STUDY ON THE BEHAVIOR OF BIFUNCTIONAL ION EXCHANGER WITH HYDROXAMIC ACID AND AMIDOXIME GROUPS TO Cu(II) IONS SORPTION

This article analyzes a bifunctional chelating sorbent that is characterized by two functional groups: one of hydroxamic acid and one of amidoxime. A study on copper ions sorption on these bifunctional changers was conducted with static laboratory methods such as PH influence; the retaining process, the distribution factor; the influence of the environment acidity, the concentration of the external solution and the time contact over the retaining of the metallic ions were analyzed; the kinetic properties were also observed, that is, the relative speed of the sorption process, the variation of the apparent Gibbs free energy. The analysis includes the presentation of the method used as well as the results of the procedures conducted in order to retain the metallic ions Cu(II) in comparison with the bifunctional acrylic resin. The procedures were conducted using optical microscopy scanning electron microscopy (SEM)) and X-ray photoelectron spectroscopy (XPS). The chemical analysis was conducted using the EDS procedure. The XPS and EDS analyses clearly showed the existence of copper in the ions changer Cu(II). This aspect definitely demonstrates the special properties of the bifunctional acrylic resin.