Abstract
The paper presents the synthesis and preliminary characterization of two novel solid-phase sorbents for iron(III), resulting from the functionalization of ethylene-vinyl alcohol copolymer (EVOH) with deferoxamine, DFO (DFO@EVOH), and a novel tripodal 3-hydroxy-4-pyridinone, named 3,4-HP (3,4-HP@EVOH). DFO and 3,4-HP have been covalently bonded to EVOH, using carbonyldiimidazole as a coupling agent. Before their use as Fe(III) sorbents, they were warm-pressed to obtain a thin film. Polymers have been characterized by conventional physico-chemical techniques; furthermore, the sorption properties towards Fe(III) were investigated. The physico-chemical characterization of the new solid-state devices demonstrates the effective linkage of the two receptors on the polymeric support. Despite a relatively low sorption capacity for both materials, the stoichiometry and the complexation constants of Fe(III)/DFO@EVOH and Fe(III)/3,4-HP@EVOH are in pretty good agreement with those obtained for the same ligands in aqueous solutions.
Highlights
Iron is the fourth most abundant element in the Earth’s crust, with an abundance of 5~6%
Fe(III) is moderately toxic compared to other transition metal ions but it is classified as an environmental pollutant at high concentrations; excessive iron(III) provokes several health problems [2]
One of the most severe effects of iron overload is the capacity of the Fe(II)/Fe(III) redox cycle to produce dangerous hydroxyl free radicals; on the contrary, low iron(III) levels reduce its concentration in the hemoglobin and generate
Summary
Iron is the fourth most abundant element in the Earth’s crust, with an abundance of 5~6%. Iron is a metal essential for life, involved in many strategic metabolic pathways, such as in the oxygen transport system and the electron transfer chain (respiration). Fe(III) is moderately toxic compared to other transition metal ions but it is classified as an environmental pollutant at high concentrations; excessive iron(III) provokes several health problems [2]. The presence of Fe(III) in biological systems has to be efficiently moderated since both its deficiency and overloading can induce several biological disorders [3]. One of the most severe effects of iron overload is the capacity of the Fe(II)/Fe(III) redox cycle to produce dangerous hydroxyl free radicals; on the contrary, low iron(III) levels reduce its concentration in the hemoglobin and generate
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
