Optimization and kinetic modeling of ciprofloxacin adsorption and photocatalytic degradation in water
Résumé
Abstract The persistent presence of pharmaceutical residues in aquatic environments presents a significant ecological and public health challenge, necessitating innovative and sustainable remediation strategies. This study investigates the dual functionality of a synthesized nickel–aluminum layered double hydroxide (Ni–Al LDH) composite for the efficient removal of ciprofloxacin (CIP), a widely used antibiotic, from wastewater through both adsorption and photocatalytic degradation processes. The Ni–Al LDH was synthesized via co-precipitation and characterized using FE-SEM, EDX, XRD, FTIR, XPS, TGA, and BET techniques. Adsorption experiments demonstrated a maximum adsorption capacity of 14.03 mg g − 1 under optimized conditions, including an initial CIP concentration of 20 mg L − 1 , a contact time of 5 min, an adsorbent dosage of 0.125 g L − 1 , and a pH of 11. The photocatalytic degradation under solar irradiation achieved a removal efficiency of 78.7% at 60 min using 0.02 g of catalyst and an initial CIP concentration of 15 mg L − 1 . The kinetics and adsorption isotherm modeling confirmed the material’s high reactivity and affinity toward CIP. The novelty of this work lies in the application of dual-function Ni–Al LDH for the removal of a pharmaceutical pollutant, demonstrating rapid adsorption kinetics and an enhanced photocatalytic activity, a solar-driven, and a green approach involving ethanol and plant-based reagents for material regeneration, aligning with the sustainable water treatment goals. These findings highlight the material’s promise as an eco-friendly and efficient candidate for practical wastewater treatment applications.
Citer ce document
Accès au document
Texte intégral en lecture en ligne, réservé aux abonnés SPHAERO et aux membres de l'institution. Se connecter
Voir l'article sur le site de la revueAuteur(s)
Statistiques
Consultations : 1
Téléchargements : 0