Application of Adsorption Microcalorimetry in the Study of Cu(II) Removal Using Magnetic Nanoparticles

Abstract

ABSTRACT:The objective of this study was to explain the synthesis of magnetic polymer adsorbent (FePA) nanoparticles coupled with metal-chelating ligands of N-(2-acetamido)iminodiacetic acid (ADA) and their application for the removal of Cu(II) ions. Nanoparticles of magnetite-polyvinyl acetate (denoted as Fe-PVAC) were synthesized by coating Fe 3 O 4 (magnetite) with PVAC and vinyl acetate (VAC). Several sequential procedures were performed, and the coupling property of ADA was subsequently used to introduce functional groups on the surface of the Fe-PVAC nanoparticles. These sequential procedures yielded the following: magnetite-polyvinyl alcohol, nanoparticles of magnetite-polyvinyl propenepoxide and nanoparticles of magnetite-PVAC-ADA (Fe-PVAC-ADA). An example of the application of Fe-PVAC-ADA was explained by adsorbing Cu(II) ions, which can be chelated by the metal-chelating ligands of ADA in aqueous solution. Batch experiments were performed to determine the kinetics and mechanism of Cu(II) adsorption by the Fe-PVAC-ADA nanoparticles. The adsorption of Cu(II) on Fe-PVAC-ADA was monitored by adsorption microcalorimetry.

Effect of Surface Functionalization on the Adsorption of Arsenic Using Magnetite Nanocrystals

“…The removal of water pollutants using nanomaterials has become a very promising alternative due to the advantages exhibited by these nano-scale crystals compared with traditional methods of remediation. These advantages include high adsorption capacity per unit mass, absence of degradation by-products, environmental friendliness, capability for tailoring of the surface chemistry and the possibility of recovering the nanocrystals using an external magnetic field (Raven et al 1998;Liang et al 2010;Wang et al 2010;Zhang et al 2010;Giraldo and Moreno-Piraján 2012;Guan et al 2012;Atta et al 2013).…”