Adsorption of Ciprofloxacin on Silver‐Coated Magnetic Iron Oxide Nanoparticles: Characterization, Optimization, and Kinetics

Abstract

Ciprofloxacin (CIP) is the commonly prescribed fluoroquinolone antibiotic and one of the top ten emerging pharmaceutical contaminants in the world. It can pose a potential health risk if its residues enter the body. In this study, the adsorption of CIP onto magnetic iron oxide nanoparticles coated with silver (Fe3O4@AgNPs) was evaluated. Fe3O4@AgNPs were characterized by Fourier Transform Infrared Spectroscopy (FTIR), X‐ray Diffraction (XRD), and Scanning Electron Microscope (SEM). The parameters affecting the adsorption of CIP on nanoadsorbent were investigated including the adsorbent dose, pH, contact time, the salt content, and mixing speed. The highest efficiency of removal was achieved at pH 6, adsorbent dose of 3 mg l−1, salt content of 1 % (W/V) and shaking rate of 100 rpm. The adsorption process of CIP on the nanoadsorbent followed the Freundlich adsorption isotherm model, the adsorption kinetics was pseudo‐second order and the maximum adsorption capacity was 125 mg g−1.