Özet:

Waste orange peel (APK) was tested for its ability to remove Cu 2+ ions from aqueous solutions in this study. The orange peel was characterized using scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) for surface morphology and Fourier transform infrared spectroscopy (FT-IR) for surface functional groups. At various temperatures, the kinetic data was applied to the pseudo first order, pseudo second order, Weber-Morris diffusion model, and Elovich kinetic equations. The applicability of Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich (D-R) adsorption isotherms was investigated to better understand the adsorption process. Following the elimination of copper, pseudo second order kinetics and the Langmuir model of isotherms were used. At 298, 308, and 318 K, the adsorption capacities for Cu (II) were 7.74, 7.98, and 8.84 mg/g, respectively. The Gibbs free energy (ΔGo), heat of adsorption (ΔHo), and entropy (ΔSo) of Cu(II) ions were identified using thermodynamic data. It was discovered that the values were -16.76 kJ/mol, 29.43 kJ/mol, and 154.79 j/mol, respectively.

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