Yazar "Metin, Aysegul Ulku" için listeleme
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Bioremoval of mercury (II) from aqueous solutions by Phragmites australis: Kinetic and equilibrium studies
Kankilic, Gokben Basaran; Metin, Aysegul Ulku; Aluc, Yasar; Bozkaya, Ogun (Taylor & Francis Inc, 2018)In this study, the removal of mercury (II) ions from aqueous solutions by dried biomass of Phragmites australis was investigated in the batch system. The biomass was characterized by Fourier transform infrared spectroscopy ... -
Chitosan based metal-chelated copolymer nanoparticles: Laccase immobilization and phenol degradation studies
Alver, Erol; Metin, Aysegul Ulku (Elsevier Sci Ltd, 2017)Immobilization improves the stability and reusability of enzymes. In this study, laccase, which is a green biocatalyst, was immobilized onto Cu (II)-chelated chitosan nanoparticles via adsorption and successfully applied ... -
Colorimetric Bisphenol-A Detection With a Portable Smartphone-Based Spectrometer
Bayram, Abdullah; Horzum, Nesrin; Metin, Aysegul Ulku; Kilic, Volkan; Solmaz, Mehmet Ertugrul (Ieee-Inst Electrical Electronics Engineers Inc, 2018)Water quality monitoring in resource-limited settings without access to a sophisticated laboratory requires the development of low cost and portable instrumentation. Herein, we propose a newly designed handheld reflection-based ... -
Fibrous polymer-grafted chitosan/clay composite beads as a carrier for immobilization of papain and its usability for mercury elimination
Metin, Aysegul Ulku; Alver, Erol (Springer, 2016)Papain, which is an industrially important enzyme, has been immobilized on fibrous polymer-modified composite beads, namely poly(methacrylic acid)-grafted chitosan/clay. Characterization studies have been done using FTIR ... -
Investigation on phenol degradation capability of Scenedesmus regularis: influence of process parameters
Basaran Kankilic, Gokben; Metin, Aysegul Ulku; Aluc, Yasar (TAYLOR & FRANCIS LTD, 2020)Phenol removal from environmental solutions has attracted much attention due to phenol's high toxicity, even at low concentrations. This study aims to reveal the phenol biodegradation capacity of Scenedesmus regularis. ... -
INVESTIGATION THE PERFORMANCE OF CHITOSAN BASED COMPOSITE BEADS ON REMOVAL OF ANIONIC DYE (AY-204)
Alver, Erol; Metin, Aysegul Ulku; Ciftci, Hakan (Yildiz Technical Univ, 2015)The aim of this study is to investigate the utility of chitosan/zeolite composite beads as adsorbent for removal of anionic textile dye, Acid Yellow 204. It was investigated the influence of parameters such as pH, time, ... -
Methylene blue adsorption on magnetic alginate/rice husk bio-composite
Alver, Erol; Metin, Aysegul Ulku; Brouers, Francois (ELSEVIER, 2020)Magnetic alginate/rice husk (m-ALG/RH) bio-composite beads prepared with ionotropic gelation method and used for methylene blue (MB) removal. Structural analysis of magnetic alginate/rice husk composite beads was performed ... -
Novel magnetic gel beads based on ionically crosslinked sodium alginate and polyanetholesulfonic acid: Synthesis and application for adsorption of cationic dyes
Metin, Aysegul Ulku; Dogan, Deniz; Can, Muzaffer (ELSEVIER SCIENCE SA, 2020)This study offers novel magnetic gel beads as an adsorbent containing bifunctional groups for cationic dye removal. The bifunctional composite gel beads were prepared from polyanetholesulfonic acid, alginate and magnetic ... -
One step effective removal of Congo Red in chitosan nanoparticles by encapsulation
Alver, Erol; Bulut, Mehmet; Metin, Aysegul Ulku; Ciftci, Hakan (Pergamon-Elsevier Science Ltd, 2017)Chitosan nanoparticles (CNPs) were prepared with ionotropic gelation between chitosan and tripolyphosphate for the removal of Congo Red. The production of chitosan nanoparticles and the dye removal process was carried out ... -
Phragmites australis as a new cellulose source: Extraction, characterization and adsorption of methylene blue
Kankilic, Gokben Basaran; Metin, Aysegul Ulku (ELSEVIER, 2020)The aim of this study was to investigate potential use of Phragmites australis in the production of cellulose microfibrils with chemical extraction process. Characterization of the natural P. australis and extracted fibrils ... -
Phragmites australis: An alternative biosorbent for basic dye removal
Kankilic, Gokben Basaran; Metin, Aysegul Ulku; Tuzun, Ilhami (Elsevier Science Bv, 2016)This study is aimed at investigating the removal of methylene blue (MB) from aqueous solutions using a reed species, Phrag-mites australis as an adsorbent. P. australis was modified by means of a chemical treatment, assuring ... -
Poly (methyl vinyl ether-co-maleic acid) - Pectin based hydrogel-forming systems: Gel, film, and microneedles
Demir, Yusuf Kemal; Metin, Aysegul Ulku; Satiroglu, Betul; Solmaz, Mehmet Ertugrul; Kayser, Veysel; Maeder, Karsten (Elsevier Science Bv, 2017)Cross-linking of natural and synthetic polymers is widely explored to achieve the desired material properties (mechanical strength, drug loading capacity, swelling and erosion rates). However, the potential of polymers ... -
Preparation of a novel functionalized magnetic nanobiocomposite as a carrier for protein adsorption
Metin, Aysegul Ulku; Dogan, Mustafa; Erdem, Umit; Babacan, Taner; Gungunes, Hakan (TAYLOR & FRANCIS INC, 2020)This study aims the synthesis of a novel functionalized magnetic nanocarrier based on xanthan gum biopolymer. Glycidyl methacrylate was grafted on xanthan gum chains by radical polymerization reaction using two types of ...