Polymerization of acrylic acid on chitosan by gamma radiation and its application for the removal of metal ions from aqueous solutions

Ghazy, Omayma; Khalil, Salwa A.; El-Naggar, Amal A.; Mahdy, S.R.; Senna, Magdy M.

doi:10.21608/ejchem.2021.74367.3672

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“…Activated carbons, plant or lingo-cellulosic wastes, clays, and chitosan were used as adsorbents to remove dyes [5]. Fe3O4 magnetic nanoparticles (MNPs) modified with 3-aminopropyltriethoxysilane and acrylic acid/ crotonic acid copolymers were used to remove heavy metal ions (Cd2+, Zn2+, Pb2+, and Cu2+) from aqueous solution [6]. Removal of heavy metal ions with a hydrogel based on ethylenediamine tetraacetic acid (EDTA), crosslinked chitosan crosslinked polyacrylamide initiated by N,N-methylenebis (acrylamide) (MBA) was reported [7].…”

Section: Introductionmentioning

confidence: 99%

Characterization and metal sorption of polyacrylamide/chitosan nanocomposite hydrogels synthesized by gamma radiation.

khalil,

El-naggar,

khafaga

2023

Egypt. J. Chem.

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Gamma irradiation was used to prepare nanocomposite hydrogels composed of polyacrylamide (PAM) and chitosan nanoparticles (CS-NPs). The hydrogels were investigated by FT-IR spectroscopic analysis, thermogravimetric analysis (TGA) and the measurements of swelling in water. The metal sorption and kinetics for Cu +2 , Pb +2 and Fe +3 metal ions was investigated. The results of TGA analysis showed that the PAM/CS-NPs hydrogels had lower thermal stability than PAM hydrogel. It was found that PAM and PAM/CS-NPs hydrogels reached the equilibrium swelling in water at 4 hours. However, PAM/CS-NPs hydrogels displayed higher swelling in water than PAM hydrogel. The metal sorption study showed that PAM/CS-NPs nanocomposite had high affinity and selectivity for the metal ions according to the order: of Cu +2 > Pb +2 > Fe +3 . On the other hand, the sorption by the hydrogel networks is controlled by applying Fick's law.

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Section: Introductionmentioning

confidence: 99%