Adsorption properties for heavy metal ions from aqueous solution of the novel chelating resin loaded quaternary ammonium salt

Abstract

2014): Adsorption properties for heavy metal ions from aqueous solution of the novel chelating resin loaded quaternary ammonium salt, Desalination and Water Treatment,The novel Schiff bases chelating resin loaded quaternary ammonium salt (CPS-QA-SBGL) had been synthesized with the cross-linked Polystyrene-Dimethylamine porous beads (CPS-DMA) as raw materials, which were bonded with glycine on the surface via a quaternary ammonium unit as a linker. CPS-QA-SBGL had been characterized by elemental analysis, infrared spectra and thermo-gravimetric analysis (TGA)-differential scanning calorimetry (DSC) analysis. Factors influencing the uptake of heavy metal ions such as pH, initial metal ion concentrations, shaking time and temperature were investigated systematically by batch experiments. The adsorption equilibrium study exhibited that heavy metal ions adsorption of CPS-QA-SBGL followed a Langmuir isotherm model better than a Freundlich model. The optimum adsorption conditions at 298 K were obtained: the initial concentrations of Pb 2+ , Cd 2+ , Cu 2+ and Cr 3+ were 600 mg/L, pH 5, the equilibrium adsorption uptake time was in 30 min. The kinetic data of adsorption of heavy metal ions on CPS-QA-SBGL were best described by a pseudo-second-order equation, indicating their chemical adsorption process. In addition, dynamic parameters suggest that adsorption of heavy metal ions onto CPS-QA-SBGL is involving an exothermic reaction and occurs spontaneously (△G <0).

Adsorption of As(V), Cd(II) and Pb(II), in Multicomponent Aqueous Systems using Activated Carbons

“…Thus, the simultaneous presence of the three ions in the synthetic multicomponent solution creates competition during the adsorption process. The distinctive adsorption of different metal ions from aqueous solutions has been explained by the differences in their ionic radii and atomic weights, as well as the differences in the affinity of the metal ions towards the active sites on the adsorbent (Abia and Igwe, 2005;Zhang et al, 2015).…”

High performance of hydrophilic polymers on the crosslinked polystyrene spheres for controlling contaminants in white water

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