Abstract
For the bioremoval of Fe(III) ions, an active magnetic filter media is synthesized by ultrasound centrifugation. By coprecipitation a magnetic nanoparticles was synthesized, it is then multi-functionalised with a chelating agent, Humic acid (HA), on to a microwave-assisted chemically activated powdered biochar of banana pseudo stem, (BPSC), results in an incorporation of functional groups like -COOH, -OH, -NH2. Textural and magnetic properties were analysed via FT-IR, XPS, BET, FESEM, AFM, TG, DTA, VSM, XRD and CHNS analyser. The adsorption capacity and efficiency of γ-BPSC/HA adsorption were 34.25 mg/g and 98.5%, respectively. By using XPS analysis, it was confirmed that the adsorbent's metal ions were bound to specific binding sites and had a specific capturing mechanism. A mechanism of spontaneous complexation was accomplished, because of the heterogeneity of the surface, electrostatic forces, pore filling, H-bonding, and π-π stacking. Follows PSO kinetics and favours Freundlich isotherm. The adsorbent substance shown a remarkable capacity for regeneration, assuring the substance's stability and reusability.
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