Low cost biosorbents based on modified starch iron oxide nanocomposites for selective removal of som Low cost biosorbents based on modified starch iron oxide nanocomposites for selective removal of som
Petroleum Application Department, Egyptian Petroleum Research Institute, 1 Ahmed El-Zomor street, Nasr city, Cairo, 11727, Egypt
Adv. Mater. Lett., 2016, 7 (5), pp 402-409
Publication Date (Web): Apr 04, 2016
Copyright © IAAM-VBRI Press
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 Pb2+, Cu2+, and Ni2+ 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 Cu2+, Pb2+ and Ni2+ 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 Ni2+ions with an affinity order of Ni2+>Cu2+>Pb2+. The effect of monomer and initiator concentrations on grafting process was studied. Furthermore, the recyclability of PS-MNPs was investigated.
Heavy metals, potato starch, low cost, adsorbents, magnetic nanoparticles.