title: Gd-DTPA Adsorption on Chitosan/Magnetite Nanocomposites.
abstract: The synthesis of the chitosan/magnetite nanocomposites is presented. Composites were prepared by co-precipitation of iron(II) and iron(III) salts by aqueous ammonia in the 0.1 % chitosan solution. It was shown that magnetite synthesis in the chitosan medium does not affect the magnetite crystal structure. The thermal analysis data showed 4.6 % of mass concentration of chitosan in the hybrid chitosan/magnetite composite. In the concentration range of initial Gd-DTPA solution up to 0.4 mmol/L, addition of chitosan to magnetite increases the adsorption capacity and affinity to Gd-DTPA complex. The Langmuir and Freundlich adsorption models were applied to describe adsorption processes. Nanocomposites were characterized by scanning electron microscopy (SEM), differential thermal analysis (DTA), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and specific surface area determination (ASAP) methods.
authors.affiliation: Nanomaterials Department, Chuiko Institute of Surface Chemistry of the National Academy of Sciences of Ukraine, 17 General Naumov Str., 03164, Kyiv, Ukraine. chemind@ukr.net.
authors.forename: Ie V
authors.identifier: http://orcid.org/0000-0001-5467-2839
authors.initials: IeV
authors.lastname: Pylypchuk
authors.affiliation: Department of Inorganic Chemistry, Faculty of Chemistry, Maria Curie Skłodowska University, M. Curie Skłodowska Sq. 2, 20-031, Lublin, Poland.
authors.forename: D
authors.initials: D
authors.lastname: Kołodyńska
authors.affiliation: Department of Inorganic Chemistry, Faculty of Chemistry, Maria Curie Skłodowska University, M. Curie Skłodowska Sq. 2, 20-031, Lublin, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Kozioł
authors.affiliation: Nanomaterials Department, Chuiko Institute of Surface Chemistry of the National Academy of Sciences of Ukraine, 17 General Naumov Str., 03164, Kyiv, Ukraine.
authors.forename: P P
authors.initials: PP
authors.lastname: Gorbyk
keywords: Chitosan; Gd-DTPA adsorption; Hybrid nanocomposites; Magnetite; Neutron capture therapy