ABSTRACT Antibiotics like ciprofloxacin (CIP) are consumed worldwide during microbial infections. However, unconsumed antibiotic gets mixed with water in a variety of ways and then enter healthy humans, where they cause resistance to various bacteria. Antibiotics are resilient substances and prove challenging to eliminate through water treatment methods. Here, ZnOS adsorbent was synthesized by a wet chemical approach. The study included batch adsorption experiments and analysis of many other physicochemical properties. By XRD, the adsorbent's phase was identified, exposing crystalline phases. SEM was used for surface morphology, while EDS was used to analyze its chemical composition. Additionally, ZnOS has undergone FTIR investigations to demonstrate functionalization. In the batch adsorption studies, the adsorption efficiency of CIP achieved 96.1% at an optimized dose of 0.03 mg/20 mL with a pH of ∼ 8. The interaction between CIP and ZnOS follows the Freundlich isotherm model and pseudo‐second‐order kinetics. The antibiotic exhibited an adsorption capacity of 192.3 mg g −1 . The adsorption mechanism for antibiotic removal was driven by van der Waals forces and electrostatic interactions. Desorption‐regeneration studies demonstrated the efficient reuse of the spent ZnOS material over five cycles of CIP adsorption, retaining an efficiency of 82.2%. The results demonstrate effective removal of ciprofloxacin, suggesting the potential for improving water quality through this treatment method.
Garg et al. (Mon,) studied this question.
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