الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The different applications of polymer nanocomposites and high removal efficiency of ion exchange processes showed an interesting vision to use it in the removal process of heavy metals from wastewater. So in this work, an effective ion exchanger polymer nanocomposite from organic polymer and nanoparticles from CuKHCF was achieved and used for extraction of Cs ions in aqueous solutions through ion exchange process. The prepared ion exchanger (polymer nanocomposite) was achieved through natural polymer with chemical modifications. The natural polymer in this work is chitosan, which reacted with chloroacetic acid in isopropanol and NaOH as solvents to obtain O-CMC.
The CuKHCF nanoparticles was prepared by reacting CuSo4.5H2O and K4Fe (CN)6.3H2O in the presence of 6% polyvinyl alcohol (PVA). The ion exchanger polymer nanocomposite (CuKHCF-O-CMC) was obtained through mixing nanoparticles of CuKHCF with O-CMC in aqueous medium. The chemical composition of the prepared materials was confirmed by FT-IR that confirming the introducing of nanoparticles CuKHCF inside polymer matrix (O-CMC) through the appearing of sharp peak of C≡N group in spectra that present in CuKHCF and CuKHCF-O-CMC. The surface morphology and particle size of CuKHCF was reported by transmission electron microscope (TEM) and scanning electron microscope (SEM) that showed the particle sized of CuKHCF in range of 10-50 nm with cubic structure. Also, the morphology of O-CMC and CuKHCF-O-CMC was studied by SEM-EDX to prove the introducing of CuKHCF inside O-CMC through the appearing of Cu2+, K+ and Fe2+ peak in SEM-EDX and also, Cs+ peak was appeared after treatment of cesium solution with CuKHCF-O-CMC and investigated the ion exchanger polymer nanocomposite after treatment with cesium solution by SEM-EDX. The thermal stability of the prepared O-CMC and CuKHCF-O-CMC was studied through TGA and DTG.
The prepared CuKHCF-O-CMC was applied by batch and column methods for the removal of Cs+ from aqueous solutions. In batch method, the process was optimized through studying four different conditions such as PH of Cs+ solutions, initial concentration of Cs+ ions, contact time and temperature. from studying these variables, the obtained results showed that the highest capacity was 1.71 mmol/g for Cs+ ions at initial concentration 10 mmol/L and contact time 2hrs at 25 °C. Also, thermodynamics parameters showed the endothermic and spontaneous natural of the sorption process. The sorption process was also achieved by column technique. Also, Models of Thomas and Yoon-Nelson were employed to assess the performance of the column adsorption. Examining the composite’s ability for regeneration was studied through five times for repeated adsorption-desorption cycles at a bed height of 1.6 cm, a flow rate of 1 mililitres per minute, and a Cs+ concentration of 4 millimoles per liter. The composite was utilized once more in subsequent sorption experiments following the elution of each column by 2.0 M KCl.