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    Dichromate and phosphate sorption capacity of bis formyl calix[4]arene on superparamagnetic iron oxide nanoparticles in aqueous phase
    (Chemical Publishing Co., 2016) Ozcan, F.; Aygün, Ahmet; Sevil, U.A.; Ertul, S.
    Calix[4]arene derivatives were added into aqueous phase phosphate and dichromate solutions in order to investigate sorption capacity at pH of 1.5 to 5.5. A 25 mg of polymers magnetic calix[4]arenes derivatives was added into the flask shaking at 180 rpm for 1 h at room temperature. pH controls ionic forms of phosphate and dichromate, resulting in their binding capacity to the polymers. Maximum sorption capacity was 96.6 % at pH 2.5 for phosphate and 90.1 % for chromium at pH 3.5. Different polymers may be selective for ions due to their versatility and special characteristics. As a result, magnetic nanoparticle polymers showed both super-paramagnetic behaviour and high sorption capability across dichromate and phosphate ions. © 2016, Chemical Publishing Co. All rights reserved.
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    Use of Humic Acid-based Nanofibers for Dye Removal and Transport
    (Ieee, 2017) Ayyildiz, H. F.; Ozcan, F.; Ertul, S.; Kara, H.; Aygün, Ahmet
    A highly efficient nanofibrous adsorbent was prepared by using a mixture of humic acid (HA) and polyacrylonitrile (PAN) in DMF via electrospinning process, and the obtained nanofibrous adsorbent (PAN-HA) was used in copper removal. Owing to the incorporation of functional groups of HA, PAN nanofiber was turned into a material (PAN-HA) exhibiting anionic and cationic dye transfer. The prepared nanofiber mat was found to exhibit a suitable morphology according to the results of scanning electron microscopy, SEM, images. In this study, the removal and transport of HA-doped PAN nanofibers at different ratios (0-100%) at different pH and concentrations of methyl oranj, congo red, rodamin B and navy blue are carried out in a special membrane system. The results were evaluated in the design expert program.