Equilibrium, Kinetic and Thermodynamic Studies of Adsorption Behaviour of 3D Porous NiFe Nanoparticles for The Removal of Antacid Drug Ranitidine from Waste Water

Abstract The adsorption of the ranitidine on 3D porous NiFe2O4 nanoparticles was studied under different experimental conditions. Adsorbent used in this study, was characterized by SEM, XRD, EDX and BET. The prepared highly pure 3D porous NiFe2O4 nanoparticles displayed a high specific surface area of 65.179 m2/g with a total pore volume of 8.495 nm. The effect of ranitidine concentration, mass of 3D porous NiFe2O4 nanoparticles as adsorbent, contact time (5-30 min.), temperature (30–50 0C), and pH (2-10) on adsorption process were investigated. The adsorption of ranitidine reached equilibrium within 15 min, indicating that 3D porous NiFe2O4 is a promising adsorbent for removing pharmaceuticals from aqueous media. Equilibrium isotherms for the adsorption viz, Freundlich, Langmuir and DR equation were applied and determined characteristic parameters for each adsorption isotherm. Thermodynamic analysis of the adsorption data showed negative ΔG0 and positive ΔH0 suggesting that the adsorption was a spontaneous and endothermic process, associated with mainly physical adsorption.