Synthesis of poly(amidoamine)-graft-poly(methyl acrylate) magnetic nanocomposite for removal of lead contaminant from aqueous media

Abstract

Poly(amidoamine)-graft-poly(methyl acrylate) magnetic nanocomposite was synthesized via radical polymerization of methyl acrylate onto modified magnetic nanoparticles followed by the functionalization of the methyl ester groups with poly(amidoamine) dendrimer. The resulting poly(amidoamine)-graft-poly(methyl acrylate) magnetic nanocomposite was then characterized by infrared spectroscopy, transmission electron microscopy, thermogravimetric analysis, scanning electron microscope and X-ray diffraction analysis. Its application as an adsorbent for the removal of Pb(II) ions was studied. The removal capability of the adsorbent was investigated in different pH values, contact time (kinetics) and initial concentration of lead. Moreover, adsorption isotherms were investigated to describe the mechanistic feature of this nanocomposite for adsorption. Accordingly, its high adsorption capacity (310 mg/g) and efficient adsorption toward lead ions in aqueous solution were shown. To further study of the chemistry behind the adsorption process, a comprehensive density functional theory-based study was performed, and a relatively strong interaction between metal ions and adsorbent was observed based on the calculated adsorption free energies.

Function of Nanomaterials in Removing Heavy Metals for Water and Wastewater Remediation: A Review

“…They found that the process of adsorption was pH dependent, and the adsorption capacity order was Pb 2+ > Cu 2+ > Cd 2+ > Ni 2+ , as illustrated in Figure 4 [186]. In another study, magnetic nanocomposites composed of G3-PAMAMgraft-poly (methyl acrylate) were created for the magnetic removal of Pb 2+ ions [187]. At pH 5-6, the maximum adsorption capacity (310 mg/g) was found.…”

A Review: Adsorption and Removal of Heavy Metals Based on Polyamide-amines Composites

“…In addition, iron oxide had poor solubility and tended to form iron hydroxide precipitation at low pH value, and it was not easy to form iron oxide gel. Pourjavadi et al (2016) polymerized methyl acrylate on the surface of activated magnetic particles and then grafted PAMAMs with methyl acrylate group to prepare magnetic nanocomposites (PAMAM-MNC). In general, the composite adsorbent obtained by modifying magnetic nano-material with PAMAMs has a certain potential application value for the development of heavy metal adsorption research.…”

Adsorption of heavy metal ions in water by surface functionalized magnetic composites: a review

“…A. Pourjavadi prepared the PAMAM magnetic nano-hybrid material PAMAM-MNC by this method (Fig. 1b), 18 and the adsorption capacity of Pb 2+ was as high as 310 mg g −1 .…”