BBD model were determined as 0.9820, 0.9686, and 0.9182, respectively, indicating a high level of agreement between the experimental data and the proposed theoretical model. The optimum MB adsorption of 91.89% was achieved at an adsorption time of 50 min, temperature of 45 °C, adsorbent dosage of 2.5 g and MB concentration of...
