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چکیده
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This study details the synthesis of a magnetic Co/Co(OH)2@Co-Al LDH@ZIF composite adsorbent to remove chlorate and bromate ions from water samples. The synthesis involved a reaction between metallic cobalt and hydrogen peroxide in deionized water to form Co/Co(OH)2 nanoparticles. Subsequently, a layered double hydroxide (LDH) was created using cobalt(II) chloride hexahydrate, aluminum nitrate nonahydrate, and urea. In the final step, a Zeolitic Imidazolate Framework (ZIF) was synthesized from cobalt(II) chloride hexahydrate and 2-methylimidazole dissolved in methanol. The resulting adsorbent was extensively characterized using analytical techniques, including field emission-scanning electron microscopy (FE-SEM) to diagnosis morphology, vibrating sample magnetometry (VSM) for magnetic properties, Fourier-transform infrared spectroscopy (FT-IR) to identify functional groups, X-ray diffraction (XRD) for crystalline properties, and Brunauer-Emmett-Teller (BET) analysis for investigating of porosity and surface area. The influence of various parameters, such as solution pH, temperature, and contact time, on the adsorption efficiency was studied. Adsorption isotherm analysis at different temperatures revealed that the Langmuir isotherm model accurately describes the composite’s adsorption behavior, and thermodynamic parameters were also determined.
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