Yazar "Mavlan, Miran" seçeneğine göre listele

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    Applications and impact of nanocellulose based adsorbents
    (Springer, 2020) Köse, Kazım; Mavlan, Miran; Youngblood, Jeffrey P.
    Abstract Efficient separation and removal is necessary in applications ranging from environmental remediation to the food sector. A well-designed adsorption system should meet the demands for high efficiency in a cost and time effective manner. In wastewater treatment, the ideal chemical feedstock used to synthesize the adsorbents should themselves been environmentally friendly (i.e. non-toxic) to avoid subsequent environmental issues. Nanocellulose, made of the most abundant organic biopolymer on earth, fulfills many criteria to fit the profile of a highly safe, but efficient adsorbent. A survey of the literature reveals that nanocellulose materials have a proven track record as viable alternatives as adsorbents. To summarize these recent advances, this review describes the methodologies under current use for such designs and gives a systematic overview of these technologies to promote a more focused research in the future for nanocellulose based adsorbent materials
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    Öğe
    Cholesterol removal via cyclodextrin-decoration on cellulose nanocrystal (CNC)-grafted poly(HEMA-GMA) nanocomposite adsorbent
    (Springer, 2021) Kose, Kazim; Mavlan, Miran; Uzun, Lokman; Youngblood, Jeffry P.
    Glycidyl methacrylate (GMA) was grafted to cellulose nanocrystals (CNCs) using hydroquinone resulting in a crosslinkable nanoparticle. 2-Hydroxyethyl methacrylate (HEMA) was used to polymerize this nanoparticle to obtain a polymeric structure with a bridging CNC structure to which cyclodextrin (CD) was attached in order to better capture hydrophobic biomolecules. X-Ray Microscopy and nuclear magnetic resonance methods provided the main characterization data proving the successful modification process. This CD-modified nanocomposite adsorbent was used for the removal of cholesterol and low-density lipoprotein for the first time. Adsorption performance in a continuous system was similar to 99% for both cholesterol and low-density lipoprotein with agreement between experimental data and mathematical models performed. Overall, results indicate that cyclodextrin modified poly(HEMA-GMA-g-CNC) is a promising material for use as an adsorbent for biological and biomedical applications.
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    Öğe
    TEMPO-oxidized cellulose nanofiber based polymeric adsorbent for use in iron removal
    (Springer, 2020) Kose, Kazim; Mavlan, Miran; Nuruddin, Md; Youngblood, Jeffrey P.
    Cellulose nanofibrils (CNFs), as one of the most abundant renewable nanomaterials, has garnered interest in numerous fields owing to its many any advantages such as good mechanical properties, high surface area and surface tunability. Recently, CNFs have been shown to be a valuable candidate in water and soil treatment. In this study, adsorption of Fe(II) cations onto poly(2-hydroxy ethyl methacrylate-glycidyl methacrylate) cryogels was improved by addition of TEMPO-oxidized cellulose nanofibers (CNF). Characterization of CNF modified polymeric structures was performed using scanning electron microscopy. The effects of varying pH, initial Fe(II) concentration, and time were investigated during the study and a comparison was made to Fe(III) adsorption. Kinetic calculations were performed using Langmuir, Freundlich and Redlich-Peterson adsorption models.to understand the binding of Fe(II) cations onto the composite cryogel.