Effective Adsorption of Ciprofloxacin Antibiotic Using Powdered Activated Carbon Magnetized by Iron(Iii) Oxide Magnetic Nanoparticles Publisher



Almusawi TJ¹ ; Mahvi AH² ; Khatibi AD³ ; Balarak D³ Show Affiliations
Source: Journal of Porous Materials Published:2021

Abstract

In the present work, the adsorption performance of powdered activated carbon magnetized by iron(III) oxide magnetic nanoparticles (PAC@Fe3O4-MN) for the removal of ciprofloxacin (CIP) was extensively studied using batch experiments. First, PAC@Fe3O4-MN was synthesized and prepared by co-precipitation method, then it was subjected to characterization study using advanced techniques. Then, the adsorption ability of PAC@Fe3O4-MN for CIP was determined at different initial CIP concentration (10–100 mg/L), pH (3–11), PAC@Fe3O4-MN dose (0.1–0.6 g/L), shaking speed (50–300 rpm), contact time (0–120 min) and temperature (283–328 K). Results showed that PAC@Fe3O4-MN possessed excellent adsorptive properties and had a high practical utility. It was found that PAC particles were partially covered during the magnetization by Fe3O4-MN whereas the surface and morphological properties of both were detected in the characterization analysis of PAC@Fe3O4-MN. Values of the thermodynamic and isotherm parameters (negative Δ Go; positive Δ Ho, and values of KF and B) indicated that CIP adsorption process onto PAC@Fe3O4-MN was favorable, spontaneous and endothermic. Kinetic and isotherm studies manifested that the interaction of CIP with PAC@Fe3O4-MN occurs via both chemical and physical reactions onto a single and homogeneous layer of active sites of PAC@Fe3O4-MN. Furthermore, the rate-controlling step of the kinetic reaction is dominated and controlled by film diffusion for all CIP concentrations that studied. PAC@Fe3O4-MN possessed an excellent adsorption capacity for CIP (109.833 mg/g at pH 7, PAC@Fe3O4-MN dose = 1 g/L, shaking speed = 200 rpm, initial CIP concentration = 100 mg/L, contact time = 60 min, and temperature = 298 K). Finally, the used adsorbent appeared to be sustainable and cost-effective for treatment of CIP laden wastewater, as it can be successfully recycled up to eight consecutive adsorption–desorption cycles. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC part of Springer Nature.