چكيده به لاتين
In the present work, a polymer nanocomposite consisting of gum arabic and guar gum as biocompatible natural polymers and graphitic carbon nitride (a family of carbon nitride compounds, with the general formula C3N4 and two major substructures based on heptazine and polytriazine imide units that exhibit different degrees of condensation, properties, and reactivity depending on the reaction conditions) was prepared and its application in the field of removing antibiotics ciprofloxacin and erythromycin from aqueous solutions was investigated. The resulting nanocomposite showed a high ability to adsorb the desired antibiotics from aqueous media through hydrogen bonding, electrostatic and π-π interactions. The prepared nanocomposite was characterized using conventional methods including Fourier transform infrared spectroscopy (FT-IR), energy dispersive X-ray analysis (EDX), scanning electron microscopy (SEM), X-ray diffraction (XRD), specific surface area measurement (BET) analysis, vibrating sample magnetometer (VSM), and atomic force microscopy (AFM). Under different conditions, including solution pH (3-11), adsorbent dosage (0.001-0.012 g), contact time (2-20 min), and initial antibiotic concentration (10-80 mg/L) in 10 mL of solution. Based on this study, the adsorption data of both antibiotics were perfectly fitted by the Freundlich isotherm model, while the pseudo-second-order model explained the adsorption kinetics well. The adsorption of ciprofloxacin and erythromycin onto the Magnetite_AG/GG Hydrogel/SF@G-C3N4_AgMOF nanocomposite was successful due to interactions, hydrogen bonding, and π-π stacking. Furthermore, adsorption and desorption experiments showed that the nanocomposite could be regenerated after five reuse cycles without significant loss in antibiotic removal performance
