Low Cost Biosorbents Based On Modified Starch Iron Oxide Nanocomposites For Selective Removal Of Some Heavy Metals From Aqueous Solutions
Abdul-Raheim M. Abdul-Raheim, El-Saeed Shimaa M., Farag Reem K., Abdel-Raouf Manar E.*
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
DOI: 10.5185/amlett.2016.6061
Publication Date (Web): Apr 04, 2016
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E-mail: drmanar770@yahoo.com
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.
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