SYNTHESIS, CHARACTERIZATION AND APPLICATION OF Bi2Fe4O9–GO NANOCOMPOSITE FOR THE REMOVAL OF METHYLENE BLUE DYE FROM AQUEOUS EFFLUENT

Taznur Ahmed, Susmita Sen Gupta

The nano-composite Bi₂Fe₄O₉-GO is prepared in solvothermal approach as adsorbent for the purposes of removal of Methylene Blue (MB) dye from aqueous effluents. The material Bi₂Fe₄O₉-GO is characterized by XRD, FESEM, EDX, BET surface area measurement, XPS and Zeta potential measurement at various pH. The adsorption process attribute good agreement for the pseudo 2^nd order adsorption kine-tics at various temperature. Isotherm analysis in dye uptake at various concentration shows closeness towards Langmuir isotherm with monolayer capacity value (q_e= 55.46 mgg^-1). The nature of adsorption is endothermic and pH sensitive. The Gibb’s free energy calculation and reusability study suggest physisorption interaction between adsorbent-adsorbate, indicating perfect adsorbent for adsorption process

doi.org/10.32737/0005-2531-2023-2-78-96

Keywords : Bi2Fe4O9-GO nano composite, methylene blue, kinetics, isotherm, thermodynamics

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№3 2026

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