Synthesis of Chitosan/Graphene Oxide-Ferric Oxide Composite via Coprecipitation: An Upgraded Adsorbent Material for Methylene Blue Dye Removal
محتوى المقالة الرئيسي
الملخص
This study addresses the critical need for effective dye removal in wastewater treatment by developing a chitosan/graphene oxide-ferric oxide (CS/GO-Fe2O₃) composite through a coprecipitation method. The primary objective was to evaluate its adsorption performance for methylene blue (MB), a model cationic dye, while optimizing key operational parameters. The composite was systematically characterized using X-ray diffraction (XRD), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), and Brunauer-Emmett-Teller (BET) analysis. XRD patterns confirmed the integration of crystalline Fe2O₃ nanoparticles with a crystallite size of 19.25 nm within the composite matrix, while SEM-EDS revealed a transformation from a dense chitosan morphology to a highly porous structure in the CS/GO-Fe2O₃ composite enriched with carbon, oxygen, nitrogen, and iron. BET analysis demonstrated a substantially higher surface area than that of conventional adsorbents, increasing from 7.036 m²/g for pure chitosan to 39.946 m²/g for the composite. Adsorption studies identified the optimal conditions at pH 9 and a contact time of 50 minutes. The composite exhibited superior adsorption capacity relative to many reported materials, following the Langmuir isotherm model, which has a maximum adsorption capacity (Qm) of 11.655 mg/g. These findings highlight the composite’s potential as a cost-effective and magnetically separable adsorbent for environmental remediation, offering insights into the design of hybrid materials for organic pollutant removal.
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القسم

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كيفية الاقتباس
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