The Synthesis of Styrene-Oligoester Copolymer and Investigation of Their Physico-mechanical Properties

The copolymerization reaction of commercial propylene oxide with glycidylmethacrilate in the presence of BF3·O(C2H5)2 catalyst have been investigated. The composition and structure of copolymerization products and anchored functional groups have been determined using IR and gel chromatographic methods. The physico-mechanical properties and utility of polyfunctional unsaturated oligoester were investigated. The obtained thermoset product via the reaction of the oligoester with both styrene and oligostyrene obtained from the bottom of column as a waste material during the rectification operation of styrene in the presence of radicalic initiator has a good adhesion capability, hardness and high heat and water resistance. Thus the waste material was converted to the high valuable polymeric material

Low-pressure catalytic wet air oxidation of aniline over Co 3O4/CeO21

Low-pressure catalytic wet air oxidation of aniline was investigated in a bubble reactor over Co3O4 (10% wt)/CeO2. The catalyst was prepared by sol-gel technology and characterized by using scanning electron microscope, X-ray diffraction, nitrogen adsorption, and thermogravimetric analysis techniques. The aim was to search for the conditions to destroy the aniline content by avoiding production of byproducts such as ammonium, nitrate, and nitrite ions. The reaction was optimized at 0.5 g/L catalyst loading at 150 d`C with a pressure of 4 atm, in 2 h with an air flow rate of 1.36 L/min. A 35.15% amount of aniline was removed, and 14% of the input nitrogen was converted into N2 gas. To evaluate the stability of the catalyst, two consecutive runs were performed by reusing the catalyst recovered. The highest removal with the reused catalyst was found as 34.94%, showing that Co3O4/CeO2 is a stable catalyst. © 2010 American Chemical Society

Comparison of synthesis methods for BiOI/g-C3N4 heterojunction photocatalysts and testing their visible light activity in sugar processing wastewater treatment

The study focused on synthesis of BiOI/g-C3N4 heterojunction photocatalysts by various methods to investigate their physicochemical properties as well as their performances on photocatalytic treatment of sugar processing wastewater. The heterojunction catalysts possessed enhanced catalytic activity compared to the pristine BiOI and g-C3N4. In-situ growth of BiOI on g-C3N4 was determined as the most promising method when the pH of the synthesis medium was adjusted to 10. This method provided a more homogeneous distribution and smaller size for the BiOI clusters that formed a unique flower shape which enhanced the catalytic activity remarkably. This depicts that synthesis conditions are especially important to obtain desired physicochemical properties for a photocatalyst since it has a key role in the crystal structure of BiOI. The optimum nominal weight ratio was determined as 75:25 for BiOI and g-C3N4, respectively by considering the superior morphology and the highest photocatalytic activity for 45.30% and 23.40% total saccharide (TSC) and total organic carbon (TOC) removal, respectively. The photocatalytic mechanism depicted that charge separation in the heterojunction structure was accomplished via the new S-scheme and the oxidation of saccharides and intermediates followed different pathways by reacting with different radicals. © 2023 The Korean Society of Industrial and Engineering ChemistryThis work was supported by Ege University Scientific Research Project Coordination (Grant number: 18-MÜH-021). The authors would like to thank for the analyses in characterization studies which were performed in Ege University Central Research Test and Analysis Laboratory Application and Research Center, Dokuz Eylül University Center for Fabrication and Application of Electronic Materials, Middle East Technical University Central Research Laboratory, and Recep Tayyip Erdoğan University Central Research Laboratory Application and Research Center.Ege Üniversitesi: 18-MÜH-021; Dokuz Eylül Üniversitesi, DEÜThis work was supported by Ege University Scientific Research Project Coordination (Grant number: 18-MÜH-021). The authors would like to thank for the analyses in characterization studies which were performed in Ege University Central Research Test and Analysis Laboratory Application and Research Center, Dokuz Eylül University Center for Fabrication and Application of Electronic Materials, Middle East Technical University Central Research Laboratory, and Recep Tayyip Erdoğan University Central Research Laboratory Application and Research Center

Efficient mineralization of sugar industry wastewater by catalytic wet air oxidation as an eco-friendly method and its kinetic modelling

In this study, catalytic wet air oxidation using lanthanum cobalt oxide (LaCoO3) as catalyst was employed for the efficient treatment of synthetic sugar industry wastewater in a single process. A parametric study was performed to determine the optimum conditions. The results showed that reaction temperature and theoretical air percentage were the most effective parameters. Sugar derivatives were almost completely destroyed at the optimum conditions and total organic carbon (TOC) and chemical oxygen demand (COD) removals were determined as 91% and 87%, respectively, indicating a high mineralization degree, which was the main goal of advanced oxidation. The reaction kinetics were investigated by pseudo-homogeneous and heterogeneous models based on two different parameters: sucrose and TOC concentration. The degree of fit showed that the reaction order was determined as two for the pseudo-homogeneous approach. According to the surface concentration calculations for heterogeneous models, the presence of mass transfer limitations was only observed for oxygen as gas reactant. All heterogeneous models also fitted the reaction rate data accurately, but the Mars–van Krevelen was the selected model for sucrose and TOC oxidation with the best fit. © 2022 Canadian Society for Chemical Engineering.Ege University Research Foundation, Grant/Award Number: 17?MÜH?040; Ege University Scientific Research Project Coordination Funding informationEge Üniversitesi; Ege University Research Foundation: 17?MÜH?04

Obstructive jaundice and acute pancreatitis due to biliary ascariasis

In spite of the fact that intestinal ascariasis is the most common parasitic disease in our country, very few studies on extraintestinal ascariasis have been reported. Complications such as obstructive jaundice, cholangitis and acute pancreatitis as a result of the ascaris lumbricoides passing into the biliary system and pancreatic canal seem to be rare. In this report, a patient with obstructive jaundice, acute cholangitis and an acute pancreatitis attack due to ascaris settling in the extrahepatic biliary canal is presented. The clinical characteristics, diagnosis and treatment are also discussed

Fenton-like oxidation of reactive black 5 in the presence of LABO3 (B: Fe, Co, Mn, Ni) perovskite catalysts

The catalytic performances of LaBO3 (B: Fe, Co, Mn, Ni) perovskite catalysts in Fenton-like oxidation of the textile dye, Reactive Black 5 were compared, and, the optimum reaction conditions were investigated in the presence of the most efficient catalyst. Reactive Black 5 was selected as the model dye due to its complex chemical structure, high water solubility and common usage in the textile industry. The performances of the catalysts in Reactive Black 5 degradation and decolorization were compared by testing different catalyst loadings. According to the catalyst screening experiments, LaFeO3 showed the highest catalytic performance whereas LaCoO3, LaMnO3, and, LaNiO3 were not effective in the degradation and decolorization of Reactive Black 5. A parametric study was carried out in the presence of LaFeO3 catalyst in order to determine the most suitable reaction conditions. In the parametric study, the effect of catalyst loading, pH and the initial H2O2 concentration were investigated. The initial dye concentration and the reaction temperature were kept constant at 100 ppm and 50?, respectively. The most suitable reaction conditions were determined as 0.1 g/L of catalyst loading, 3 and 1 mM of H2O2, and, 96.9% degradation, and complete decolorization were achieved under these conditions. © 2018, Turkish Chemical Society. All rights reserved.15-MUH-030This study was supported by Ege University Scientific Research Project Fund [15-MUH-030]. -

Outer nuclear layer thickness at the central fovea relation with symptom duration in central serous chorioretinopathy

PMID = 2991612