Use of Natural Clinoptilolite in the Preparation of an Efficient Adsorbent for Ciprofloxacin Removal from Aqueous Media

The adsorption of the antibiotic ciprofloxacin (CIP) from an aqueous solution by natural zeolite, calcium-rich clinoptilolite (CLI), and magnetite-coated CLI (MAG-CLI) was investigated. Both MAG-CLI showed a high affinity towards CIP at 283, 288 293 K pH 5. Adsorption kinetics studied for initial concentrations 15–75 mg dm?3 follow Lagergren’s pseudo-second order equation is best represented Langmuir model. mechanism involves strong electrostatic interactions between negatively charged aluminosilicate lattice cationic form accompanied ion-exchange reaction. Magnetite coverage (approx. 12 wt.%) induces magnetism, which can facilitate separation process. does not influence activity CLI. leaching test that MAG coating protects adsorbent leaching. This ascribed to carboxyl groups magnetite nano-particles. Antibacterial tests antibacterial ciprofloxacin-containing adsorbents pathogenic E. coli S. aureus.