Complex Formation, Metal Uptake, and Sorption Kinetics of a Chemically Modified Chlorosulfonated Polystyrene with Aminosalicylic Acid

Abstract

The resin (PsSO2ASA) was synthesized by the reaction of chlorosulfonated polystyrene (Ps-SO2Cl) with 4-aminosalicylic acid (ASA) and characterized by elemental analysis, SEM, EDS, and FT-IR spectral studies and thermal analysis. Its metallopolymer complexes with Co(II), Ni(II), and Cu(II) ions were examined with respect to various experimental parameters. The spectral (FT-IR, electronic, and ESR) studies confirmed that the octahedral complexes formed and the resin bonded to the metal ion through the carboxylato- and phenolato-O atoms. The metal sorption by the resin from aqueous solutions at different conditions was investigated by batch and column methods utilizing ICP−AES. Kinetic studies showed that the adsorption of metal ions onto the resin proceeds according to the pseudosecond order model, and the equilibrium data was best interpreted by the Langmuir isotherm. The sorption capacity was observed in the order of Cu(II) > Co(II) > Ni(II). The calculated thermodynamic parameters indicated an endothermic spontaneous sorption accompanied by deprotonation of the resin and liberation of water of hydration of the metal ions and that adsorbed by the free resin. The degrees of freedom increased at the solid−liquid interface during the sorption of the metal ions onto the resin. The lower detected concentration by the method was found to be (10 to 20) ng mL−1. The method was successfully applied to the analysis of natural water samples.

Synthesis of Resins with Ionic Liquids for Purification of Flavonoids from Hippophae rhamnoides L. Leaves

“…The complex transport behavior of liquids in polymers has been studied extensively for over 60 years and reviewed by several authors. − It is now widely agreed that transport involves both a diffusion process, controlled by a concentration gradient, and a relaxation process, controlled by a time-dependent response of the polymer to a stress. As the relative contributions of these two processes change and interact, a wide range of behaviors can be encountered.…”

Adsorption and desorption characteristics of adlay bran free phenolics on macroporous resins

“…The negative values of enthalpy changes for three resins suggested that the adsorption processes were exothermic. (El-Dissouky, Elassar, & Bu-Olian, 2011;Zhou et al, 2011). Thus, the adsorption processes of adlay bran free phenolics for three resins could be performed at room temperature.…”

Utility of newly modified chitosan in the removal of heavy metal ions from aqueous medium: ion selectivity, XPS and TGA

“…Table 3 and figures 6 and 7 show the thermal decomposition temperatures of modified CS and its complexes with different metals. The weight loss percentage for the CS and its metal complexes in the temperature <200 • C were due to the loss of absorbed or adsorbed water, in addition to H-bonding in the polymeric material [33]. In the case of modified CS, the maximum loss at 275.22 • C was 46.62%.…”