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.
Deepak Pathania; Reena Sharma;Susheel Kalia
Abstract
The graft copolymerization of acrylic acid onto gelatinized potato starch has been carried out at 70ºC using chromic acid as an initiator. The different reaction parameters such as reaction temperature, initiator and monomer concentrations were optimized to get the maximum percentage grafting. The ...
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The graft copolymerization of acrylic acid onto gelatinized potato starch has been carried out at 70ºC using chromic acid as an initiator. The different reaction parameters such as reaction temperature, initiator and monomer concentrations were optimized to get the maximum percentage grafting. The maximum grafting (93.54%) was observed at 60 ºC, 0.57 molL-1 of acrylic acid and 0.03 mmolL-1 of chromic acid. The grafted samples were evaluated for other physico-chemical properties such as swelling behavior, moisture absorption and chemical resistance. The grafted samples were characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and thermogravimetric analysis (TGA) techniques. The graft copolymers have been successfully used for the removal of metal ions and organic dyes from aqueous system.
Deepak Pathania; Reena Sharma
Abstract
The graft copolymerization of methacrylic acid onto gelatinized potato starch has been carried out at 70 0 C using chromic acid as initiator. The different reaction parameters such as effect of temperature, initiator and monomer concentrations were optimized to determine the maximum percentage grafting. ...
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The graft copolymerization of methacrylic acid onto gelatinized potato starch has been carried out at 70 0 C using chromic acid as initiator. The different reaction parameters such as effect of temperature, initiator and monomer concentrations were optimized to determine the maximum percentage grafting. The maximum grafting efficiency of 87.5% was optimized at reaction temperature (60 0 C), monomer concentration (0.81molL -1 ) and initiator concentration (0.02 mmol.L -1 ). The grafted samples were evaluated for other physico-chemical properties such as swelling behavior, moisture absorption and chemical resistance. The grafted samples were characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD) and thermogravimetric analysis (TGA) techniques. The additional peaks observed in FTIR spectra of grafted samples confirmed the grafting of monomer onto gelatinized starch. The grafted co-polymers have been successfully used for the removal metal ions and organic dyes from aqueous system.
