Person: KAHRAMAN, MEMET VEZİR
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KAHRAMAN
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MEMET VEZİR
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Publication Metadata only Nanodiamond-containing polyethyleneimine hybrid materials for lead adsorption from aqueous media(WILEY, 2019) KAHRAMAN, MEMET VEZİR; Cigil, Asli Beyler; Urucu, Oya Aydin; Kahraman, Memet VezirThis study describes the preparation of new surface-modified nanodiamond (ND) particles containing urethane-based hybrid materials by photopolymerization of aliphatic urethane acrylate, trimethylolpropane triacrylate, glycidyl methacrylate monomers, and their usage for lead adsorption from aqueous media. ND and synthesized surface-modified ND were characterized by atom transfer radical addition Fourier transform infrared spectroscopy (ATR-FTIR) and scanning transmission electron microscopy analysis. Crosslinked adsorbent nanocomposites were then treated with polyethylene imine and all adsorbent nanocomposites were characterized by ATR-FTIR, scanning electron microscopy, thermogravimetric analysis, and contact angle measurements. The metal ion binding capacity of the surfaces of the nanocomposites containing high amine content was investigated. The effects of the percentage of functional monomer, pH, and contact time on adsorption, and the interaction of foreign metal ions have been tested. Optimum contact time was found to be 7 h at pH 5. The adsorption capacity of the synthesized nanocomposite adsorbent for lead (II) was determined as 17.12 mg g(-1). Langmuir and Freundlich isotherms were used to determine the adsorption behaviors and Langmuir isotherm model was found to be the most suitable model (R-2: 0.9988). The amount of adsorption of Pb (II) ions of UV curable adsorbent film prepared in river water samples was investigated. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48241.Publication Metadata only Cellulose/cysteine based thiol-ene UV cured adsorbent: removal of silver (I) ions from aqueous solution(SPRINGER, 2021) BİRTANE, HATİCE; Cigil, Asli Beyler; Urucu, Oya Aydin; Birtane, Hatice; Kahraman, Memet VezirIn the present study, a novel, eco-friendly, and simple polymeric adsorbent was obtained from cellulose acetate butyrate (CAB) and cysteine (Cys) to remove silver (I) ions in the presence of a thiol-ene click reaction under UV rays. Accordingly, firstly, CAB was modified with acrylate groups to turn it into a photocurable resin. Then, the acrylate modified CAB obtained with the monomer having cysteine and triacrylate group was crosslinked by thiol-ene click reaction under UV rays to obtain an eco-friendly adsorbent. The adsorbent acquired -S-, -COO and -NH2 groups as a result of this reaction and these functional groups are known to have the ability to selectively couple with Ag(I) ions. The adsorbent was evaluated for the selective removal of Ag(I) ions from aqueous samples characterized by SEM, SEM-EDAX, and FTIR. To determine the most suitable conditions, the effect of important parameters such as pH and contact time was investigated. It was determined that the most suitable isotherm for adsorption was the Langmuir isotherm (R: 0.999). The efficacy of our eco-friendly adsorbent was investigated in a real stream and lake waters and very good results were achieved. [GRAPHICS] .Publication Metadata only Selective molecularly imprinted polymer for the analysis of chlorpyrifos in water samples(ELSEVIER SCIENCE INC, 2020) KÖK YETİMOĞLU, ECE; Urucu, Oya Aydin; Cigil, Asli Beyler; Birtane, Hatice; Yetimoglu, Ece Kok; Kahraman, Memet VezirIn this paper, a new molecularly imprinted solid-phase extraction (MISPE) method was described for the determination of the chlorpyrifos in water samples. A thiol-ene based UV-cured polymer was prepared by mixing glyoxal bis (-diallyl acetal), pentaerythritol tetrakis (3-mercaptopropionate), polyethylene glycol diacrylate (PEGDA), and photoinitiator. Chlorpyrifos was added to the prepared polymer as a template analyte, and its analysis was performed by gas chromatography with mass detection (GC-MS). The influence of some analytical parameters was studied. We found that the use of the molecularly imprinted polymer (MIP) UV-cured disc provides an easy, selective, and available solution for removing chlorpyrifos from water samples. (C) 2020 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.