Abstract
In the present work, successive nanomagnetic-porous CaFe2O4 (CFO) fabrication was achieved using pioneer water-insoluble organic fuels in the sustainable combustion technique and examined to eliminate hazardous Acid Fuchsin (AF) dye from simulated wastewater. The synthesized CFO samples exhibit miscellaneous morphology, including rock-strewn sharp-edge cubic to porous honeycomb particles examined by FESEM analysis. The CFO shows a high surface area (36.7 to 71.2 m2/g), orthorhombic structure, and superparamagnetic nature (magnetic saturation 19.5 to 24.6 emu/g). The AF adsorption mechanism was investigated through isotherm and kinetic study, wherein the Langmuir model and the pseudo-second-order (PSO) kinetic model describe the AF adsorption. The Langmuir maximum monolayer adsorption capacity was found to be 1083 to 2505 mg/g for F1-CFO to F4-CFO (F1-F4 represent fuel 1 – fuel 4) adsorbents. However, the Intraparticle diffusion model (IPDM) shows the multi-linearity plot, suggesting that more than two mechanisms were involved in the adsorption process. The adsorption rate suggests that the morphology of the adsorbent mainly influences the adsorption process. The PSO rate constant was found to be 6.96E-05, 1.00E-04, 1.28E-04, and 1.59E-04 g/mg min-1for F1-CFO, F2-CFO, F3-CFO, and F4-CFO respectively. Innovative visible-light aided photocatalytic regeneration approach effectively generates (heterogeneous activation H2O2) exhausted adsorbents up to eight consecutive cycles: the manifold efficiency and facile magnetic isolation of CFO nanomaterial directed to the sustainable solution in environmental remediation.
Published Version
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