Abdul-Raheim M. Abdul-Raheim; El-Saeed Shimaa M.; Farag Reem K.; Abdel-Raouf Manar E
Abstract
In this work, the starch extracted from potato peels was modified with acrylic acid. Nanoparticles composed of modified starch polymer and Fe3O4 (modified potato starch-magnetic nanoparticles, MPS-MNPs) were synthesized. The prepared nanoadsorbents were used for selective exclusion of Pb 2+ , Cu 2+ , ...
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In this work, the starch extracted from potato peels was modified with acrylic acid. Nanoparticles composed of modified starch polymer and Fe3O4 (modified potato starch-magnetic nanoparticles, MPS-MNPs) were synthesized. The prepared nanoadsorbents were used for selective exclusion of Pb 2+ , Cu 2+ , and Ni 2+ ions from water. They were characterized by different analytical instruments such as FTIR, TEM and XRD. Adsorption of all captured metal ions onto MPS-MNPs was observed to be reliant on temperature, pH and contact time. Clump adsorption balance was come to in 60 min and most extreme uptakes for Cu 2+ , Pb 2+ and Ni 2+ in non-aggressive adsorption mode were 100, 70 and 100 mgg −1 , respectively at 35 â—¦C. In focused adsorption tests, PS-MNPs specially adsorbed Ni 2+ ions with an affinity order of Ni 2+ >Cu 2+ >Pb 2+ . The effect of monomer and initiator concentrations on grafting process was studied. Furthermore, the recyclability of PS-MNPs was investigated.
Ivo Safarik; Kristyna Pospiskova; Eva Baldikova; Mirka Safarikova
Abstract
Diamagnetic biological materials of various origins (e.g., prokaryotic and eukaryotic microbial cells, lignocellulosic materials, food wastes, soluble and insoluble biopolymers etc.) can be magnetically modified in order to obtain smart biomaterials exhibiting an appropriate response to external magnetic ...
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Diamagnetic biological materials of various origins (e.g., prokaryotic and eukaryotic microbial cells, lignocellulosic materials, food wastes, soluble and insoluble biopolymers etc.) can be magnetically modified in order to obtain smart biomaterials exhibiting an appropriate response to external magnetic field. Magnetic modification of originally nonmagnetic biological materials is usually based on the attachment of magnetic iron oxides nano- and microparticles on the surface or within the pores of the treated material, or by their entrapment in the gel structure. Magnetic modification can be performed using different procedures, e.g., by magnetic fluid treatment, mechanochemical synthesis and by direct or indirect microwave assisted synthesis. This short review will summarize magnetic modification procedures developed by the authors and applications of advanced magnetically modified biomaterials as adsorbents of both organic and inorganic xenobiotics and radionuclides, affinity adsorbents for isolation of target biomolecules, carriers for various affinity ligands, biologically active compounds and cells or whole-cell biocatalysts. The potential of magnetically responsive biomaterials will increase in the near future.
