Magnetic Ambrosia artemisiifolia-based biosorbent for Congo red removal from water: A circular economy approach
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Abstract
Biomass-based biosorbents have demonstrated significant potential for removing synthetic organic dyes from water. This study explores the use of a magnetic biosorbent (Fe3O4/MB) derived from Ambrosia artemisiifolia, as a novel material for the removal of Congo red (CR) dye from aqueous solution. The biosorption process was investigated by varying key parameters: pH, Fe3O4/MB dosage, CR concentration, and temperature, followed by kinetic and equilibrium analyses. The structural properties of Fe3O4/MB were characterized with Fourier Transform Infrared spectroscopy (FTIR). The CR concentration was monitored via UV–Vis spectrophotometry. Kinetic studies indicated that the biosorption of CR followed a PSO model (R² = 0.99). Isotherm analysis revealed that the Langmuir model best described the biosorption of CR (R² = 0.97), with a maximum adsorption capacity (Qmax) of 33.56 mg g-1. The implementation of Fe3O4/MB supports sustainable water management and contributes to the development of greener, and more circular industrial practices.
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Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution license 4.0 that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
Funding data
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Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja
Grant numbers 451-03-136/2025-03/200026;451-03-136/2025-03/200168
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