Comprehensive adsorption and spectroscopic studies on the interaction of magnetic biochar from black wattle sawdust with beta-blocker metoprolol

This study shows the preparation of magnetic biochars (MB) from waste black wattle sawdust, utilizing ZnCl2 and NiCl2 (proportions: 1:0.5:0.5 = MB-0.5 and 1:1:1 = MB-1) as activating and magnetic agents. Synthesized via microwave-assisted-pyrolysis, MB boasts a high surface area (up to 765 m2.g-1) and functional groups, enhancing metoprolol medicine adsorption. Nonlinear kinetic and isothermal models were tested; the Avrami fractional-order kinetic model and Liu's isothermal model provided the best fits for experimental data. Thermodynamics and spectroscopic studies revealed spontaneous and exothermic adsorption processes, with physisorption magnitude and dominance of hydrogen-bond and π-π-interactions. MB can be easily extracted from an aqueous medium using magnetic fields, while adsorption capacity could be regenerated through green solvent elution.PMID:37625653 | DOI:10.1016/j.biortech.2023.129708

Source: Bioresource Technology - August 25, 2023 Category: Biotechnology Authors: Cristiane Ferraz de Azevedo Daniel Lucas Costa Rodrigues Leandro Lemos Silveira Eder Claudio Lima Alice Goncalves Osorio Robson Andreazza Cl áudio Martin Pereira de Pereira Tais Poletti Fernando Machado Machado Source Type: research