چكيده به لاتين
This study has investigated the adsorption of ibuprofen using a natural adsorbent of luffa modified with silver nanoparticles. Modified adsorbent with Ag nanoparticles was characterized by energy-dispersive X-ray spectroscopy (EDS), fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), and zeta potential. The removal percentage of ibuprofen was studied by various factors such as agitation type, pH, initial drug concentration, contact time, agitation rate, and adsorbent amount. The optimized experimental parameters achieved in 60 min by means of Vortex device in pH=5, initial concentration of 200 µgml-1, stirring speed=1, and adsorbent amount of 25 mg. Isotherms were fitted best to the Freundlich model. Kinetic data show that the adsorption of the drug follows a pseudo-second-order kinetic model. According to the obtained results, the adsorption capacity of ibuprofen was 71 mgg-1, and 92% of the drug was removed in aqueous solutions under optimal conditions. The mechanism of adsorption was accomplished by π-metal interaction, hydrogen bonding, electrostatic interactions, and π-π stacking. The results showed that the modified luffa with silver nanoparticles is a suitable adsorbent for removing ibuprofen from aqueous solutions.
