Potential application of magnetic iron oxide nanoparticles/hydrogel based on poly (acrylic acid) grafted onto starch for removal of heavy metals from aqueuse solutions

In this paper, magnetic iron oxide nanoparticles/hydrogel was synthesized based on the simultaneous formation of magnetic iron oxide nanoparticles (MION) and hydrogel based on poly (acrylic acid) grafted onto starch (PAA-g-starch). The structural, morphological and magnetic properties of the optimized sample were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transforminfrared spectroscopy (FT-IR), and vibrating sample magnetometer (VSM). The magnetic hydrogels were employed as absorbents for removal of Cu (II) ions from aqueous solutions and the fundamental adsorption behavior was studied. Experimental results revealed that the MION-PAA-g-starch hydrogel exhibit high adsorption capacity with the value of mg/g, and the carboxylate groups on the MION-PAA-g-starch hydrogel surface play an important role in Cu (II) adsorption

Keywords:

Starch , Poly (acrylic acid) , Hydrogel , Heavy metal , Magnetic iron oxide nanoparticle